SCS PTC-IIex, Руководство пользователя

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3 Installation
PIN 2: Ground (GND). Collective grounding point for all signals.
PTT output. While transmission this output from the PTC-IIex is grounded, so
that virtually all modern transceivers are suitable. A VMOS-field-effect transistor
is used as the sw
PIN 3:
itch, which gives optimum results. The switched current should
PIN 4:
es with an input signal down to approx. 5 mV
RMS
and should not
PIN 5:
e PTC-IIex requires approximately 10 to 20 Volts DC at a
Use the attached 8-pole DIN to t t C the transceiver:
not exceed 1 A.
Audio from the receiver to the PTC. The PTC-IIex gets its information directly
from the loudspeaker output of the receiver. The volume should not be turned up
too far. 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 PTC is 47 kOhm. The
PTC-IIex operat
exceed 1 V
RMS
.
Optional power supply input. The PTC can be supplied with power via this
input. This is especially useful if the transceiver gives a power supply output via
the AUX socket. Th
maximum of 0.3 A.
cable connec he PT -IIex to
PIN Color PIN Color
1 Violet 5 Blue
2 White 6 Red
3 Yellow 7 Black
4 Green 8 Brown
Table 3.1: Cable Colors: 8-pole DIN-cable
The socket is wired as follo ws (Viewed from the rear of the PTC-IIex).
8
7
2
6
5
4
3
1
Pin 8: No
Figure 3.3: Connection to the transceiver.
NOTE: Unfortunately, there are 8-pole plugs with different pin numbering for the PINs 7
and 8. The PTC-IIex needs an 8-pole plug with U-shaped contact footprint. Plugs with
circular contact footprint don’t fit or can only be connected to the PTC-IIex with
damaging force! One should not blindly rely on the printed numbers on the plug. The
PTC can be used without changes, the
pin-out is the same of the Z80-PTC set for AFSK.
tput from the PTC to the transmitter.
C/ACC socket)
supply input.
t connected.
Pin 1: Audio ou
Pin 2: Ground.
Pin 3: PTT output. (to transmitter PTT line)
Audio input from the receiver to the PTC.
Pin 4:
(loudspeaker or appropriate AU
Pin 5: Optional power
Pin 6: Not connected.
Pin 7: Not connected.
connections as shown here in the handbook should be used as a reference.
The 8-pole DIN socket is mechanically designed that a 5-pole DIN plug (180
0
) may be
plugged into it too. An existing cable for the Z80-
11