Initial frequency stability:
±20 Hz disciplined to GPS (GPS fix occurs after power up and once
per day thereafter)
Channel bandwidth:
1500 Hz (300 bps), 2250 Hz (1200 bps)
GPS receiver type:
3.3 V active
Maximum GPS antenna RF
gain:
25 dB
Timekeeping
Initial accuracy:
±100 μs (synchronized to GPS)
Drift:
±40 ms/day (without GPS)
GPS schedule:
1 fix at power up (updated at ~11-hour rate)
Transmission continuation
without GPS fix:
6 days
Interface connectors
RS-232:
DB9 F, DCE, 3-wire RS-232
Satellite RF transmit out:
Type N jack
GPS:
SMA jack
Power:
2-pin screw terminal, 0.2 in. pitch
7. Installation
7.1 Field site requirements
The GPS antenna must have a clear view of most of the sky and the transmission antenna must
have a clear view of the spacecraft. The TX325 must be installed in a well desiccated,
TX325 Satellite Transmitter for GOES V2
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