Operations Manual

Page 6 RF Technology T50
1.1.3 Power Led
1 OPERATING INSTRUCTIONS
LED Flash Cadence Fault Condition
9 flashes, pause External PA failure
8 flashes, pause Low dc supply on External PA
7 flashes, pause External PA Over Current Condition
6 flashes, pause External PA Over Temperature
5 flashes, pause Synthesizer unlocked
3 flashes, pause Unable to communicate with External PA
2 flashes, pause The current channel is not programmed or the frequency
is out of range.
1 flash, pause Low dc supply voltage
LED ON continuously Transmitter timed out
Table 1: Interpretations of LED flash cadence (TX LED Off)
LED Flash Cadence Fault Condition
9 flashes, pause External PA failure (if PTT is pressed)
8 flashes, pause Low dc supply on External PA (if PTT is pressed)
7 flashes, pause External PA Over Current Condition(if PTT is pressed)
6 flashes, pause External PA Over Temperature(if PTT is pressed)
4 flashes, pause Either PLL is near operational limit
3 flashes, pause Forward Power Out of Range(if PTT is not pressed)
2 flashes, pause Reverse Power ratio exceeded.
1 flash, pause Low dc supply voltage
LED ON continuously Transmitter timed out
Table 2: Interpretations of LED flash cadence (TX LED On)
1.1.3 POWER LED
The PWR LED shows that the dc supply is connected to the receiver and that the
microprocessor is not being held in a RESET state.
1.1.4 TX LED
The TX LED illuminates when the transmitter is keyed. It will not illuminate (and an
ALARM cadence will be shown) if the synthesizer becomes unlocked, or the output
amplifier supply is interrupted by the microprocessor.
1.1.5 ALARM LED
The Alarm LED can indicate several fault conditions if they are detected by the self test
program. The alarm indicator shows the highest priority fault present. See Tables 1
and 2.