Nautel NX15, Operation And Maintenance Manual

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NX15/NX25 Operations and Maintenance Manual Description
Page 1-6 Issue 6.0 2019-01-31
Other Functions
The exciter stage interfaces with the transmitter controller to perform other functions,
including:
• Provides an RF Drive Latch signal to the transmitter controller to inhibit the RF
drive for a set period of time during specific alarm/fault conditions.
• Provides a PM Enable signal for the RF power modules to monitor the PDM cable
status. This signal is held “low” (0 V) by the exciter.
• Provides real-time telemetry of exciter samples over a streaming bus to the
transmitter controller for use by various instruments on the AUI such as the
spectrum analyzer, Smith chart, signal constellation, audio levels, etc.
• Accepts 10 MHz, 1 PPS and 1 kHz synchronization signals from the selected
source (External 10 MHz, GPS Sync PWB or Combiner) for synchronizing the RF
carrier frequency and phase.