KEYSIGHT N9913A FieldFox Handheld Analyzers Instruction Manual

TECHNICAL OVERVIEW FieldFox Handheld Analyzers
4/6.5/9/14/18/26.5/32/44/50 GHz
N9913A N9914A N9915A
N9925A N9935A N9916A
N9926A N9936A N9917A
N9927A N9937A N9918A
N9928A N9938A  N9950A N9960A
N9951A N9961A N9952A N9962A

Carry Precision with You

Measuring up and earning a spot in your field kit is the driving idea behind Keysight’s FieldFox handheld analyzers.
They’re equipped to handle routine maintenance, in-depth troubleshooting and anything in between. Better yet, FieldFox delivers precise microwave and millimeter-wave measurements – wherever you need to go.
Why choose FieldFox?

• Measure with confidence – precise measurements agree with benchtop results
• Withstands your toughest working environments – rugged enough to meet MIL-specs
• Weighs less than alternative solutions – 7.1 lb (3.2 kg)
• Offers budget flexibility – choose capabilities you need today and easily upgrade later

RF and microwave (combination) analyzers Base:
Cable and antenna analyzer
Key options:

• Spectrum analyzer
• Vector network analyzer
• Built-in power meter
• Pulse measurements
• Channel scanner
• GPS receiver
• Real-time spectrum analyzer
• 89600 VSA software connection
• Surveyor 4D software connection
• I/Q analyzer
• IQ streaming
• Noise figure
• Over-the-Air (OTA) LTE FDD/TDD and 5GTF
• Indoor and outdoor mapping
• EMF measurements

Microwave vector network analyzers
Base: Transmission/ reflection vector network analyzer (VNA)
Key options:

• Cable and antenna analyzer
• TDR cable measurements
• Full 2-port S-parameters
• Time domain
• QuickCal
• Vector voltmeter
• Built-in power meter
• External USB power sensor support
• Pulse measurements
• GPS receiver

Microwave spectrum analyzers
Base: Spectrum analyzer
Key options:

• Full-band tracking generator
• Full-band preamplifier
• Built-in power meter
• Pulse measurements
• Channel scanner
• GPS receiver
• Real-time spectrum analyzer
• 89600 VSA software connection
• Surveyor 4D software connection
• I/Q analyzer
• IQ streaming
• Noise figure
• Over-the-Air (OTA) LTE FDD/TDD and 5GTF
• Indoor and outdoor mapping
• EMF measurements

Leverage Our Legacy of Measurement Leadership
With FieldFox, you’re carrying the precision of our industry-standard benchtop analyzers.
By delivering levels of consistency not available in any other handhelds, FieldFox ensures confidence in your results.
Inside, we leveraged well-tested algorithms from Keysight’s high-performance VNAs. To lighten your load, we simplified calibration by adding built-in standards and eliminating the need to carry calibration kits.
To enhance spectrum analysis, FieldFox includes the same PowerSuite measurements used in Keysight X-Series signal analyzers, enabling fast, accurate, one- button characterization of channelized communication systems. The InstAlign capability lets you
instantly make accurate power measurements in the field, even when temperature fluctuates.
FieldFox industry innovations
First 50 GHz handheld microwave analyzer
Cable and antenna analyzer
DTF and TDR in a single sweep
Vector network analyzer
Dynamic range up to 100 dB
Spectrum analyzer
Absolute amplitude accuracy ± 0.5 dB

“FieldFox’s result is almost identical to my PNA. I want one of these for all of my engineers.”
— Senior calibration engineer from spacecraft research and development center.

Increase System Uptime and Reduce Mission Risk

Install and maintain cellular systems with the cable and antenna (CAT) tester

• Ensure communication continuity with all the essential measurements needed to troubleshoot and maintain microwave links
• Increase your team’s preparedness in the harshest environments with a completely sealed instrument rugged enough to meet MIL specs
• Always be at the ready with an instrument display easily optimized for clear viewing in direct sunlight or darkness
• Reduce measurement complexity and time-to-repair with quick and accurate line sweeps in the field without calibration kits
• Protect your investment by adding software license key upgrades as your needs change

Work better and faster in radar installation and maintenance (I &M)

• Improve your team’s efficiency with a single analyzer that provides network, spectrum, and power measurements up through the Ka and Q bands
• Increase your confidence with system and component measurements that agree with trusted Keysight/Agilent/HP benchtop instruments
• Ensure your team’s readiness with an instrument rugged enough to meet MIL-PRF28800F Class 2 and IP53 specs
• Increase system uptime and reduce mission risk with fast and accurate characterization of cables, waveguides, and components
• Reduce your cost of ownership, with only one instrument to purchase and maintain

Accelerate I &M work at satellite ground stations

• Validate system performance with fast, detailed analysis of up uplink and downlink signals
• Maintain cable, waveguide, and antenna systems consistently and efficiently with calibrated VNA and CAT measurements
• Quickly diagnose faults using built-in cable and antenna analysis, network analysis, and power measurements
• Perform accurate frequency translation gain/loss measurements to verify upconverters and downconverters at the LRU level
• Depend on MIL-spec ruggedness and a completely sealed instrument, designed to withstand harsh environments

Learn more about FieldFox applications and download resources at: www.keysight.com/find/fieldtest

Enhance Research and Education

Add the ultimate companion tool to every R &D bench

• Equip your lab with must-have measurements up to 50 GHz and beyond with the affordable FieldFox
• Increase your confidence with measurements that agree with trusted Keysight/Agilent/HP benchtop instruments
• Get unprecedented flexibility with the multi-function FieldFox
• Give your team measurement convenience with a portable form factor and battery operation
• Free up high-performance benchtop instruments with FieldFox

Bring a new dimension to engineering classes and labs

• Optimize EE/ECE department budgets with as many as 20 instrument capabilities in one
• Buy what you need today, and add features via software license keys as your curriculum changes
• Achieve maximum teaching efficiency with a portable instrument that is easy to carry from class to lab and provides battery life of 3.5 hours
• Enhance student comprehension by remotely projecting, monitoring, and controlling the instrument
• Reinforce theoretical concepts by easily demonstrating measured results
• Save time developing your curriculum with complimentary readymade lesson plans

Pick Up FieldFox for its Ergonomics

… and Depend on Its Durability and Convenience

Utilize the Industry’s Most Comprehensive Handheld Analyzers

Cable and antenna analyzer

• Distance-to-fault (DTF) and return loss/VSWR
• 1-port cable loss, 2-port insertion loss, and time-domain reflectometry (TDR)
• Integrated QuickCal up to 18 GHz for simple field measurements – no calibration kit required

Spectrum analyzer

• Unprecedented amplitude accuracy of ± 0.5 dB with InstAlign 1 – no warm-up required
• Tracking generator, independent source, and preamplifier covering the full frequency range
• Channel power (CHP), occupied bandwidth (OBW), spectrum emission mask (SEM), adjacent channel power (ACP)
• Interference analysis and analog demodulation

Vector network analyzer

• All four S-parameters, magnitude and phase
• Time-domain analysis, mixed-mode reflection S-parameters
• CalReady, QuickCal, full 2-port cal, TRL, waveguide cal, ECal support, and a Guided Calibration Wizard

Real-time spectrum analyzer (RTSA)

• Capture signals as short as 12 µs with 100% POI with a maximum 10 MHz real-time bandwidth and full amplitude accuracy
• Visualize small signals as short as 22 ns independent of amplitude accuracy
• Detect a low-level signal in the presence of a high-power transmitter using the spectrum density view

Built-in power meter

• Power measurements over a defined bandwidth, without an external sensor
• Easy to view analog and digital displays
• ± 0.5 dB accuracy with InstAlign 1

Power measurements using a USB power sensor

• Accurate absolute power measurements at a CW frequency
• Swept-frequency power measurements
• Frequency-offset capability for converter test

Pulse measurements using a USB peak power sensor

• Peak power, average power and peak-to-average ratio measurements
• Pulse profile characterization
• Portable solution for radar pulse analysis

Vector voltmeter

• Cable trimming, phase shift, and electrical length measurements
• A/B and B/A ratio measurements
• Similar functionality to the HP 8508A VVM

Extended range transmission analysis (ERTA)

• Scalar insertion loss measurement of in-situ cables with long distances between test ports
• InstAlign enables accurate microwave measurements with no warmup
• Converter test using ERTA’s frequency-offset capability

Channel scanner

• Channel power measurements up to 20 channels
• Customizable frequency and bandwidth settings for each channel
• Data logging capability with geo tagging

Noise figure (NF)

• Portable Y-factor noise figure measurements for amplifiers, downconverters, upconverters, and converters
• Auto integration mode optimizes gain to avoid compression and measurement time to achieve jitter goal
• User definable loss compensation for loss (dB) before and after DUT
• Built-in uncertainty calculator displays vertical bars representing the calculated measurement uncertainty overlaid on the trace data
• Supports Keysight’s noise source models 346A/B/C/K40/K01 and external preamplifiers models U7227A/C/F or U7228A/C/F

I/Q analyzer (IQA)

• Frequency and time domain measurements up to 10 MHz of analysis bandwidth
• I/Q capture parameters include capture time, sample rate, sample period and capture samples
• Customize display with up to 4 simultaneous and multi-domain measurement views
• Enhance performance with features such as amplitude and IF alignment before capture
• I/Q capture data file types include CSV, text (TXT), SDF (compatible with 89600 VSA software), MATLAB (MAT)
• Requires spectrum analyzer option (not supported on model N9912A)

I/Q streaming

• Enables FieldFox to conduct IQ data streaming at maximum of 1 MHz bandwidth in VITA format with GPS precision time stamping
• Provides gapless IQ data to external application software to perform spectrum monitoring, demodulation, and decoding
• Streamed data can be saved on a PC hard drive
• Requires IQ analyzer (option 351), not supported on model N9912A.

89600 VSA software connection

• Windows based software for signal demodulation and vector signal analysis
• Connected VSA software runs on external PC or tablet
• Transmitting signal quality verification
• Analysis bandwidth: 10MHz
• Spectrum, IQ constellation, error vector magnitude (EVM), time domain waveform and frequency error display views
• Record a signal’s IQ data for offline process or playback
• Keysight model number 89601B, requires spectrum analyzer option on FieldFox (not supported on model N9912A)

Over-the-Air (OTA)

• Portable OTA LTE FDD/TDD and 5GTF measurements for base station downlink multi-path and multi-cell environments
• Modulation analysis of downlink primary and secondary synchronization signals (PSS and SSS)
• Scan results of key performance indicators (KPI’s) including Cell ID, RSRP, RSRQ, RSSI, PSS, SSS, SINR and Frequency Error
• Configurable display with up to four windows including table, bar chart, magnitude spectrum, and strip chart data formats
• Supports record, recall and playback of data with geo-location information for post analysis (CSV or KML file formats)

Phased array antenna support 1

• Supports 64-element, single polarization phased array antenna with coverage from 27.5 to 30 GHz
• Understand gNB beam characteristics by measuring signal power level across azimuth and elevation from base stations
• Reduce measurement complexity with integrated RF probe and phased array solution to capture energy radiated from gNB
• Calibrated millimeter wave phased array antenna simulates 5G UE antenna performance
• Phased array performance verification showing boresight, polar antenna pattern with compass, and heat map (azimuth vs. elevation)
• Battery powered, no fans or vents, and IP53 rated design to test 5G gNB under any condition

EMF measurements

• Portable EMF measurements 30 MHz to 6 GHz for compliance and verification of EMF exposure levels in the field
• EMF spectrum analyzer channel power measurements for various RF/MW networks such as mobile phones, base stations, Wi-Fi, smart meters, IoT device, as well as satellite and radar systems
• Supported in spectrum analyzer channel power measurements and total field strength can be measured across the frequency band of interest
• Supports connectivity to AGOS Advanced Technologies Triaxial Isotropic Antenna, model SDIA-6000
• Record, recall and playback of data with geo-location information for post analysis

Indoor and outdoor mapping

• Import maps from OpenStreetMap (OSM) or floor or site plan picture files (PNG, JPG, BMP) for indoor or outdoor data collection and mapping
• Auto measure and record data in time or distance intervals and map data results overlaying map on the FieldFox instrument display
• Save maps to the FieldFox internal memory, SD card or USB drive via a direct wired LAN connection or the FieldFox Map Support Tool
• Supported in Channel Scanner, Phased Array Antenna, Over-the-Air LTE FDD/TDD and 5GTF modes

N6820ES Surveyor 4D Software

• Advanced spectrum monitoring software covering VLF to 5G millimeter wave frequency bands
• Comprehensive and flexible with robust energy detection algorithms and integrated modulation classification
• Flexible search modes with energy threshold detection, system level triggers and automatic alarm tasking
• Supports I/Q and spectrum recordings and integrated SQL database for logging of statistics
• Surveyor 4D software runs on external PC or tablet connected to FieldFox

Choose the FieldFox that Meets Your Needs

Notes:

• For more information on N9912A, see FieldFox N9912A RF Analyzer, Technical Overview (5989-8618EN)
• For more information on N9923A, see FieldFox N9923A Vector Network Analyzer, Technical Overview (5990-5087EN)

Create the Right Configuration for Your Application
Select the capabilities you need today and add more as needs change: features are field-upgradeable and are added via software license keys. RF and microwave analyzers are referred to as combination analyzers in this section.

Feature 1| Combination analyzers| Vector network analyzers| Spectrum analyzers
---|---|---|---
| N9912A| N9913/4/5/6/7/8A N9950/1/2A| N9923A| N9925/6/7/8A| N9935/6/7/8A N9960/1/2A
CAT/ vector network analysis
Cable and antenna analyzer| √| √| √| VSWR and reflection
VNA transmission/reflection| √| √| √| –
VNA full 2-port S-parameters| –| √| √| –
1-port mixed-mode S-parameters| –| √| √| –
VNA time domain| √| √| √| –
QuickCal| ü| √(N991xA only)| ü| –
TDR cable measurements| –| √| –| –
Vector voltmeter| 1 port| √| √| –
Spectrum analysis| | | |
Spectrum analyzer| √| √| –| √2
Extended range transmission analysis (ERTA)| –| √| –| √2
Tracking generator| √| √| –| √2
Pre-amplifier| √| √| –| √2
Interference analyzer and spectrogram| √| √| –| √2
Spectrum analyzer time gating| –| √| –| √2
Channel scanner| √| √| –| √2
Analog demodulation| –| √| –| √2
Real-time spectrum analyzer (RTSA)| –| √2| –| √2
I/Q analyzer (IQA)| –| √2| –| √2
Indoor and outdoor mapping| –| √2| –| √2
IQ streaming| –| √2| –| √2
Noise figure (NF)| –| √2| –| √2
EMF measurements| –| √2| –| √2
Phased array antenna support| –| ü 2 (N995xA only)| –| √2
Over-the-Air (OTA) LTE FDD/TDD| –| √| –| √2
Over-the-Air (OTA) 5GTF| –| √| –| √2
Power measurements| | | | √2
USB power sensor meas. versus frequency| √| √| √| √2
USB power sensor support| √| √| √| √2
Pulse meas. with USB peak power sensor| √| √| √| √2
Built-in power meter| √| √| –| √2
System features| | | | √2
Remote control capability| √| √| √| √2
GPS receiver| external| √| external| √2
DC bias variable-voltage source| –| √2| –| √2
SCPI over LAN and USB3| √2| √2| √2| √2
Windows based software| | | | √2
89600 VSA software| –| √2| –| √2
N6820ES Surveyor 4D Software| –| √2| –| √2

1 Some of the features listed here require an option. See the FieldFox Handheld Analyzer Configuration Guide for complete information on all FieldFox products and accessories http://literature.cdn.keysight.com/litweb/pdf/5990-9836EN.pdf
2 Requires CPU2 fast processor. All N995xA and N996xA analyzers include CPU2. On other FieldFox models, if the serial number starts with MY5607/SG5607/ US5607, then it has CPU2. If the serial number prefix is different, then the analyzer firmware needs to be checked to see if the instrument has been upgraded with N9910HU-100/200/300/400 to have CPU2.  3 SCPI over USB for N991x/2x/3xA is available for serial number prefix ≥ MY5607/SG5607/US5607 or upgraded with Option N9910HU-xxx.

Cable and Antenna Analyzer
Fifty to sixty percent of microwave-link equipment issues are related to cables, antennas and connectors. Degraded feeder lines cause poor coverage, link failures, and reduced sensitivity in the receive path. To maintain the quality of a microwave link, it is critical to keep cable and antenna systems in good working condition. FieldFox is uniquely qualified to provide all the necessary measurements to troubleshoot and maintain these systems.

Insertion loss and cable loss
Insertion loss or cable loss characterizes the loss of a jumper cable, feeder cable, diplexer, orgain of a tower-mounted amplifier (TMA). With FieldFox, you can measure both the 1-port cable loss and 2-port insertion loss. Also, FieldFox’s ERTA option, described on page 19, is useful for measuring long, lossy in-situ cables.
Return loss/VSWR
Return loss (RL) or VSWR is the single most important parameter used to measure and verify a cable and antenna system. This measurement reflects the power transfer efficiency of a given system.

Distance-to-fault (DTF) and time-domain reflectometry (TDR)
DTF helps you determine the location of discontinuities in feeder lines. TDR helps you determine the nature of the discontinuities, for example, short, open, or water ingress.
With FieldFox, you can make RL and DTF measurements at the same time. This helps you correlate overall system degradation with specific faults in the cable and antenna system. The built-in cable editor lets you edit existing cable types onsite and save them as new cable types with user-defined names.

Measure both DTF and TDR in single sweep
FieldFox’s TDR complements RL and DTF measurements. TDR measures impedance changes along the cable and helps identify specific faults, RL exposes mismatch issues, and DTF indicates faults and poor connections. FieldFox is the only handheld instrument that can measure both DTF and TDR in a single sweep.

CalReady-calibrated at power on and ready to go
Save time and get right to work with FieldFox’s CalReady feature. With CalReady, the analyzer is already calibrated and ready to make measurements such as S11, S22, 1-port cable loss, and DTF/TDR measurements without having to connect and disconnect additional calibration devices.
Hassle-free calibration in the field with QuickCal
FieldFox comes with a built-in calibration capability that allows you to calibrate the network analyzer without carrying a cal kit into the field. With any other test instrument, when you add additional devices to the test port, such as jumper cables or adapters, you need to recalibrate using a cal kit. FieldFox’s QuickCal supports measurements such as insertion loss/gain, 1-port cable loss, return loss, and DTF/TDR. Note: N995xA does not support QuickCal.

Broadband calibration
FieldFox allows you to make broadband calibrations, which means the instrument is calibrated over the maximum frequency range. After a broadband calibration, you can change the frequency range or number of points without recalibrating the instrument. The calibration is interpolated, and accuracy is maintained.
User cal kit support
For users who wish to use traditional mechanical calibration kits, FieldFox supports most Keysight/Agilent/HP cal kits, and also allows you to define your own custom calibration kits.
Fast and accurate calibration with ECal
The FieldFox calibration engine supports Keysight’s USB ECal modules. ECal support reduces calibration time and the need to make multiple connections during testing, while also providing for greater consistency between measurements. For FieldFox users, that translates into fewer human errors and increased accuracy.

Spectrum Analyzer
In microwave, radar, and satellite communications, and commercial microwave backhaul, you may be responsible not only for hardware installation and maintenance, but also overthe-air signal quality. You may also need to regularly monitor unexpected signals and perform signal surveillance.
FieldFox’s spectrum analyzer is optimized to excel in a dynamic spectral environment. You may face measurement challenges such as the need to detect a low-level signal under strong signal conditions (requiring high dynamic range), or close-in small interference signals (requiring excellent phase noise). FieldFox’s superior dynamic range (TOI > +15 dBm), close in phase noise (-111 dBc/Hz at 10 kHz offset), and fast sweep time make these challenging tasks easier. FieldFox’s spectrum analyzer also provides a full power measurement suite and complete trace and state control.

Unprecedented amplitude accuracy without instrument warm-up
With FieldFox’s InstAlign capability, internal amplitude alignments occur automatically asenvironmental conditions change, without any user intervention. This provides unprecedented amplitude accuracy of ± 0.5 dB for spectrum analysis and power measurements. Better yet, FieldFox provides this accuracy immediately upon instrument turn on – no warm-up required.

Channel power measurements
In modern wireless communications, the ability to accurately measure the power of digitally modulated signals enables you to maximize the capacity of a system and improve the quality of communication. For broadband signals, FieldFox offers fast and accurate power measurements that include channel power, occupied bandwidth, adjacent channel power and spectrum emission mask (SEM). When performed manually these measurements can be complicated and time consuming, but the FieldFox power measurement suite makes measurement setup fast and simple.
Spectrum Emission Mask (SEM)
SEM measurement is used for characterizing transmitting signals where the power from in- band and out-of-band emissions is measured at specified frequency bandwidths and at specific offsets relative to the total carrier power. The SEM measurement is performing a segmented sweep, segmenting a different frequency on the lower level and upper level from a reference center frequency. Each segment may have different frequency span, resolution bandwidth (RBW) and integrated channel bandwidth settings. Supports up to 8 offset segments and pass or fail mask with absolute or relative limit lines.

Spectrum analyzer time gating
The testing of RF pulses is always challenging because so many instrument settings interact. With Option 238, gated FFT with time gating, FieldFox behaves like a spectrum analyzer and an oscilloscope. This enables you to quickly detect pulses in the time and frequency domains. A gate time of 6 µs to 1.8 s enables simultaneous examination of one or more pulses, or pulse rise and fall times, revealing the effects of spectrum growth due to various pulse shapes. Functions such as video trigger, external trigger and RF burst ensure reliable pulse detection. Automatic trigger-delay and bandwidth settings enhance characterization of RF pulses.

Periodic frame trigger synchronized with GPS
Periodic frame trigger allows for trigger execution at a fixed interval between successive executions. Modern communication systems like 5G use TDD for spectrum access, periodic trigger with time gating can help to differentiate uplink and downlink signals, this is particularly useful to find uplink interference in TDD networks. When the measurement is triggered by a frame boundary, which can be synchronized with GPS, then the data is captured only within the designated boundary.

Real-time spectrum analyzer (RTSA)
With the widespread increase of wireless technologies in commercial and military networks, the spectral environment is filled with intentional and unintentional interference. The interfering signals result in network quality deterioration and communication link breakdowns. Additionally, the prevalent use of digital modulation and burst-transmission methods have made it difficult to reliably detect interference sources. This is where RTSA in FieldFox can help. By combining a fast, overlapping FFT processing technique, gap-free data acquisition, and 10 MHz real-time bandwidth, FieldFox is able to detect signals as short as 12 µs with 100% POI with full amplitude accuracy. In some applications, detecting signals is the critical factor, independent of amplitude accuracy. In such cases, FieldFox can detect signals as short as 22 ns.

The spectrum density view displays three-dimensional data on a two-dimensional display. It uses color to show the number of times a frequency and amplitude point is detected during a capture interval. This is an excellent way to understand and visualize the spectral occupancy of the frequency band. For example, with RTSA you can detect a low-level signal in the presence of a high-power transmitter using the spectrum density view. Finding an elusive signal can typically take hours or days. With FieldFox’s recording and playback, data can be saved for further analysis offline at a later date. With RTSA in FieldFox, you can now eliminate the need for a separate, dedicated instrument. When needed, just shift to real-time capabilities in the same unit with one key press.

N6820ES Surveyor 4D softwar e
Turn FieldFox into a portable, battery operated spectrum monitoring system by adding the N6820ES Surveyor 4D software. This powerful software allows the user to configure up to four high-resolution, flexible spectral displays. These displays can simultaneously showdifferent parts of the spectrum in either a traditional spectrum view or full-color spectrogram.Further, Surveyor 4D includes features to automatically detect signal energies, extract theirbasic parameters and log the information to a  atabase. With the optional modulationrecognition feature, the software turns the FieldFox into a powerful signal classifier with 25 different analog and digital modulation formats that can be recognized from a live spectrum orpreviously recorded IQ times-series data.

Finally, Surveyor 4D provides an alarm function that can trigger actions (recordings, email, etc.) based on simple or complex criteria derived from the extracted signal parametric data. Highly configurable in fully automatic or manual operating modes, Surveyor 4D software dramatically steps up the spectrum monitoring capabilities of the FieldFox.

Interference analyzer
Interference can be internal or external, uplink or downlink, and has a direct impact on the quality of service (QoS) of a communication network. FieldFox’s interference analyzer is designed to identify interfering signals quickly. Spectrogram and waterfall displays detect intermittent signals or monitor signals over a period of time. You can record signal traces into internal memory or external flash memory devices and play back the saved traces for offline processing. It has excellent dynamic range.

Channel scanner
Channel scanner allows users to make multiple channel power measurements simultaneously. It is used to verify wireless network coverage, path loss and potential interference issues. It also can be used to measure primary carriers and their intermodulated products. Each instrument state can be a custom set of frequencies with each frequency having a unique integrating bandwidth. Users can record and playback the data with data logging. Using time interval logging along with geotagging, files can be exported to Google Earth for network coverage analysis.

Noise figure (NF)
Communication system capacity is limited by internally generated noise. This noise will impact link budget, increase investment on the transmitter design, or will increase antenna cost at the receiver. One of the key performance indicators for a receiver is its sensitivity, which is the ability to reliably discern small signals that are close to the noise floor. The performance of a communication system is also based on signal-to- noiseratio (SNR). While vector network analyzer S-parameter measurements and spectrum analyzer channel power and adjacent channel power measurements may be used to evaluate the signal behavior, additional evaluation of internally generated noise is necessary to have a full picture of the total system performance. As such, noise figure  measurements can be used to quantify the degradation in SNR caused by components in the link. The FieldFox noise figure mode uses the industry proven Y- factor technique to accurately verify and characterize the noise figure of devices. FieldFox can also provide real-time feedback on measurement integrity with built-in uncertainty calculator error bars that can be displayed on the measurement data.

AM/FM analog demodulation
Using FieldFox’s analog demodulation, users maintaining AM/FM radio transmitters can demodulate and characterize AM and FM transmitters. They can tune to the signal and listen to the audio tones using FieldFox’s built-in speakers or a headphone. They can also measure the RF spectrum and AF spectrum, the demodulated waveform and AM/FM metrics such as carrier power, modulation rate, and SINAD. A full set of post-demod filters are also supplied.

IF signal output
FieldFox provides a spectrum analyzer IF output with 25 MHz bandwidth. This enables use as a frequency downconverter and digitize the signal using external test equipment like real time scope, or VSA to do deep signal analysis.
Field strength measurements
To characterize the electric and magnetic fields, the gain and loss of the antenna and cables must be accounted for. With FieldFox, you can load antenna factors and cable loss data using either the front panel or the complimentary Data Link software.

Independent signal source
FieldFox has a built-in independent signal source, with a frequency range of up to 50 GHz.
The signal source can be tuned to any frequency, independent of the spectrum analyzer frequency. You can use the signal source to create a test signal to measure coverage, antenna isolation, antenna direction alignment, shielding effectiveness, and to verify frequency-offset devices.

Extended range transmission analysis (ERTA)
Measure long, lossy cables using ERTA
Measuring long in-situ microwave cables such as those on ships is a challenging task and requires instruments with high dynamic range and fast measurement speed. These measurements were traditionally done using benchtop scalar analyzers, which are cumbersome to operate in the field. Using FieldFox’s ERTA, users can measure dynamic ranges of 108 dB (at 6 GHz) or 77 dB (at 26.5 GHz), with a portable analyzer that requires no calibration and no warm-up. ERTA uses two FieldFox, one deployed at each end of the cable. One FieldFox acts as a source, while the other acts as a receiver. By taking advantage of Keysight’s proprietary InstAlign technique, this configuration can be used to make cable loss measurements with accuracy of ± 0.7 dB.

Digitally modulated signal quality verification
Most modern wireless communication signals are digitally modulated to improve system capacity and enhance the ability to counter interference. In order to improve system capacity/spectrum efficiency, increasingly higher order modulation schemes are deployed. One of the key challenges to evaluating overall system performance is to correlate RF component performance to signal quality over-the-air. Keysight’s PathWave (89600) VSA software can analyze digitally modulated signals simultaneously in the modulation, time and frequency domains providing useful insight to modulation quality with measurement displays views including spectrum, IQ constellation, EVM, frequency error and many more. The 89600 VSA link provides a

powerful combination of hardware and software for design and troubleshooting of devices using signal formats such as APCO25, TETRA for public safety radio, IEEE 802.11p for wireless vehicular communications, low power wide area networks and other IoT formats, as well as cellular communications including LTE, WCDMA, GSM and more. FieldFox can connect to the PathWave (89600) VSA software (Keysight model number 89601B) via Ethernet to a Windows based PC or tablet. In order to connect with the 89600 VSA software, FieldFox requires a spectrum analysis option.
I/Q analyzer
I/Q analyzer mode is the ideal capturing tool to verify final signal chain integration or troubleshoot signal quality degradation due to hardware or software issues. Frequency and time domain measurements provide demodulated I/Q data that can be analyzed with customizable multi-domain display views. I/Q data can also be captured on the instrument and analyzed using 89600 VSA software, MATLAB, Python tool kit and other third-party demodulation software. Additionally, I/Q capture data of an RF signal environment can be re-generated and played back using a vector signal generator. Features such amplitude and IF alignment before capture and single or continuous capture allow for enhanced performance and flexibility. With option 353 (IQ streaming), FieldFox enables IQ data streaming in VITA 49 format with GPS precision time stamping. This capability provides gapless IQ data to external application software to perform spectrum monitoring, demodulation, and decoding. The streamed data can be saved on a PC hard drive.

Over-the-Air (OTA) Measurements for LTE FDD or TDD
Our wireless networks have become ever-increasingly complex with roll out of 4G and upcoming 5G. One of the key challenges is the question of “what network coverage is”, since today’s wireless networks are comprised of macrocells, microcells, and picocells, and these cells are deployed in layers. The macrocell provides overall coverage, while the microcell and picocell deliver high data throughputs to end users. To guarantee smooth handover from various cells and frequencies, it is essential to make sure each cell has sufficient neighbors to handle various communication scenarios from mobile users, like coverage for voice, text messages and data services. At any given location, a mobile phone likely sees all types of these cells at the same time and must determine which ones are intended for the phone. With the OTA measurement on FieldFox, engineers can scan the area to determine how many type cells are available and which cells are good neighbors.

FieldFox LTE FDD or LTE TDD OTA demodulation can provide insights to available cells with physical cell ID (PCI) on any given frequency, or often times this is called component carrier. This measurement demodulates and decodes all available cells on a single component carrier allowing engineers to see if any additional cells are available to use, thereby addressing the common problem of finding missing neighbors. In addition to single carrier multicell measurements, FieldFox also displays the strongest cell on different component carriers (up to a maximum of 6 cells, if present). This greatly expedites the process to find out which frequencies are the best for any given location and optimizes inter-frequency handover. LTE FDD or LTE TDD OTA measures and decodes cell ID, RSRP, RSRQ, RSSI, PSS, SSS, SINR and frequency error.

Over-the-Air Measurements for 5G(TF) 1
5GTF is a pre-5G standard for the wireless network running on the millimeter- wave frequency band that offers gigabyte data rates. The key challenges for 5G network deployment are characterizing millimeterwave pathloss and coverage. Since 5G network technology uses beamforming and massive MIMO to achieve high data rates, its control channels are not always on. To measure the effective coverage, FieldFox 5G OTA can measure PSS, SSS and decode cell ID, which are key parameters to verify 5G coverage. Since 5G control channels are not always on, they are using initial access beam sweeping, which can make it challenging to determine the location of the 5G signal. Switching into RTSA mode on FieldFox can quickly and reliably detect 5G signals, detect control  hannels and provide insights to beamforming performance. 5GTF OTA measures PSS, SSS channel and decode cell ID, supporting a total 8 component carriers that can be measured at same time.

EMF Measurements
Radio frequency electromagnetic fields (EMF) are key tests to evaluate total RF exposure in any given area due to deployment of various RF/MW networks, such as mobile phones, base stations, Wi-Fi, smart meters, IoT devices, as well as satellite and radar systems. Exposure limits for electromagnetic field (EMF) radiation differ by country. Many countries around the world base their regulations on findings from research organizations like the International Commission on Non-Ionizing Radiation Protection (ICNIRP), the Institute of Electrical and Electronics Engineers (IEEE), and the Federal Communication Commission (FCC).

Compliance and verification of exposure levels set by these government and regulatory agencies need to be verified in the field. FieldFox with EMF measurements supports connectivity to AGOS Advanced Technologies Triaxial Isotropic Antenna. EMF measurements are supported in spectrum analyzer channel power mode and total field strength can be measured across the frequency band of interest.
Indoor and outdoor mapping
To verify network coverage or identify interference in any particular area, it is essential to combine receiver measurements with GPS location tags or from indoor markers. FieldFox can import maps from OpenStreetMap (OSM) for data collection and mapping to the FieldFox instrument display. The FieldFox indoor and outdoor mapping feature resides at the System level and can be enabled within the following modes:

Channel Scanner
Phased Array Antenna Support
Over-the-Air (OTA) LTE FDD/TDD
Over-the-Air (OTA) 5GTF
Maps can be saved to the FieldFox internal memory, SD card or USB drive. This can be done via a direct wired LAN connection or OSM maps can be downloaded and saved to FieldFox using the FieldFox Map Support Tool.

Vector Network Analyzer

FieldFox can be configured with VNA transmission/reflection (T/R) capability for S11 and S21 measurements, or with full 2-port capability for measurements of all four S-parameters and full 2-port calibration.
With a full 2-port network analyzer, you can measure the forward and reverse characteristics of your component without having to disconnect, turn around, and reconnect it to the analyzer. Additionally, the full 2-port calibration gives you the best measurement accuracy possible. FieldFox’s four independent, sensitive receivers provide 94 dB of dynamic range for measurement of high rejection, narrowband devices such as cavity filters. The receivers also enable full 2-port error correction with the unknown thru method, allowing users to measure non-insertable devices accurately and easily. FieldFox’s calibration engine is the same engine that powers the wellrespected Keysight ENA and PNA network analyzers. FieldFox leverages Keysight microwave expertise to deliver consistent measurements with Keysight benchtop VNAs.

Calibration
FieldFox’s guided Cal Wizard takes guessing out of calibration and allows you to easily perform the following calibrations:

• Full 2-port unknown thru
• Full 2-port QSOLT
• OSL, response, enhanced response
• TRL, LRL, offset short

Network analyzer time domain
With the time-domain option, FieldFox computes the inverse Fourier transform of the frequency-domain data to display reflection or transmission coefficients versus time. Timedomain gating can be used to remove unwanted responses such as connector mismatch or cable discontinuities, and the results can be displayed in  eithertime or frequency domain.

Waveguide support
Waveguides are widely used to provide transmission links between microwave transmitters and antennas, as waveguides have less loss than coax. Keysight offers both highperformance and also economical waveguide calibration kits. The economical kits are ideal for fieldmaintenance and troubleshooting because they provide good measurement results at a lower cost.

Vector voltmeter
Using FieldFox’s vector voltmeter (VVM), you can measure the phase shift and electrical length of a device. You can view results on the large display as far as ten feet or three meters away. VVM also provides ratio measurements of magnitude and phase of two channels, A/B or B/A. You can use this capability to verify the magnitude and phase differences between multiple signal paths such as in an antenna or phased array. FieldFox offers all the key functionalities of the HP 8508A in a handheld form factor, and without the need for the source, bridge and accessories required with the 8508A.
Mixed-mode S-parameters
With FieldFox, you can measure the common- and differential-mode reflections of a device. Mixed-mode S-parameters are also known as balanced measurements. This measurement requires the full 2-port VNA and 2-port cal functionality.

USB power sensor support
FieldFox can connect with Keysight USB power sensors to make RF and microwave power measurements. Using USB peak power sensors, you can measure both the average and the peak power of a modulated signal.
USB power measurements versus frequency
In addition to power measurements at a single CW frequency, you can measure power versus frequency – a swept measurement. FieldFox’s source frequency can be set equal to the sensor/receiver frequency, or with an offset. The frequency of both the source and receiver are swept, and the two track each other. The offset frequency can be negative, zero, or positive. This capability is useful for characterization of the scalar transmission response of devices such as mixers and converters. The FieldFox source stimulates the
DUT and the power sensor is used as the measurement receiver.

Pulse measurements
FieldFox’s pulse measurement option allows you to efficiently characterize pulsed RF signals such as those used in radar and electronic warfare systems, leveraging the Keysight USB peak power sensors. Measurements include peak power, peak to average ratio, and pulse profile parameters such as rise time, fall time and pulse repetition frequency.

Software and System Features

Remote control capability with iPad and iPhone
Engineers and technicians can now remotely monitor and control their FieldFox using their iOS device such as an iPhone, iPad, or iPod Touch. FieldFox’s Remote Viewer iOS app emulates the front panel of the unit, letting you simply press any FieldFox key right from your iOS device.
The app also allows you to instantly access technical documents such as data sheets. FieldFox’s Data Link software makes report generation and documentation easier
FieldFox’s complimentary Data Link software provides data transfer, data definition and report generation. You can add markers and limit lines to traces, and you can load cable files and antenna factors using Data Link.
Remote control via LAN and FieldFox programming
All FieldFox models can be controlled using SCPI over LAN and USB1.
Built-in variable voltage DC bias

FieldFox has a built-in variable voltage DC bias source. The DC bias source can provide DC power to amplifiers under test and bias tower mounted amplifiers (TMA) when you need to sweep through the TMA to reach the antenna (bias tees available separately).
Built-in GPS
A built-in GPS receiver provides geo- location tags to measurements. The geo data-time, latitude, longitude, and elevation-can be displayed and saved in data files. In addition to location information, the GPS provides an external reference to improve FieldFox frequency accuracy.
USB keyboard and mouse support
FieldFox supports use of USB keyboards and mice to simplify the input of text such as file names while working in the field.

Designed for You and the Work You Do Everyday

Carry FieldFox wherever you need to go

• Kit friendly at 6.6 lb. (3.0 kg) for the N991/2/3xA and 7.1 lb. (3.2 kg) for the N995/6xA
• Large buttons are easy to operate, even when wearing gloves
• Field swappable battery lasts up to hours
• Non-slip rubber grip securely fits in your hands and won’t slide off the hood of your vehicle
• Vertical “portrait” orientation makes it easy to hold and operate at the same time

Field-proof usability for better answers in less time

• Bright, low-reflection display and backlit keys enable easy viewing in direct sunlight or darkness
• Intuitive user interface is designed for your workflow, enabling measurements in fewer key presses
• One-button measurements simplify complex setups and ensure quick, accurate results with confidence
• Calibration Wizard guides user to ensure simple and accurate calibrations
• Standard three-year warranty ensures field confidence, especially in harsh environments
• 5, 7- and 10-year warranties are also available

Designed for Your Toughest Working Conditions

• Rugged enough to meet MIL-specs
• Completely sealed instrument enclosure provides measurement stability in harsh environments, -10 to +55 ºC (14 to 131 ºF)
• Specially designed to protect instrument from damage due to drops, shock or other external impacts
• Water-resistant chassis, keypad and case withstand wide temperature ranges and salty, humid environments
• Meets MIL-PRF-28800F Class 2 requirements
• Type tested and meets MIL-STD-810G, Method 511.5, Procedure I requirements for operation in explosive environments
• Type tested and meets IEC/EN 60529 requirements for ingress protection

Configuration in Brief

See the FieldFox Handheld Analyzer Configuration Guide for complete information on all FieldFox products and accessories http://literature.cdn.keysight.com/litweb/pdf/5990-9836EN.pdf.
RF and microwave analyzers are referred to as combination analyzers in this section.

30| Remote control capability| ü                                      ü ü
---|---|---
307| GPS receiver| ü                                      ü ü
309| DC bias variable-voltage source| ü                                      ü ü
Windows based software
89601B| 89600 VSA Software| ü 4 (Not on N9912A)| — ü4
N6820ES| Surveyor 4D Software| ü 4 (Not on N9912A)| — ü4

Notes:
Base model means that the functionality listed is the primary function of that instrument. For example, on the N991xA or N995xA combo analyzers, cable
and antenna analysis is the standard function included with every N991xA or N995xA.

1. Option 305 is not available on the N993xA or N996xA. However, a subset of cable and antenna analyzer measurements, return loss and VSWR, is available as Option 320.
2. Option 320 is not applicable to N991xA, N995xA, or N992xA. The reflection measurements of return loss and VSWR are included with every N991xA, N995xA, and N992xA. So, there is no need for an Option 320 on these analyzers.
3. On the N991xA or N995xA analyzers, order Options 233 and 210 to obtain a tracking generator with the spectrum analyzer. There is no Option 220 on the N991xA or N995xA analyzers. Option 233 provides the spectrum analyzer capability and Option 210 the “tracking” capability.
4. Requires CPU2 fast processor.

Specifications in Brief

See the FieldFox Data Sheet for a complete listing of the specifications at http://literature.cdn.keysight.com/litweb/pdf/5990-9783EN.pdf. Cable and antenna tester are referred to as CAT and vector network analyzer is referenced as VNA in this section.

Model| CAT and VNA frequency| Spectrum analyzer frequency 1|

Test port connectors

---|---|---|---

RF & microwave (combination) analyzers

N9913A| 30 kHz to 4 GHz| 100 kHz to 4 GHz| Type-N (f)
N9914A| 30 kHz to 6.5 GHz| 100 kHz to 6.5 GHz| Type-N (f)
N9915A| 30 kHz to 9 GHz| 100 kHz to 9 GHz| Type-N (f)
N9916A| 30 kHz to 14 GHz| 100 kHz to 14 GHz| Type-N (f)
N9917A| 30 kHz to 18 GHz| 100 kHz to 18 GHz| Type-N (f)
N9918A| 30 kHz to 26.5 GHz| 100 kHz to 26.5 GHz| 3.5 mm (m)
N9950A| 300 kHz to 32 GHz| 9 kHz to 32 GHz| NMD 2.4 mm (m)
N9951A| 300 kHz to 44 GHz| 9 kHz to 44 GHz| NMD 2.4 mm (m)
N9952A| 300 kHz to 50 GHz| 9 kHz to 50 GHz| NMD 2.4 mm (m)
Vector network analyzers| | |
N9925A| 30 kHz to 9 GHz| —| Type-N (f)
N9926A| 30 kHz to 14 GHz| —| Type-N (f)
N9927A| 30 kHz to 18 GHz| —| Type-N (f)
N9928A| 30 kHz to 26.5 GHz| —| 3.5 mm (m)
Spectrum analyzers| | |
N9935A| —| 100 kHz to 9 GHz| Type-N (f)
N9936A| —| 100 kHz to 14 GHz| Type-N (f)
N9937A| —| 100 kHz to 18 GHz| Type-N (f)
N9938A| —| 100 kHz to 26.5 GHz| Type-N (f) 2
N9960A| —| 9 kHz to 32 GHz| NMD 2.4 mm (m)
N9961A| —| 9 kHz to 44 GHz| NMD 2.4 mm (m)
N9962A| —| 9 kHz to 50 GHz| NMD 2.4 mm (m)

Notes:

1. Usable to 5 kHz.
2. Order Option 100 for 3.5 mm (m) test port connectors. With N9938A-100, the spectrum analyzer is built with 3.5 mm test port connectors instead of the standard Type-N (f). Option 100 is a prerequisite for Option 320 for N9938A.

Cable and antenna analyzer (CAT) and vector network analyzer (VNA)
The performance listed in this section applies to the cable and antenna analyzer (referred to as CAT) and vector network analyzer (referred to as VNA) capabilities.

Model| N9913/ 14/ 15/ 16/ 17/ 18A N9925/ 26/ 27/ 28A|

N9950 /51 /52A

---|---|---

Measurements

| |
CAT| Distance-to-fault (dB), return loss, VSWR, DTF (VSWR), cable loss (1 port), optional insertion loss (2 port), DTF (linear), DTF / return loss dual display
TDR cable measurements| TDR (rho), TDR (ohm), DTF / TDR
VNA T/R| S11, S21 and insertion loss
VNA full 2 port| S11, S21, S22, S12 mag and phase, VSWR, linear, phase, Smith chart, polar, group delay, unwrapped phase, real/imaginary
Calibration types| CalReady, 1-port OSL, frequency response, enhanced response, QSOLT, unknown thru 2- port, Ecal, QuickCal (not available in N995xA models)
Number of traces| 4
Number of markers| 6
Marker functions| Peak, minimum, target, bandwidth measurement with Q, marker tracking
Data points| 101, 201, 401, 601, 801, 1001 ,1601, 4001, 10,001
Frequency reference: -10 to 55 oC| |
Accuracy| ± 0.7 ppm (spec) + aging ± 0.4 ppm (typical) + aging
Accuracy, when locked to GPS| ± 0.01 ppm (spec)
Aging Rate| ± 1 ppm/year for 20 years (spec), will not exceed ± 3.5 ppm
Corrected directivity (with full 2-port calibration)| Using 85520A or 85521A cal kit|

Using 85056D cal kit

≤ 0.5 GHz| 42 dB| —
< 0.5 to 9 GHz| 36 dB| —
< 9 to 8 GHz| 32 dB| —
< 18 to 26.5 GHz| 32 dB| —
≤ 2 GHz| —| 42 dB
< 2 to 20 GHz| —| 34 dB
< 20 to 40 GHz| —| 26 dB
< 40 to 50 GHz| —| 26 dB
Model| N9913/ 14/ 15/ 16/ 17/ 18A N9925/ 26/ 27/ 28A|

N9950 /51 /52A

---|---|---

Test port output power (high power)

| |
Frequency| Typical|

Typical

| Port 1 or {ort 2|
30 to 300 kHz| -11 dBm| —

300 kHz to 2 MHz| -3 dBm| —
2 to 625 MHz| -2 dBm| —
625 MHz to 3 GHz| 1 dBm| —
3 to 6.5 GHz| -1 dBm| —
6.5 to 9 GHz| -2 dBm| —
9 to 14 GHz| -4 dBm| —
14 to 18 GHz| -6 dBm| —
18 to 23 GHz| -10 dBm| —
23 to 26.5 GHz| -12 dBm| —
| | Port 1| Port 2
300 kHz to 2 MHz| –| 0 dBm| 0 dBm
2 MHz to 1 GHz| –| 2 dBm| 2 dBm
1 to 6.5 GHz| –| 2 dBm| 0 dBm
6.5 to 18 GHz| –| 4 dBm| 1 dBm
18 to 39 GHz| –| 1 dBm| -2 dBm
39 to 46 GHz| –| -2 dBm| -5 dBm
46 to 50 GHz| –| -4 dBm| -7 dBm
Test port output power (low power)| | |
| Port 1 or port 2| |
30 kHz to 26.5 GHz| -45 dBm (flattened), nominal| –|
| | Port 1| Port 2
500 kHz to 10 MHz| –| -35 dBm| -38 dBm
10 MHz to 10 GHz| –| -38 dBm| -42 dBm
10 to 20 GHz| –| -43 dBm| -47 dBm
20 to 44 GHz| –| -44 dBm| -50 dBm
44 to 50 GHz| –| -53 dBm| -55 dBm
Power level accuracy (typical)| | |
| ± 1.5 dB at -15 dBm for frequencies > 250 kHz| ± 0.7 dB at −15 dBm, for frequencies > 500 kHz to 10 MHz
± 0.5 dB at −15 dBm, for frequencies > 10 MHz to 50 GHz
Power step size|
---|---
| Flat power, in 1 dB steps, is available across the whole frequency span (nominal)
Distance to fault|
Range| Range = velocity factor x speed of light x (number of points -1) / frequency span x 2
| Number of points auto coupled according to start and stop distance entered.
Range resolution| Resolution = range / (number of points -1)

Model

| N9913/ 14/ 15/ 16/ 17/ 18A N9925/ 26/ 27/ 28A|

N9950 /51 /52A

---|---|---

System dynamic range 1, 2 : Port 1 or Port 2, high power, 300 Hz IF bandwidth, -10 to 55 °C

Frequency| Spec| Typical| Spec| Typical

300 kHz to 9 GHz 3| 95 dB| 100 dB| —| —
9 to 14 GHz| 91 dB| 97 dB| —| —
14 to 18 GHz| 90 dB| 94 dB| —| —
18 to 20 GHz| 87 dB| 90 dB| —| —
20 to 25 GHz| 74 dB| 79 dB| —| —
25 to 26.5 GHz| 65 dB| 70 dB| —| —
300 kHz to 1 MHz| —| —| —| 70 dB (nominal)
1 to 10 MHz| —| —| —| 100 dB (nominal)
10 MHz to 20 GHz 4| —| —| 100 dB| 110 dB
20 to 44 GHz 5| —| —| 90 dB| 100 dB
44 to 50 GHz 6| —| —| 81 dB| 90 dB

Trace noise 7 : Port 1 or Port 2, high power, 300 Hz IF bandwidth, spec, -10 to 55 °C

Frequency| | Magnitude/Phase (dB rms/deg rms)|

300 kHz to 20 GHz| | ± 0.004 / ± 0.070|
20 to 26.5 GHz| | ± 0.007/ ± 0.140|
26.5 to 32 GHz| | ± 0.007/ ± 0.140|
32 to 50 GHz| | ± 0.008 / ± 0.220|
IF Bandwidth 8| | | |
Bandwidth| 10 Hz, 30 Hz, 100 Hz, 300 Hz, 1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz

1. System dynamic range is measured in production with loads on test ports after thru normalization, test port output power high.
2. For CAT mode, “Insertion loss (2-port)”, decrease listed dynamic range specifications by 20 dB, as CAT mode IFBW is fixed at 10 kHz. Can obtain full dynamic range by using S21 measurement in VNA mode with 100 Hz IFBW.
3. < 300 kHz: 63 dB nominal; 2 MHz to 9 MHz: 85 dB spec, 90 dB typical.
4. Decrease by 3 dB between 15 to 15.8 GHz.
5. Decrease by 5 dB between 21.7 to 22.1 GHz
6. Decrease by 4 dB between 44 to 50 GHz For CAT mode, increase trace noise by a factor of 5.7, as CAT mode IFBW is fixed at 10 kHz. Can use averaging in CAT mode to reduce trace noise or use VNA mode with 300 Hz IFBW.
7. VNA mode only. Recommend using averaging in CAT mode.

Spectrum analyzer

The performance listed in this section applies to the spectrum analyzer capabilities.

Model| N9913 /14 /15 /16 /17 /18A N9935 /36 /37 /38A|

N9950 /51 /52A N9960 /61 /62A

---|---|---
Measurements| | | |
Spectrum analyzer| Spectrum, channel power, adjacent power, occupied bandwidth, analog demodulation, tune and listen
Number of traces| | Same as network analyzer (see page 31)|
Number of markers| | Same as network analyzer (see page 31)|
Interference analysis| Spectrogram, waterfall and record/playback|
Input attenuator range| | 0 to 30 dB, in 5 dB steps|
Frequency span| | Resolution: 1 Hz|
Frequency reference: -10 to 55 °C| | Same as network analyzer (see page 31)|
Preamplifier| The preamplifier covers the full-band with nominal gain of 20 dB
Tracking generator| Built in, full-band based on the model maximum frequency

Resolution bandwidth (RBW), range (-3 dB bandwidth)

Zero span: 10 Hz to 5 MHz: 1, 3, 10 sequence
Non-zero span: 1 Hz to 5 MHz: 1, 1.5, 2, 3, 5, 7.5, 10 sequence
Video bandwidth (VBW)| | | |
1 Hz to 5 MHz in 1, 1.5, 2, 3, 5, 7.5, 10 sequence

Phase noise: Stability, SSB phase noise at 1 GHz

Offset| Spec (23 ± 5 ºC)| Typical (23 ± 5 ºC)
10 kHz| -106 dBc| | -111 dBc
30 kHz| -106 dBc| | -108 dBc
100 kHz| -100 dBc| | -104 dBc
1 MHz| -110 dBc| | -113 dBc
3 MHz| -119 dBc| | -122 dBc
5 MHz| -120 dBc| | -123 dBc

50 MHz absolute amplitude accuracy (dB)

0 dB attenuation, peak detector, preamplifier off, 300 Hz RBW, all settings auto-coupled. No warm-up required.

| Input signal 0 to -35 dBm|

Input signal -5 to -35 dBm

| Spec (-10 to 55 ºC)| Typical (-10 to 55 ºC)| Spec (-10 to 55 ºC)| Typical (-10 to 55 ºC)
| ± 0.30 dB| ± 0.10 dB| ± 0.45 dB| ± 0.20 dB

Total absolute amplitude accuracy Temperature (23 ± 5 ºC)

10 dB attenuation, input signal -10 to -5 dBm, peak detector, preamplifier off, 300 Hz RBW, all settings auto-coupled, includes frequency response uncertainties. No warm-up required.

| Spec| Typical| Spec|

Typical

100 kHz to 18 GHz| ± 0.8 dB| ± 0.35 dB| –| –

18 to 26.5 GHz| ± 1.0 dB| ± 0.5 dB| –| –
9 to 100 kHz| –| –| ± 1.6 dB| ± 0.6 dB
100 kHz to 2 MHz| –| –| ± 1.3 dB| ± 0.6 dB
2 MHz to 32 GHz| –| –| ± 0.8 dB| ± 0.3 dB
32 to 40 GHz| –| –| ± 0.9 dB| ± 0.5 dB
40 to 43 GHz| –| –| ± 1.3 dB| ± 0.5 dB
43 to 50 GHz| –| –| ± 1.4 dB| ± 0.5 dB
Model| N9913 /14 /15 /16 /17 /18A N9935 /36 /37 /38A|

N9950 /51 /52A N9960 /61 /62A

---|---|---

Displayed average noise level (DANL): RMS detection, log averaging, reference level of -20 dBm, normalized to 1 Hz RBW

Preamp on (23 ± 5 ºC)

| Spec| Typical| Spec|

Typical

2 MHz to 4.5 GHz 1| -153 dBm| -155 dBm| —| —

4.5 to 7 GHz| -149 dBm| -151 dBm| —| —
7 to 13 GHz| -147 dBm| -149 dBm| —| —
13 to 17 GHz| -143 dBm| -145 dBm| —| —
17 to 22 GHz| -140 dBm| -143 dBm| —| —
22 to 25 GHz| -134 dBm| -137 dBm| —| —
25 to 26.5 GHz| -128 dBm| -131 dBm| —| —
9 kHz to 2 MHz| —| —| -94 dBm| -131 dBm
2 MHz to 2.1 GHz| —| —| -153 dBm| -159 dBm
2.1 to 2.8 GHz| —| —| -151 dBm| -157 dBm
2.8 to 4.5 GHz| —| —| -153 dBm| -158 dBm
4.5 to 7 GHz| —| —| -150 dBm| -156 dBm
7 to 13 GHz| —| —| -146 dBm| -152 dBm
13 to 22 GHz| —| —| -142 dBm| -149 dBm
22 to 35 GHz| —| —| -141 dBm| -147 dBm
35 to 40 GHz| —| —| -136 dBm| -144 dBm
40 to 46 GHz| —| —| -131 dBm| -138 dBm
46 to 50 GHz| —| —| -126 dBm| -135 dBm
Third order intermodulation distortion (TOI)
Two -20 dBm signals, 100 kHz spacing at input mixer, – 10 to 55 °C

Spec

| Typical| Spec| |

Typical

At 2.4 GHz, +15 dBm| < 1 GHz, +10 dBm| At 2.4 GHz, +15 dBm| 50 to 500 MHz, +9.5 dBm
—| 1 to 7.5 GHz, +15 dBm| —| > 500 MHz to 1 GHz, +13 dBm
—| > 7.5 GHz, +21 dBm| —| > 1 to 2.4 GHz, +16 dBm
| | —| > 2.4 to 2.6 GHz, +12 dBm
| | —| > 2.6 GHz, +13 dBm

Real-time spectrum analyzer (RTSA)

Model Real-time analysis| N9913 /14 /15 /16 /17 /18A N9935 /36 /37 /38A| N9950 /51 /52A N9960 /61 /62A
---|---|---
Maximum real-time bandwidth| 10 MHz
Resolution bandwidth| 1 Hz to 500 kHz
Minimum signal duration with 100% probability of intercept (POI) at full amplitude accuracy| 12 µs
Minimum detectable signal| 22 ns
Spurious-free dynamic range across maximum BW| 63 dB
FFT rate| 120,000 FFT/s (at 10 MHz span)
Min. acquisition time| 20 ms (at 10 MHz span)
Max. acquisition time| 500 ms (at 10 MHz span)
Traces
Traces|
---|---
| Number of traces| 4: all four can be active simultaneously and in different states
Detectors| Normal, positive peak, negative peak, sample, average (RMS)
States| Clear/write, max. hold, min. hold, average, view, blank
Markers|
Number of markers| 6
Type| Normal, delta, peak
Marker .| Peak, next peak, center frequency, reference level, minimum
Trigger|
Trigger type| Free run, external video, RF burst, periodic

Analysis bandwidth1, 2

Model| N9913 /14 /15 /16 /17 /18A N9935 /36 /37 /38A| N9950 /51 /52A N9960 /61 /62A
---|---|---
| Typical 3| Typical 3
Maximum bandwidth| | 10 MHz
IF flatness| Magnitude| ± 0.2 dB| ± 0.2 dB ≤ 26.5 GHz,
± 0.3 dB > 26.5 GHz
| Phase deviation from linearity 4| 2.3° peak-to-peak,
1.6° rms| 2.6° peak-to-peak, 1.8° rms
| Group delay flatness (peak-to-peak) 4| 11 ns
EVM (at center frequency 1 GHz)| LTE-A FDD TM3.1 (10 MHz)| 0.8%| 0.7%
WCDMA TM4 (5 MHz)| 0.8%| 0.85%
EVM (at center frequency 2.1 GHz)| LTE-A FDD TM3.1 (10 MHz)| 1%| 1.1%
WCDMA TM4 (5 MHz)| 1.1%| 1.2%

1 Analysis bandwidth is the instantaneous bandwidth available around a center frequency over which the input signal can be digitized for further analysis or processing in the time, frequency, or modulation domain.
2 Analysis bandwidth capability supported with I/Q analyzer mode and 89600 VSA Software.
3 These numbers were generated from the room temperature (23º C).
4 Not guaranteed below 50 MHz

General information

Model| N9913 /14 /15 /16 /17 /18A N9925 /26 /27 /28A N9935 /36 /37 /38A| N9950 /51 /52A N9960 /61 /62A
---|---|---
Weight| 3.0 kg or 6.6 lb. including battery| 3.2 kg or 7.1 lb. including battery
Dimension H x W x D| 292 x 188 x 72 mm (11.5″ x 7.4″ x 2.8″)
Battery| Lithium ion, 10.8 V, 4.6 A-h, 3.5 hours (typical)
Calibration cycle| 1 year
Warranty| 3-year warranty standard on all FieldFox instruments
Environmental
MIL-PRF-28800F Class 2| Operating temperature, storing temperature, storing temperature, operating humidity, random vibration, functional shock, bench drop
---|---
MIL-STD-810G, Method 511.5| This product has been type tested to meet the requirements for operating in explosive environments in accordance with MIL- STD-810G, Method 511.5, Procedure 1.
Ingress protection| This product has been type tested to meet the requirements for ingress protection IP53 in accordance with IEC/EN 60529 (IP rating for instrument by itself with no cover).
Complies with European EMC directive| IEC/EN 61326–1 CISPR Pub 11 Group 1, Class B, Group 1 limit of CISPR 11:203/EN 55011:2007 AS/NZS CISPR 11
ICES/NMB–001

Accessories in Brief

See the FieldFox Configuration Guide for a comprehensive list of accessories http://literature.cdn.keysight.com/litweb/pdf/5990-9836EN.pdf
RF and microwave accessories

RF and microwave accessories

Cables

N9910X-709| Phase stable cable (3.5 mm (f) to 3.5 mm (f), 26.5 GHz, 3.28 ft or 1 m)
N9910X-810| Phase stable cable (Type-N (m) to Type-N (m), 6 GHz, 5 ft or 1.5 m)

Calibration kits

N9910X-800| 3-in- OSL calibration kit (DC to 6 GHz, Type-N (m) 50 ohm)
85520A| 4-in-1 OSLT calibration kit (DC to 26.5 GHz, 3.5 mm (m) 50 ohm)
N4690C| Electronic calibration module (ECal), 300 kHz to 18 GHz, Type-N, 50 ohm, 2-port
85056A| Mechanical calibration kit, DC to 50 GHz, 2.4 mm
85056D| Economy mechanical calibration kit, DC to 50 GHz, 2.4 mm

Antennas

N9910X-820| Directional antenna (multiband 800 MHz to 2.5 GHz, 10 dBi, Type-N (f))
N9910X-821| Telescopic whip antenna (70 MHz to 1 GHz, 10 dBi, BNC (m))

Preamplifiers

U7227A USB Preamplifier, 10 MHz to 4 GHz| www.keysight.com/find/U7227A
U7227C USB Preamplifier, 100 MHz to 26.5 GHz| www.keysight.com/find/U7227C
U7227F USB Preamplifier, 2 to 50 GHz| www.keysight.com/find/U7227F
U7228A USB Preamplifier, 10 MHz to 4 GHz| www.keysight.com/find/U7228A
U7228C USB Preamplifier, 100 MHz to 26.5 GHz| www.keysight.com/find/U7228C
U7228F USB Preamplifier, 2 to 50 GHz| www.keysight.com/find/U7228F

Noise sources

346A/B/C/K01/K40 Noise Source Family| www.keysight.com/find/346noisesources

346A/B/C/K01/K40 Noise Source Family www.keysight.com/find/346noisesources
Download application notes, watch videos, and learn more: www.keysight.com/find/fieldfox

Carry Precision with You

Every piece of gear in your field kit had to prove its worth. Measuring up and earning a spot is the driving idea behind Keysight’s FieldFox analyzers. They’re equipped to handle routine maintenance, in-depth troubleshooting and anything in between. Better yet, FieldFox delivers precise microwave and millimeter-wave measurements- wherever you need to go. Add FieldFox to your kit and carry precision with you.

Download application notes, watch videos, and learn more: www.keysight.com/find/fieldfox
Learn more at:www.keysight.com
For more information on Keysight Technologies’ products, applications or services, please contact your local Keysight office. The complete list is available at: www.keysight.com/find/contactus

Find us at www.keysight.com
This information is subject to change without notice. © Keysight Technologies, 2012 – 2021, Published in USA, November 1, 2021, 5992-0772EN

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