1. PCI/PCIe TFP Hardware
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JP3 is the DAC voltage range switch. When the jumper is OFF, the DAC voltage is 0-5 VDC;
when ON the voltage is 0-10 VDC. Both oscillators that are offered for this board have 0-5 VDC
control voltage ranges, therefore the 2mm jumper is not factory installed. If an external oscillator
requires a 0-10 VDC control voltage range, a 2mm jumper should be placed on JP3.
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JP4 is for factory use only.
Environmental Specifications
Temperature
Operating
0°C to +70°C (32°F to +158°F)
Non-Operating
-30°C to +85°C (-22°F to +185 °F)
Relative Humidity
Operating/Non-Operating
To 95% RH, non-condensing
Front Panel LED
LED indication
LED Definition
1 Off
No power
2 Red
No valid reference
3 Orange
Valid reference but not locked to it yet
4 Green
Freerun mode
5 Green Blinking
Locked to a timing reference
GPS Antenna
To operate in the GPS Synchronized Generator mode, the bc637 models use an external antenna.
The standard antenna kit supplied with these models includes the antenna, 50 feet (15.24 meters) of
coaxial cable and antenna mounting hardware.
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