SCS Pactor, Руководство по установке

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3. Installation
3 Installation
The installation of the PTC is simple. You only need to correctly configure the cable between
the PTC, the computer and the transceiver, if this is not already available.
3.1 Power supply
The PTC has two inputs for its power connections which can be used alternatively. Either
connect via the DC-in supply socket at the rear of the unit, or via the connector for the short-
wave transceiver (Audio, pin 5). Both connections are decoupled with diodes and protected
against reverse polarity. An input voltage between 10…20 VDC is allowed. The current
consumption is usually around 200 mA at 13.8 V. The power supply inputs on the PTC are
especially filtered so that harmonics of the switch- mode regulator cannot pass to the outside of
the unit. The inputs are also protected by a self-resetting fuse.
3.2 The serial interface (RS232/V24) (PTC-IIpro & PTC-IIex)
The PTC-IIpro and the PTC-IIex communicate with the computer (respectively to the terminal-
program) via a serial interface using the RS232/V24 standard.
The connection for the serial interface is the 9 pin SUB-D socket on the rear of the PTC. The
connection type is that of a modem (DCE) with a 9 pin SUB-D socket. The PTC can thus be
connected to the computer with a standard 9 pin cable (1 to 1 connections). Connect this cable
to the COM1 or COM2 connector of your computer.
If your computer does not have a COM connector any more, but just USB, then you need an
USB to RS232 adapter (refer to chapter 5 on page 52).
For communication between PTC and computer, the data format is
8 bits, 1 stopbit, no parity
and half duplex . The baudrate can either be automatically sensed by the PTC or set by
command to a fixed value (refer to
SERBaud
command in the manual). If the auto baudrate
sensing is active, then, after switching on, the PTC waits for keyboard input.
PTC-IIpro : AUTOBAUD and press CR are displayed alternately on the green display.
PTC-IIex : The tuning display shows one dot slowly bouncing between the corners.
In this condition the PTC waits to receive a matching character from the computer, initiated by
the user or by the terminal program.
Alternatively a fixed baudrate can be entered into the PTC with the advantage that the
autobaud procedure after power-on is skipped. This is important for automatically operating
stations, as after a power-interruption the PTC continues to work again immediately then.
While in autobaud condition it cannot accept incoming calls.
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