Page 5–26
UPLC-II™ System Manual
Table 5–14. (FSK Mode) Input/Output Descriptions
Input Name
TX or
RX
Action When Input Applied
Trip Key TX TX keyed to Trip Frequency
UB Key TX TX keyed to Unblock Trip Frequency
DTT Key TX TX keyed to Direct Transfer Trip Frequency
LR Key TX TX keyed to Line Relay (POTT/UB) Trip Freq.
A Key TX TX keyed to Channel "A" Trip Frequency
B Key TX TX keyed to Channel "B" Trip Frequency
PC Key TX TX keyed for Phase Comparison
Power Off TX TX output level shut off, no frequencies transmitted
Boost TX TX TX output level increased to high level setting in Phase Comparison mode
Trip Test Inputs TX See Chapter 6
SOE Event 1/2/3 Both Causes "Event 1/2/3" to be recorded in SOE log
Output Name TX or RX Active State
General Alarm Both Any major hardware failure occur
Reflected Power TX TX % reflected power above threshold setting
Main RF Output TX TX level above 0.3W on Main Power Amp
Redundant RF Output TX TX level above 0.3W on Redundant Power Amp
TX Shift High TX TX keyed to shift high frequency
TX Shift Low TX TX keyed to shift low frequency
Fade Alarm RX RX level below fade alarm threshold setting since last RX calibration
Good Channel RX RX level below fade margin threshold setting since last RX calibration
Noise RX RX freq. not recognized, unstable in freq. or high noise relative to valid signal
Guard RX Receive Guard Freq. with adequate level & RX logic satisfied
Trip RX Receive Trip Frequency with adequate level & RX logic satisfied
Checkback Trip RX
Receive Trip Frequency with adequate level only (Do not have to receive
Guard before Trip)
DTT Guard RX Receive DTT Guard Frequency with adequate level & RX logic satisfied
DTT Trip RX Receive DTT Trip Frequency with adequate level & RX logic satisfied
DTT Checkback Trip RX
Receive DTT Trip Frequency with adequate level only (Guard before Trip not
required)
LR Guard RX 3-Freq Receive Line Relay (POTT/UB) Guard Frequency & RX logic satisfied
LR Trip RX 3-Freq Receive Line Relay (POTT/UB) Trip Freq. & RX logic satisfied
LR Checkback RX
3-Freq Receive Line Relay (POTT/UB)Trip Freq. with adequate level only
(Do not have to receive Guard before Trip)
Trip Negative RX Phase comparison negative half cycle frequency received
Trip Positive RX Phase comparison positive half cycle frequency received
A or B Guard RX 4-Freq Receive A or B Guard Freq. with adequate level & RX logic satisfied
A or B Trip RX 4-Freq Receive A or B Trip Freq. with adequate level & RX logic satisfied
A or B Checkback Trip RX
4-Freq Receive A or B Trip Freq. with adequate level only (Do not have to
receive Guard before Trip)
Trip Test Outputs Both See Chapter 6
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