mimomax Pyxis Radios Sophisticated Data Compression User Manual

mimomax Pyxis Radios Sophisticated Data Compression

Pyxis Product Manual

Specifications

• FCC ID : XMK-MMXPYXH002

Disclaimer
This document contains proprietary information and must not be provided or copied to third parties without express permission from Mimomax Wireless Ltd. While precaution has been taken in the preparation of this literature and it is believed to be correct at the time of issue, Mimomax Wireless Ltd assumes no liability for errors or omissions or for any damages resulting from the use of this information. Due to a policy of continuous technical improvement, the contents of this document and any specifications contained therein are subject to revision and may change without notice.

Warranty
Mimomax Wireless Limited (Mimomax) warrants for a period of 12 months from the date of delivery that its hardware items (Equipment) will be free from defects due to defective design, workmanship, or materials subject to the conditions below (Warranty).

Conditions of Warranty
This Warranty is strictly subject to the following conditions

1. Mimomax will not be liable for breach of Warranty unless the customer
   • Notifies Mimomax of the alleged defects within 30 days after the defect would have become reasonably apparent
   • Promptly returns the Equipment carriage paid with a full written report on the alleged defects
2. The Warranty is not transferable.
3. Mimomax’s liability under this Warranty is dependent on an assessment by Mimomax to determine and validate the defect in design, workmanship, or materials.
4. The customer shall refund to Mimomax the cost to Mimomax of any replacement, repair, or redelivery of any Equipment affected by Mimomax where the failure is not within the terms of this Warranty.
5. Mimomax does not guarantee that any service performed under this Warranty will be carried out within any particular timeframe.
6. To the fullest extent permitted by law, Mimomax’s liability under this Warranty is limited to (at Mimomax’s option) replacing or repairing the Equipment or the relevant part thereof without charge provided that its liability shall in no event exceed the purchase price of the Equipment or the relevant part thereof. Where Mimomax authorizes the customer to undertake Warranty repairs, no reimbursement will be made in respect of labor.

General Exclusions
Mimomax shall not be liable under this Warranty

• Where the Equipment has not been stored, installed, maintained, and used properly having regard, in particular, to Mimomax’s and (if any) other agreed applicable specifications and instructions including (without limitation) in relation to the installation of engineering changes or enhancements.
• Where the Equipment has not been used in accordance with interference-free power, suitable environment (including but not limited to free from electronic or radio interference and pests), and correct maintenance of the Equipment.
• For third party interference, fair wear and tear, abuse, damage or misuse, correction or repairs or modifications made other than by Mimomax or any repairs required due to events beyond the control of Mimomax.

Product Usage Instructions

Storage
Ensure that the Equipment is stored in a suitable environment free from electronic or radio interference and pests. Refer to the product manual for specific storage instructions.

Installation
Follow the installation instructions provided in the product manual. Pay attention to any engineering changes or enhancements mentioned.

Maintenance
Maintain the Equipment according to the recommended maintenance schedule outlined in the product manual. This includes regular cleaning and inspection of components.

Troubleshooting
If you encounter any issues with the Equipment, refer to the troubleshooting section in the product manual. Follow the recommended steps to identify and resolve the problem.

FAQ

• Q: Is the Warranty transferable?
  A: No, the Warranty is not transferable.

• Q: What should I do if I notice a defect in the Equipment?
  A: Notify Mimomax of the alleged defects within 30 days after the defect would have become reasonably apparent. Promptly return the Equipment carriage paid with a full written report on the alleged defects.

• Q: What is the warranty period for the Equipment?
  A: The warranty period for the Equipment is 12 months from the date of delivery.

PYXIS PRODUCT MANUAL

Issue 2 –2023
This document contains proprietary information and must not be provided or copied to third parties without express permission from Mimomax Wireless Ltd

• FCC ID :XMK-MMXPYXH002

Mimomax Wireless Ltd Issue 2 –2023

Pyxis Product Manual

Disclaimer
While precaution has been taken in the preparation of this literature and it is believed to be correct at the time of issue, Mimomax Wireless Ltd assumes no liability for errors or omissions or for any damages resulting from the use of this information. Due to a policy of continuous technical improvement, the contents of this document and any specifications contained therein are subject to revision and may change without notice.

WARRANTY

Mimomax Wireless Limited (“Mimomax”) warrants for a period of 12 months from the date of delivery that its hardware items (“Equipment”) will be free from defects due to defective design, workmanship or materials subject the conditions below (“Warranty”).

CONDITIONS OF WARRANTY
This Warranty is strictly subject to the following conditions

• Mimomax will not be liable for breach of Warranty unless the customer (i) notifies Mimomax of the alleged defects within 30 days after the defect would have become reasonably apparent, and (ii) promptly returns the Equipment carriage paid with a full written report on the alleged defects.
• The Warranty is not transferable.
• Mimomax’s liability under this Warranty is dependent on an assessment by Mimomax to determine and validate the defect in design, workmanship or materials.
• The customer shall refund to Mimomax the cost to Mimomax of any replacement, repair or redelivery of any Equipment effected by Mimomax where the failure is not within the terms of this Warranty.
• Mimomax does not guarantee that any service performed under this Warranty will be carried out within any particular timeframe.
• To the fullest extent permitted by law, Mimomax’s liability under this Warranty is limited to (at Mimomax’s option) replacing or repairing the Equipment or the relevant part thereof without charge provided that its liability shall in no event exceed the purchase price of the Equipment or the relevant part thereof. Where Mimomax authorises the customer to undertake Warranty repairs, no reimbursement will be made in respect of labour.

GENERAL EXCLUSIONS
Mimomax shall not be liable under this Warranty

• where the Equipment has not been stored, installed, maintained and used properly having regard in particular to Mimomax’s and (if any) other agreed applicable specifications and instructions including (without limitation) in relation to the installation of engineering changes or enhancements;
• where the Equipment has not been used in accordance with interference-free power, suitable environment (including but not limited to free from electronic or radio interference and pests) and correct maintenance of the Equipment;
• for third party interference, fair wear and tear, abuse, damage or misuse, correction or repairs or modifications made other than by Mimomax or any repairs required due to events beyond the control of Mimomax;
• for abnormal conditions (electrical, thermal, chemical or otherwise), including (without limitation) factors outside the operational parameters for the Equipment;
• for any defect caused by or arising from use of any software not licensed or supplied by Mimomax, or otherwise caused by or arising from the customer’s acts or omissions

LIMITATION OF LIABILITY
Except as set out in this Warranty and to the maximum extent permitted by law

• all warranties, conditions, liabilities and obligations with respect to any Mimomax product, software or services (including as to merchantability, description quality, or fitness for a specific purpose) are expressly excluded; and
• Mimomax shall not be liable for any losses or damages (whether direct or indirect) including property damage or personal injury, consequential loss, economic loss or loss of profits or other economic advantage, however caused which may be suffered or incurred by the customer or any third person, or which may arise directly or indirectly out of or in respect of any Mimomax product, software or services or by reason of any act or omission on the part of Mimomax.

CUSTOMER ACKNOWLEDGEMENT
The customer acknowledges that

• if the Consumer Guarantees Act 1993 (“CGA”) applies, this Warranty shall be read subject to customer’s rights under the CGA. Where the customer uses the Equipment for business purposes, the provisions of CGA, or any other relevant consumer protection legislation, shall not apply;

• the Equipment is not designed or intended for use in on-line control of aircraft, air traffic, aircraft navigation or aircraft communications; intrinsically safe environments or in the design, construction, operation or maintenance of any nuclear facility. Mimomax disclaims any express or implied warranty of fitness for such uses. The customer will not use or resell
  Equipment for such purposes;

• any software supplied by Mimomax cannot be tested in every possible permutation and accordingly Mimomax does not warrant
  that software supplied will be free of all defects or that its use will be uninterrupted.

Conventions used in this manual

• This indicates the following information is for reference purposes.
• This indicates the following information is important and the user MUST take note.

PYXIS SYSTEM OVERVIEW

• To complement Mimomax’s Tornado range of radios or as a standalone radio, the Pyxis radio system provides a low-cost, high-performance radio platform. When used with Tornado radios, Pyxis radios provide Tier 2 network connectivity from a selected set of Tier 1 Tornado remote locations to end points in the near vicinity. This is achieved by having Pyxis bases (BRU-P) co-located with Tier 1 Tornado remote radios (RRU-T) and connected via a wired Ethernet connection. Pyxis BRU-P’s provide a wireless connection to a number of Pyxis remotes (RRU-P) that in turn provide connectivity via RTUs at a variety of plant types, including Advanced Solar Inverters. (The Pyxis radios operate within the same 2 x 1MHz blocks of 700 MHz spectrum as used by the Tier 1 network, although typically within 6-8 channels set aside for the Tier 2 operation). The Pyxis radios utilize two-frequency TDD, and to facilitate relay operation, can switch between transmit in either the upper or lower MHz block.
• Operating in 757-788MHz Licensed Spectrum, Pyxis provides an economical solution to your SCADA needs, utilizing PTP/PTMP tree structures to connect to devices at the periphery of your network.

TYPICAL TIER 2 PYXIS NETWORK

MULTIPOINT DIGITAL LINKS (MDL)

• The Mimomax Pyxis MDL is a highly reliable and robust point-to-multipoint wireless linking solution designed for mission-critical Supervisory Control and Data Acquisition (SCADA) and Telemetry applications. It consists of one or more Base Radio Units (BRUs) that support up to 125 Remote Radio Units (RRUs).
• The Mimomax MDL supports both native IP and legacy Asynchronous Serial RS232 Remote Terminal Units (RTUs) by means of optional embedded Terminal Server software. A number of interfaces are available to support various applications.
• Very high system gains, and good receiver sensitivities mean that it is possible to achieve paths in excess of 100km from high radio sites at full speed.
• SCADA networks can use MDL links to connect remote RTUs to the central SCADA master.

SCADA Network Example

SAFETY WARNINGS

MODIFICATIONS

NOTE : THE GRANTEE IS NOT RESPONSIBLE FOR ANY CHANGES OR MODIFICATIONS NOT EXPRESSLY APPROVED BY THE PARTY RESPONSIBLE FOR COMPLIANCE. SUCH MODIFICATIONS COULD VOID THE USER’S AUTHORITY TO OPERATE THE EQUIPMENT.

• SAFETY DISTANCE

  • Minimum Safe Distance from Antenna: To comply with safety requirements for human RF exposure in the USA, Canada and other countries, no person shall be permitted to remain in the vicinity of the antenna of an operational Mimomax Pyxis system at distances closer than the following
  • General Public / Uncontrolled Use: 0.25m when using an 4dbi Omni Antenna with a Mimomax 700MHz Pyxis radio.
    The above distances are based on procedures defined by regulatory standards for equipment operating at maximum power and 100% duty cycle with a person located directly in front of the antenna in the main radiation lobe.

• FCC RADIATION EXPOSURE STATEMENT
  The transmitter must not be co-located or operated in conjunction with any other antenna or transmitter. The equipment complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 72cm between the radiator and any part of your body.

• ELECTRICAL SAFETY CABLE SCREENING
  Equipment connected to the protective earthing of the building installation through the mains connection or through other equipment with a connection to protective earthing – and to a cable distribution system using coaxial cable, may in some circumstances create a fire hazard. Connection to a cable distribution system has therefore to be provided through a device providing electrical isolation below a certain frequency range (galvanic isolator, see EN 60728-11).

MAINS CONNECTION
The Mains connection of the supply providing the DC supply to the Mimomax Pyxis unit shall be either

• PERMANENTLY CONNECTED EQUIPMENT.
• PLUGGABLE EQUIPMENT TYPE B.
• Or equipment intended to be used in a RESTRICTED ACCESS LOCATION where equipotential bonding has been applied and which has provision for a permanently connected PROTECTIVE EARTHING CONDUCTOR and is provided with instructions for the installation of that conductor by a SERVICE PERSON.

FCC 15.19 STATEMENT
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

FCC 15.105(B) STATEMENT

Note : This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. — Consult the dealer or an experienced radio/TV technician for help.

Federal Communication Commission (FCC) Radiation Exposure Statement
When using the product, maintain a distance of 72cm from the body to ensure compliance with RF exposure requirements.

PYXIS RADIO UNIT OVERVIEW

Mimomax Pyxis radios consist of the following modules.

• Digital Processing System (DPS)
• Transceiver (TRCVR)

These modules are described in detail in the sections that follow.

• User data (Ethernet or serial) passes from the various interfaces into the Digital Processing System (DPS) where sophisticated processing takes place to code the data into frames for transmission.
• The transceiver generates the transmit signal and amplifies it to the set power level. On the receive path, the radio signals are picked up by the antenna and into the receiver module. The receiver selects the radio frequency to receive and mixes the signal down to and IF. This IF signal is then demodulated, and frames are reconstructed into the user data.

DIGITAL PROCESSING SYSTEM
The DPS is the heart of the radio unit. It provides an accurate and stable 40MHz system reference clock from which all the required digital clocks and RF local oscillator frequencies for transmit and receive functions are derived. It processes signals that have been transmitted or received and provides overall control and monitoring to the rest of the system via the built-in Configuration, Control and Management Software CCMS and Command Line Interface, CLi software. Power supplies are also provided by the DPS.

POWER SUPPLY
The power supply operates off a 10.5 to 60 VDC input and generates stable 11.5V, 5.5V, 5.0V, 3.3V, 2.5V,1.8V 1.2V and 23V internal power supply rails, that all the other circuitry runs off. The input of the power supply is isolated from the rest of the circuitry and the chassis. Input voltage monitoring is provided via the CCMS and CLi interfaces.

• CENTRAL PROCESSOR UNIT

  • An ARM Cortex A8 based microcontroller is used as the CPU in the DPS board. It uses a reference clock of 26MHz. The CPU provides external device connectivity through the built-in and external peripherals.
  • The CPU runs a Linux embedded operating system which provides various services such as scheduling, process management, memory management, device and resource management, TCP/IP stacks and inter-networking, applications, user interface, system configuration and control etc. An integral part of the Linux operating system is the Mimomax specific network driver, which configures the radio unit as a standard Ethernet device.

• FPGA

  • An Altera Cyclone IV Field Programmable Gate Array is used to implement the radio interface.

• REFERENCE & CLOCK SYNTHESISERS

  • The main system reference clock consists of a low-noise, voltage-controlled, temperature-compensated, crystal oscillator (VCTCXO) operating at 40MHz. Factory calibration of this oscillator against an external GPS or other frequency reference is provided by means of a DAC which adjusts the VCTCXO DC control voltage to set the frequency precisely to 40.0MHz. The VCTCXO may also be phase-locked to an external 10 MHz reference if required. If the external reference input is not in use the internal reference divided down to 10 MHz can be provided as an output. External reference in/out is provided via an isolated differential connection on the GPIO connector.
  • The 40MHz output from the VCTCXO is buffered and distributed to provide low-noise differential reference signals for the transmitter and receiver local oscillators and the FPGA.
  • The 40MHz output from the VCTCXO also feeds a PLL IC which generates a 25MHz clock for the Ethernet controller.

• DUAL ETHERNET
  The Ethernet is provided via a three-port managed Ethernet switch, one port is the internal connection to the CPU, and the other two ports are available on the RJ45 connectors labelled ‘Eth1’ and ‘Eth2’ on the front panel. The Ethernet ports are both 10/100BASE-Tx ports, supporting full and half duplex, flow control, auto MDI-X and auto negotiation.

• DUAL SERIAL
  The two serial ports, ‘Serial 1’ and ‘Serial 2’ on the front panel, operate as RS232 or RS485 ports.

• GPS/SERIAL CONSOLE
  The GPS port here can be configured as either GPS input ports or RS232 serial port.

• GPIO
  Four GPIO ports are provided, these are able to be open collector digital outputs capable of withstanding 70 VDC and sinking up to 100mA. Or they can be used as either digital or analogue input ports, making use of a 12-bit Analogue to Digital converter. The direction and mode of each can be set independently.

• ALARM
  A single set of voltage free change over contacts are provided as an alarm indication, these are current limited to 750mA. The alarm port is also on the GPIO connector.

• FRONT PANEL LEDS
  LEDs on the front panel indicate Power, RF link status and Alarm.

RECEIVER RF/IF SECTIONS
The receiver line up consists of one RF, mixer, IF and backend transceiver IC stage and shares the front end LPF and RF connector with the transmitter section, which works in TDD mode. RF input to the receiver is by means of the radio front panel-mounted 50Ω SMA connector and through the build in LPF, which gives rejection to the image signals. A LPF placed after a RF switch distributes the input RF signal to the receiver front end in the receiving time slot and outputs the transmitter RF signal to the antenna in the transmitting time slot alternatively. A specific synthesizer and local oscillator feeds the Rx mixer. Descriptions below set forth the details of receiver stages.

FRONT END
The receiver Front End consists of a RF saw filter, LNA and post-LNA bandpass filter. Incoming signals are fed through two switchable RF saw filters, which have band pass response centred at the low and high frequency bands that the Pyxis radio operates at. The saw filters provide effective rejection of out- of-band frequencies beyond the centre frequency (approximately +/-3MHz). Following the filter, is the receiver Low Noise Amplifier (LNA). This is followed by a fixed image reject filter (band pass filter) to remove noise attributed to the LNA as the majority of image rejection comes from the front end.

MIXER AND LO BUFFER
The RF signal from the front end is converted down to an Intermediate Frequency (IF) by means of a mixer and LO Buffer.

IF AND BACKEND TRANSCEIVER IC
The signal from the mixer directly feeds an IF amplifier. It passes to a 169.2MHz IF SAW filter which has a 70KHz pass band and gives sufficient rejection to out-of-band signals beyond the centre frequency +/- 100KHz. The primary rejection of adjacent channels is provided by a programmable DSP channel filter in the backend transceiver IC further down the receive chain.
Following the IF filter, a single to balance converter circuit feeds the IF signal to an integrated transceiver IC that has a built in IF amplifier, AGC stage, internal 2nd LO, ADC and baseband digital signal processor, which eventually demodulate the received signal to user data.

RECEIVER LOCAL OSCILLATOR

• The receiver local oscillator consists of a programmable fractional-N phase-locked loop (PLL) frequency synthesiser, using a stable reference frequency from an internal 40MHz temperature-compensated crystal oscillator located on the digital PCB. The required local oscillator frequency (i.e. receive frequency minus 169.2MHz) is programmed by the units central processing system which controls the synthesiser via a 3-wire serial interface bus. The frequency is settable in 5 kHz increments (2.5KHz is optional).
• The synthesiser control loop incorporates a low noise op-amp active filter and level shifter, the output of which feeds the voltage-controlled oscillator (VCO). The VCO uses a LC resonator tuned by a high-Q varicap diodes to minimise phase noise and jitter. The required local oscillator frequency ranges from 587.8MHz to 618.8MHz.
• The output of the VCO passes through an RF cascade buffer IC, which amplifies the low-level signal from the VCO whilst providing high reverse isolation to minimise any variations in VCO loading. The output feeds the receiver mixer.

TRANSMITTER RF/IF SECTIONS
The transmitter line up consists of an IF transceiver IC, up converter mixer, band pass filter, channel SAW filter, buffer IC, stepped attenuator and RF PAs stages. The stepped attenuator settings are controlled by software via a DAC chipset to achieve user configured RF power levels. A transmitter specific PLL synthesizer and local oscillator feeds the mixer to up convert the IF signal from the transceiver IC to RF. The RF signal is then amplified by the PA stages and fed to a LPF through the T/R switch and output to the SMA antenna connector.

FORWARD SIGNAL PATH
The transmitter employs a fixed frequency ‘direct IF’ from the backend transceiver IC, and with a single up conversion to the final RF. Following the mixer, a 9th order bandpass filter rejects most of the wide span spurious signals including the image and high order mixing products. Two switchable RF SAW filters based on the RF frequency give additional rejection to the close band spurious signals. The adjustment of transmitter gain is provided by a 4.0 – 36.0dB stepped attenuator programmable in 0.2dB steps. Power amplification follows consisting of devices biased to provide a class AB type amplifier for 4GFSK modulation in TDD mode. After the LPF, a directional coupler on the output provides a sample of the forward and reverse signal to two log type RF detectors respectively. The PA bias is controlled via DAC outputs that are programmed by a software control loop, which tracks the PA temperature and compensates the biased current over temperature. An ADC channel measures the driver and final PA temperature by a temperature sensor placed close to the PA. Another two ADC channels monitor the forward and reverse power by sampling the output of RF sensors. A software power control loop tracks the power and adjusts the step attenuator in real time to maintain a constant RF power level over varying conditions. Power reduction is introduced automatically by the power control loop to prevent the transmitter devices being damaged when the radio is meeting high VSWR or the PA temperature is measured higher than a predefined limit (typically 90 Deg C) in extreme conditions.

TRANSMITTER LOCAL OSCILLATOR

• The transmitter local oscillator is identical to the receiver LO. The required local oscillator frequency (i.e. transmit frequency minus TX IF) is programmed via a serial interface bus from the CPU on the digital board. The LO frequency can be set in 5 kHz increments (2.5KHz is optional).
• The output of the VCO passes through an RF cascade buffer IC, which amplifies the low-level signal from the VCO whilst providing high reverse isolation to minimise any variations in the VCO loading. The output feeds the transmitter mixer.
• The diagram below describes each of the different connectors and functionality.

Warning: Do not power up the radio unit without a load (attenuator or antenna) connected to antenna connection. Damage to the radio may occur otherwise.

POWER REQUIREMENTS

VOLTAGE RANGE
The operating input voltage range of the power supply is 10.5 to 60 VDC. This means that the voltage must not rise above 60 VDC under idle conditions or fall below 10.5 VDC at full load.

STATIC POWER PER INPUT
The typical power drawn when the transmitter is active is about 6W at 50% duty cycle or 9W at 100% duty cycle. The power drawn via the internal switching regulators is nearly independent of supply voltage, except for some additional converter loss at the top end of the voltage range, so that the input current to the RU is almost inversely proportional to supply voltage, e.g. approximately 2.4A at 10.5V or 0.5A at 56V This needs to be considered when the power source is remote from the RU and cable loss is a factor.

STARTING CURRENT
As long as the power supply can supply the static power it should be able to provide sufficient current during start-up.

SUPPLY POLARITY (ISOLATED POWER SUPPLY)
Both the positive and negative connections of the power supply are isolated from the case and other circuitry. The power cable is wired to pin 1 (positive) and Pin 2 (negative) of each connector, which employs screw terminal contacts.

GROUNDING
The radio unit case must be grounded through an external earth strap. Any of the unused mounting screw points can be used with an appropriate star washed. Generally, this is done to the local rack frame, which in turn should be part of a well-designed station grounding system. This internal grounding is designed for EMC and transient protection currents.

• SUPPLY NOISE
  Regardless of the EMC provisions in the equipment, power wiring from the DC source should not be shared with other equipment that may introduce excessive noise. Nor should the power cables to the unit be run alongside cables that connect to other equipment that may produce high current noise or transients, e.g. power relays.

• OPERATING FROM AC MAINS
  AC-DC ‘desktop’ power supplies are available from Mimomax with the required power.

• ETHERNET 1 AND 2
  Two shielded RJ45 sockets provide the Ethernet connections to ethernet 1 and

2. Ethernet 1 has POE (Power Over Ethernet) support and is compatible with IEEE802.3AT. Shielded cable is not normally required. The Ethernet ports are both 10/100BASE-Tx ports, supporting full and half duplex, flow control, auto MDI-X and auto negotiation.

SERIAL 1 AND 2
Two shielded RJ45 sockets provide serial port connection. These ports operate via a terminal server application. The RS232 pin out is as per the EIA/TIA-561 standard and as per the Mimomax Tornado Radio

RS232 PIN OUT

RS485 FULL DUPLEX PIN OUT

RS485 HALF DUPLEX PIN OUT

GPIO/ALARM/REF
The GPIO alarm and reference in/out signals are available via a 10-pin connector on the front of the radio.

CONFIGURATION OF THE GPIO
Configuring of the GPIO should be performed using CLI.

• The alarm provides both open and closed in alarm contacts and is isolated from the rest of the radio circuitry.
• The External reference input/output is an isolated differential pair.

GPIO AS AN ANALOG INPUT

• The GPIO signals are all referenced to the Radio ground. Their linear range is 0-12V, but they will survive up to 60V. An external series resister can be used to provide a higher linear range using the following formula.
  • Rext = (Vmax – 12)*109k/12
• Where Vmax is the maximum voltage that will be measured, 109k is the input impedance, and Rext is an external series resister between the voltage being measured and the radio’s GPIO pin. Remember to round the resister value up to the nearest resistor value above the calculated value.
• Next use the GPIO input calibration process to calibrate the system through the external resistor. This process will be based on a known voltage before the resistor.

It is recommended that the radio is calibrated on the bench before installation

GPIO AS A DIGITAL OUTPUT
The GPIO pins provide an open collector output, which can be used to drive a relay or generate a level. The current can be up to 100 mA.

GPIO Output Circuit

GPIO PIN OUT

USB
An A-type USB connector provides the connection to the USB host port. (software support in future).

GPS
Connector for GPS antenna. Supports GPS NMEA 0183 connectivity for auto discovery into the CNMS system. Used for establishing the radios coordinates during radio commissioning.

LED BEHAVIOUR

The LEDs have multi functionality and indicate

• Pwr – Indicates that unit has DC power connected and is powered on
• Lnk – (BRU-P) The link is always up
• Lnk – (RRU-P) Flashing indicates the radio is in auto scan / discovery mode and is searching for best Pyxis base radio
• Lnk – (RRU-P) Solid indicates the unit has acquired suitable Pyxis Base radio and is communicating
• Lnk – (RRU-P) Off indicates unit has lost communications with Base radio after 500 ms of no transactions to / from a Pyxis base radio.
• GPS – Flashing indicates GPS antenna connected and is searching for GPS Lock (In auto mode)
• GPS – Solid indicates either manual mode or GPS lock and co-ordinates sent to NMS in auto mode
• GPS – Off indicates no GPS connected in auto mode.
• S1 – Radio status and traffic activities.
• S1 – Flashing indicates unit is obtaining IP address in DHCP mode
• S1 – Solid indicates either Static IP or IP obtained in DHCP mode
• S2 – Reserved. Unused at the moment
• Alm – During boot up the LED is lit solid. Once boot up is complete, the LED will only be lit when the radio is in an Alarm state.

RADIO SETUP AND CONFIGURATION

The radio units can be interconnected for bench-based testing or configuration. Attenuators with the appropriate value and power handling must be used. The diagram below shows the interconnection of attenuators, cables and splitters for a standard bench test.

Note : If a MDL system with only one RRU is desired then the splitter and second RRU can be omitted. Mimomax can supply a splitter that provides 4 ports and ~30dB attenuation.

Recommended equipment

• 3x high power attenuators (30 dB, >10 W)
• 1x low power attenuators (30dB)
• 1x splitters
• Sufficient cables and adaptors to connect the above devices to the radio units

TESTING THE NETWORK SETUP
Once the RF setup has been completed the radio units can be powered up, networking on associated devices configured and the units logged into. Refer to the label located on the underside of the radio unit to identify the configured IP address and subnet mask. The diagram below shows an example of the network in Bridged mode. We generally recommend setting up MDL in Bridged mode because the network settings are simpler however it depends on your IP planning for the multipoint network.
First, we connect to each radio unit locally. To do this, configure the IP address, subnet mask and gateway of the connected device or laptop. It is crucial that the laptops/devices are on the same subnet as the Pyxis radios and also that their gateway is set to the Pyxis’s IP address. This means you will need to reconfigure the IP information if moving the laptop between radio units.

Next confirm network connectivity by pinging each radio unit from the connected laptop. If this is not successful, use ipconfig to check your networking settings. Once we have network connectivity with the local radio unit, type the appropriate IP address into your web browser to access the unit.

• Ipconfig on the left (In this case the gateway has not been set properly!) and on the right Pinging 192.168.0.1 (the BRU) from Laptop A
• You are now ready to log in, configure, and monitor the system.

SYSTEM CONFIGURATION USING CCMS AND CLI

• CCMS is web-based software that enables you to connect to a Mimomax radio unit using a web browser such as Internet Explorer, Firefox or Chrome. No application other than a web browser needs to be installed on your PC or laptop. The radio unit serves up the CCMS web pages. For a full list of functions please refer to Mimomax’s CCMS Manual.
• CLI is a command line interface used for configuring the radio over low bandwidth networks. For a full list of functions please refer to Mimomax’s Command Line Interface (CLI) Manual.

INSTALLATION

MOUNTING SOLUTIONS
Pyxis radios can be mounted in several different ways to meet the customers application. These include

DIN RAIL MOUNTING

WALL / SURFACE MOUNTING

1U RACK MOUNTING

1U RACK MOUNTING WITH A TORNADO RADIO

TORNADO PIGGY BACK MOUNTING

MOUNTING OPTIONS BILL OF MATERIALS

INSTALLATION OF SOLUTION
A typical system installation for the Pyxis system is shown below which follows the same approach as when installing a single Tornado Radio solution. Regardless of the mounting configuration used, the appropriate site engineering must be undertaken. Site engineering must consider safety aspects such as grounding and lightening protection but also needs to take performance parameters such as antenna location, antenna separation and other RF sources. Please contact Mimomax if more information in these areas is required.
Note: refer to section 7.2.1 for grounding and lightning protection considerations.
A comprehensive source of information and guidance on general site engineering issues has been published by ETSI: EG 200 053 v1.5.1, 2004/06 ‘Electromagnetic compatibility and Radio Spectrum Matters (ERM); Radio site engineering for radio equipment and systems’. It is highly recommended that this freely available ETSI document be studied in detail, in conjunction with this and the Pyxis Radio Unit manuals.

SITE ENGINEERING
For personal safety and equipment reliability reasons the following must be adhered to

• Power Supply
  The equipment must be powered from a power supply complying with the requirements of IEC 60950-1 including compliance with sub clause 7.4 ‘Insulation between primary circuits and cable distribution systems’.

• Grounding
  On site ground networks must be created in accordance with ITU-T Recommendation K.27: Protection against Interference; Bonding Configuration and Earthing inside a telecommunication building.

• Equipment Location
  It is recommended that the radio unit is installed in a dry, dust-free room.

• Equipment Ventilation
  A thermal study should be carried out for each site to check and ensure that thermal conditions within the enclosures do not go beyond the radio units operating limit. If the temperature of the site is known to exceed the operating limits of the unit, then the enclosure must have an air conditioning, or a forced air system installed to stabilise these excursions.

Lightning Protection
Lightning protection is important to ensure the protection of the tower, antenna and the radio equipment hardware. The diagram below shows the point earthing concept recommended.
The technique recommended to protect the radio unit, antenna, feeder and tower uses earthing kits in strategic places. The key points are: adjacent to the feeder connector at the antenna, where the feeder leaves the base of the tower and where the feeder enters the building structure. If earthing kits supplies are limited or connection to an earth point is difficult, then order of importance of the earthing locations is as follows

1. For a top mounted antenna acting for lightning protection
2. At antenna connection point.
3. At the tower base.
4. At the entry to the building.
5. For a general mounting of antenna
6. At the entry to the building.
7. At the tower base.
8. At the antenna connector.

Lightning Protection
A gas discharge unit is required to release high voltage charges developed between the cable inner and outer. There are two types available, a transmitting and a receiving variant. The transmitting variant is the larger. It is very important that these variants are not confused because the lower discharge potential rating for the receiver unit will be triggered by transmitting voltages. This will cause a high VSWR and poor performance.

SPECIFICATIONS

ELECTRICAL SPECIFICATION

Power supply
Input voltage| Normal operation| 10.5| | 60| V
** Total Power Consumption| Idle, Tx off| | 4| 5| W
Tx Active| | 9| 10| W
Ethernet
** Tx Peak Differential voltage| 100Base-Tx,         100 Ohm termination| 0.95| 1.00| 1.05| V
Tx voltage symmetry| 100Base-Tx,         100 Ohm termination| 98| 100| 102| ** %
Tx Peak Differential voltage| 10Base-T, 100 Ohm termination| 1.54| 1.75| 1.96| V
Serial
Output Voltage swing| Loaded with 3kOhms to ground| +/- 5| +/- 5.4| | V
Output short circuit current| | -60| | +60| mA
Input Voltage| | -18| | +18| V
Input Low Threshold| Temperature ambient = +25| 0.6| 1.2| | V
Input High Threshold| Temperature ambient = +25| | 1.5| 2.0| V
GPIO
Input voltage| Input| -0.3| | 60| V
Current Sinking Capability| Output driving low| | | 100| mA
Input Impedance| | | 109| | kOhms
Alarm
Input current (max)| | | | 300| mA
Switching voltage (max)| | | | 33| VDC
Reference input
Level| | -5| | +20| dBm
Frequency| | | 10| | MHz
Reference output
Level| | | 0| | dBm
Parameter| Conditions| Min| Typical| Max| Units**
Frequency| | | 10| | MHz

PHYSICAL SPECIFICATION

• Height = 51
• Width = 266
• Depth = 155

| **** mm

COMPLIANCES

MECHANICAL DIMENSIONS

DOCUMENT HISTORY

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