SCS Tracker Installationsanleitung Seite 27

acceptable. The SCS Tracker / DSP TNC filters the signal optimal with the integrated DSP
and requires no "external help".
• Noise blanker and notch filter should be switched off.
The SCS Tracker / DSP TNC is connected to the transceiver via an 6 pin mini-DIN socket.
PIN 1: Audio output from the TNC to the transmitter. The TNC supplies a pure audio
signal to the microphone (or ACC) input of the transceiver. The output amplitude can
be adjusted with the %X commands from 30 to 3000 mV (peak to peak) open circuit.
The output impedance of the DSP TNC is 1 kΩ.
PIN 2: Ground (GND). Common ground for all signals.
PIN 3: PTT output. During transmission this output is grounded by the TNC, so that virtually
all modern transceivers are usable. A VMOS power transistor is used as switch, which
gives optimum results.
PIN 4: Audio from the receiver to the TNC. The TNC receives signals directly from the
speaker output of the receiver. The volume should not be turned up too much. A fairly
low volume is quite sufficient. It is better to take the AF signal from a low level output
which is independent of the volume control. These outputs are often labeled AUX or
ACC. The input impedance of the TNC is 47 kOhm. The TNC operates with an input
signal down to approx. 10 mV
PIN 5: Optional power supply input. The TNC can be supplied with power via this input.
This is especially useful if the transceiver gives a power supply output via the AUX
socket. The TNC requires approximately 10 to 20 V at a maximum of 100 mA,
typically 50 mA and <20 mA in Tracking mode.
For immediate connection of the TNC to the transceiver use one of the cables you find in the
accessories catalog chapter 5 page 28. In any case, if you want to use one of this cables, you
also need the adapter #8180 as well. If you do not find a matching cable there, then use the
attached 6 pin mini-DIN cable and complete it to connect the TNC to the transceiver:
The socket is wired as follows (viewed from the rear of the TNC).
6 5
4 3
2 1
Figure 2: Connection to the transceiver.
and should not be driven with more than 2 V
p-p
PIN Color
1 Violet
2 White
3 Yellow
Table 2: Cable Colors: 6 pin miniDIN cable
Pin 1: Audio output from the TNC to the transmitter.
Pin 2: Ground.
Pin 3: PTT output. (to transmitter PTT line)
Pin 4: Audio input from the receiver to the TNC.
(loudspeaker or appropriate AUX/ACC socket)
Pin 5: Optional power supply input.
Pin 6: Not used.
PIN Color
4 Green
5 Blue
6 Red
3. Installation
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