m3trc_eng (08.01.02)
- 20 -
Kompetent für Elektroniksysteme
- 21 -
Kompetent für Elektroniksysteme
2) Adjusting audio output
- connect a level meter and the radio (line) to the audio output, the nominal level of the
level tones should be - 6 dBm for 2-wire connection; for multi wire connection adjust to
reach the nominal deviation of the radio
- use poti no. 3 (CS3) for adjustment, 1000 Hz level tone is transmitted automatically
1
GND
2
switch pin 1
3
PTT, open collector, max. 100 mA to GND
4
audio input -
6
digital output Q0
10 RXD RS232
11 + 12 Volt
5
audio output -
9
TXD RS232
7
digital output Q2
8
digital output Q4
12 analog input
13 carrier input
GND 14
switch pin 2 15
emergency output, open collector, 100 mA to GND 16
audio input + 17
reference voltage for digital output 19
GND RS232 23
+ 12 Volt 24
audio 18
n.c. 22
digital output Q1 20
digital output Q3 21
digital GND 25
Connector male, view from rear Major 3 TRC
- switch on pin 2 and 15 only in version without power supply, otherwise n.c.
- use pin 5 and 18 for 2-Wire connection
- RS232 (pin 9, 10, 23) only with option FFSK/RS232