brandywine communications QFS-106 Frequency Standard User Guide
- June 12, 2024
- brandywine communications
Table of Contents
brandywine communications QFS-106 Frequency Standard
Product Information
- Product Name: Frequency Standard QFS-106
- Model Number: QFS-106
- Part Number: 0150060XX
- Revision: E
- Date: July 2023
- Manufacturer: Brandywine Communications
- Address: 1153 Warner Ave
- Contact Number: (714) 755 1050
- Fax Number: (714) 755 0175
- Website: http://www.brandywinecomm.com
Product Usage Instructions
Unpacking:
Follow the steps below to unpack the product:
- Open the packaging carefully.
- Remove the product from the packaging.
- Ensure all included accessories and components are present.
Installation:
Follow the steps below to install the product:
- Select a suitable location for the product.
- Place the product on a stable surface.
- Ensure proper ventilation around the product.
Connections:
Follow the steps below to make connections:
- Refer to the provided diagrams to identify the appropriate ports.
- Connect the necessary cables to the corresponding ports.
- Ensure all connections are secure.
Powering the QFS-106:
To power the QFS-106, follow the steps below:
- Ensure the product is connected to a suitable power supply.
- Press the power button to turn on the QFS-106.
Loss of Input Signal:
If there is a loss of input signal, follow the steps below:
- Check the input connection for any loose cables.
- Ensure the input signal source is functioning properly.
- Contact technical support if the issue persists.
Loss of Output Signal:
If there is a loss of output signal, follow the steps below:
- Check the output connection for any loose cables.
- Ensure the output signal destination is capable of receiving the signal.
- Contact technical support if the issue persists.
Calibration:
To calibrate the product, refer to the calibration procedure provided in the user manual.
Brandywine Communications 1153 Warner Ave
(714) 755 1050
(714) 755 0175
http://www.brandywinecomm.com
INFORMATION TO THE USER FOR CLASS A DIGITAL DEVICE
WARNING: This equipment has been tested and found to comply with the
limits for Class A digital device pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction’s manual, may cause
interference to radio communications. Operation of this equipment in a
residential area is likely to cause interference in which case the user will
be required to correct the interference at his own expense.
The user is cautioned that changes and modifications made to the equipment
without approval of the manufacturer could void the user’s authority to
operate this equipment.
Revision History
| REVISION | DATE | COMMENTS | ECO NUMBER |
|---|---|---|---|
| NC | 10-26-04 | Original release of QFS-106 user guide. | – |
| A | 12-14-04 | Revision of the rear panel and mechanical outline drawings. | – |
| B | 08-03-05 | Revision of Section 3.1. | – |
| C | 02-14-11 | Illustrations of fuse installation | – |
| D | 10-24-17 | Corrected Fuse Ratings | – |
| E | 07-06-23 | Added drawings directly into document file | ECO12672 |
Specifications
I/O and Environmental (Rear Panel)
| SPECIFICATION | DESCRIPTION |
|---|---|
| Internal Reference Oscillator | OCXO Stability |
| OCXO Aging | 5 x 10-8 per year |
| Rubidium Stability | ±1 x 10-10 at 0 to 50°C |
| Rubidium Aging | 5 x 10-11 per month |
| Reference Input | Label |
| Number of Reference Inputs | 1 Input |
| Frequency | 10 MHz Standard |
| Level | 1 Vrms into 50 ohm |
| Connector | BNC |
| Reference Output (Buffered from Reference Input) | Label |
| Number of Reference Outputs | 1 Output |
| Frequency | 10 MHz Standard |
| Level | 1 Vrms into 50 ohm |
| Distortion | < 33 dBc |
| Connector | BNC |
| Outputs | Label |
Output 3 (J3), Output 4 (J4),
Output 5 (J5), and Output 6 (J6)
Number of Frequency Outputs| 6 Buffered Outputs
Frequency| 10 MHz Standard
Level| 1 Vrms into 50 ohm
Distortion| < 33 dBc
Connector| BNC
Phase Noise at 10 MHz| 1 Hz| -90 dBc/Hz
10 Hz| -110 dBc/Hz
100 Hz| -140 dBc/Hz
1000 Hz| -150 dBc/Hz
10000 Hz| -157 dBc/Hz
Environmental| Temperature| -30 to +60°C
Humidity| 95% non-condensing
Fuse| VDC Model| 400 VDC and 4A
VAC Model| 115/230 VAC and 250mA
Power| VDC Power Supply| 09 – 18 VDC (12V Nominal)
18 – 36 VDC (28V Nominal)
36 – 72 VDC (48V Nominal)
VAC Power Supply| 115/230 VAC
Power Connection| VDC Connector| DC Connector
VDC Connector 2 Pin| Pin A -> Positive
Pin B -> Negative
VAC Connector| AC Connector
Dimension| Length (Rack Mount & Chassis)| 19.00” and 17.00”
Height| 1.720”
Width| 6.150”
Weight| Weight| Typically 3 lbs
Switch and Indicator (Front Panel)
| SWITCH/INDICATOR | COLOR | DESCRIPTION |
|---|---|---|
| POWER SWITCH | –– | Used to switch the unit on and off |
| POWER LED | GREEN | Indicates that the unit has primary power |
| OUTPUT MONITOR 1 LED | GREEN | Indicates that Output 1 is present |
| OUTPUT MONITOR 2 LED | GREEN | Indicates that Output 2 is present |
| OUTPUT MONITOR 3 LED | GREEN | Indicates that Output 3 is present |
| OUTPUT MONITOR 4 LED | GREEN | Indicates that Output 4 is present |
| OUTPUT MONITOR 5 LED | GREEN | Indicates that Output 5 is present |
| OUTPUT MONITOR 6 LED | GREEN | Indicates that Output 6 is present |
| PLL LED | RED | Indicates that the unit is in power up mode or not locked to the |
reference input
GREEN| Indicates that the unit is phased locked to the reference input
RB LOCKED LED| GREEN| Indicates that the rubidium oscillator has reached
resonance lock if installed
CALIBRATE (POTENTIOMETER)| ––| Used to calibrate the oscillator
Unpacking and Installation
Unpacking
Carefully remove the QFS-106 from the shipping carton. The following items should be included in the shipment:
- 1 QFS-106
- 1 user guide
- 1 power cord
- 1 power mating connector (DC voltage only)
Note the power connection on the rear of the QFS-106 chassis. Please take note
of the voltage displayed near this power connection.
If the AC or DC voltage setting is incorrect, use a small screw driver to
remove the fuse holder. Reverse the fuse holder and re-insert the fuse holder,
making sure that the correct AC or DC voltage is now displayed on the rear
panel of the QFS-106.
Use the supplied power mating connector for the QFS-106 unit (DC voltage only). The user must connect the wires to the connector as shown in the table below.
| DC MODEL | DESCRIPTION |
|---|---|
| Pin A | Positive input voltage |
| Pin B | Negative input voltage |
| Mating Connector | Amphenol 97-3106A-10SL-4S |
| Strain Relief | Amphenol 97-3057-1004-1 |
Installation
The QFS-106 may be bolted directly onto a 19” rack mount enclosure.
Connections
Connect the power source to the QFS-106. Now connect the input reference
signal and output reference signals to the appropriate connectors on the rear
panel of the QFS-106. The Reference Output connector may be used when daisy-
chaining multiple QFS-106 units.
When daisy-chaining multiple QFS-106 units, these units should be connected as shown in Figure 1. This configuration ensures that all outputs are accurately locked to a common reference with minimal injection of the phase lock loop noise.
Operation
Powering the QFS-106
Once all the connections to the QFS-106 have been made, apply power to the
unit by switching the power switch to the on position. The power switch is
located on the rear panel of the unit. The Power LED and Output Monitor LEDs
(1 – 6) on the front panel of the unit will illuminate green.
Please note that units fitted with the quartz oscillators will take
approximately five minutes to warm up and these units will reach full accuracy
after twenty-four hours. Units fitted with the rubidium oscillators will take
approximately ten minutes to warm up.
Loss of Input Signal
The PLL LED illuminates green when an input signal is present on the Reference
Input connector on the rear panel of the unit. If the reference input fails,
the front panel PLL LED will extinguish.
Loss of Output Signal
The Output Monitor LEDs (1 – 6) illuminate green when output signals are
present on the Outputs connectors on the rear panel of the unit. If one or
more outputs fail, the front panel Output Monitor LEDs (1 – 6) will
extinguish.
Please note that a short circuit on the output cable may not always trigger
the output alarm.
Calibration
The QFS-106 is a free running standard that requires periodic recalibration. The unit must be calibrated against a frequency standard that is at least ten times more accurate than the oscillator fitted in the QFS-106 unit. Therefore OCXO oscillator units must be calibrated against a rubidium reference. Rubidium oscillator units must be calibrated against a cesium frequency standard or GPS disciplined rubidium. The front panel mounted potentiometer is used to adjust the frequency of the QFS-106 unit. The table below describes this calibration.
| OUTPUT | POTENTIOMETER | OUTPUT LEVEL ADJUSTMENT |
|---|---|---|
| Calibrate | 20 turn potentiometer (front panel) | Frequency standard calibration |
| Output 1 | 10 turn potentiometer (rear panel) | 7 – 13 dBm |
| Output 2 | 10 turn potentiometer (rear panel) | 7 – 13 dBm |
| Output 3 | 10 turn potentiometer (rear panel) | 7 – 13 dBm |
| Output 4 | 10 turn potentiometer (rear panel) | 7 – 13 dBm |
| Output 5 | 10 turn potentiometer (rear panel) | 7 – 13 dBm |
| Output 6 | 10 turn potentiometer (rear panel) | 7 – 13 dBm |
Diagrams
| FIGURE | DESCRIPTION |
|---|---|
| 1-Page 13 | QFS-106 Front Panel (AC and DC Models) |
| 2-Page 14 | QFS-106 Rear Panel (AC Model) |
| 3-Page 15 | QFS-106 Rear Panel (DC Model) |
| 4-Page 16 | QFS-106 Mechanical Outline (AC Model) |
| 5-Page 17 | QFS-106 Mechanical Outline (DC Model) |
| 6-Page 18 | Opened fuse housing (AC Model) |
| 7-Page 19 | Fuse being removed (AC Model) |
| 8-Page 20 | Detail of fuse installed (AC Model) |
Front Panel Drawing
Rear Panel Drawing (AC Model)
Rear Panel Drawing (DC Model)
Mechanical Outline Drawing (AC Model)
Mechanical Outline Drawing (DC Model)
Opened Fuse Housing (AC Model)
Fuse Being Removed (AC Model)
Detail of Fuse Installed (AC Model)
Documents / Resources
|
brandywine communications QFS-106 Frequency
Standard
[pdf] User Guide
0150060XX, QFS-106 Frequency Standard, QFS-106, Frequency Standard
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