User Manual

5 Maintaining the Base Station
Base Station User Guide 53
button. At the same time, all fault counters in the microcontroller software are reset
and the LCD is reset in the same manner when depressing the NAVIGATE button.
PA Rear Panel Controls
 AC ON/OFF – AC rocker switch (SPST) to supply AC to the AC-DC switching power
supply.
 AC BREAKER – Resettable circuit breaker, used to protect against inrush currents
and high current draw from switching power supply. The thermal circuit breaker is a
single pole configuration
 REMOTE PORT – Includes the following:
pin 1: ground to reset microcontroller, float otherwise.
pin 2: ground for 2 seconds to toggle carrier on/off, float otherwise.
pin 3: common ground.
pin 4: DC power supply sample (28Vdc nominal).
Power and Signal Level Tracking
The following parameters are tracked by the NMS. The default sampling time is every
20 minutes. Check that the values of the following items are within the expected value
range. If there is a deviation, refer to NMS Monitored Parameters on page 3.
Parameter Expected Value Measured at
Downstream Received
Power
- 16 ± 3 dBmV MMU
Downstream SNR ≥ 30 dB MMU
MMU Output Power
62 ± 4 dBmV
MMU
Upstream Received SNR ≥ 22 dB WMTS