Operating Instructions

TXE

CONNECTION

Connection to the ST600 transmitter is via PL1, PL2 and PL3 which plug directly into

the user's own equipment. The location of these connectors is shown in Figure 1 and

detailed in the following tables. (The unit is fitted with a 10 pin connector when parallel

frequency select facility is provided).

PIN NAME FUNCTION REMARKS

1 0V 0 volts common ground

2 RF O/P RF output 50 ohms output

3 0V 0 volts common ground

Connector PL1 pin detail

PIN NAME FUNCTION REMARKS

1 +VIN positive supply +6.0V to +15.0V

2 0V 0 volts common ground

Connector PL2 pin detail

PL1

NAME FUNCTION REMARKS

1 0V 0 volts common ground

2 transmit enable o/c = transmitter disabled

LOW <+0.5V = transmitter enabled

1k nom. internal pull-up to +Vin

3 DIGITAL I/P data input 0/+3V to 0/+12V, DC-coupled

4 ANALOGUE I/P data input > 50 mV p-p, AC-coupled

5 +5V

OUT

+ 5 volt supply output 50mA maximum current drain

6 RS232 I/P serial programming

i/p

RS232 level programming input

Note: Inverted TTL data can also be used.

If not used, leave not connected, or

connect to 0/V

7 0V 0 volts common ground

8 RB1

parallel frequency

select

internal pull-up to +5V, active low

9 RB2

10 RB3

Connector PL3 pin detail