Operating instructions

4 flashes, pause

Either PLL is near its operational limit

3 flashes, pause Unable to communicate with the External PA.

2 flashes, pause

The current channel is not programmed or the channel

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)

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.

2 Transmitter Options

There are NO internal jumpers in the T50.

There are many software selectable options. Some options are selected on a per channel

basis, and some are defined globally (

i.e. the parameter is fixed irrespective of which

channel is selected). Below is a description of these global parameters

2.1 Serial I/O Parameters

There are two serial ports. There is the main serial port which is brought out to the front

panel connector. This is referred to as PORT0. There is another serial port which is for

factory use only. It is referred to as PORT1.

The baud rate, can be defined for PORT0. PORT0 is set by default to 57.6Kbps, with

No parity.