User's Manual

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1.0/November 1998 1891 1210
Figure 2 Programming adaptor
3.5 FREQUENCY PROGRAMMING
3.5.1 Introduction
The ST500 has an internal memory which can store up to 128 RF channels (16 randomly
programmed and 112 sequentially programmed). The frequency and set-up information is
programmed into the unit by a synchronous PCM interface protocol.
The software supplied with the ST500 transmitter is the ST500PRG.exe program. The
software can be run on a PC with the serial port connected to PL1 of the ST500
transmitter via a suitable adaptor as shown in Figure 2. If the read-back function is
desired, then PL1 pin 10 of the transmitter must be connected to pin 2 of the PC serial
port via a buffer circuit. A 1k pull-up resistor to +5V must also be provided as shown.
3.5.2 Running the Software
1. Connect ST500 to a suitable supply and to the PC using the programming adaptor.
2. Insert the ST500PRG disk into drive A and type:
A:ST500PRG <return> then type:
3. The user is then prompted to enter the serial port number of his PC which is used
to communicate with the ST500 receiver. Enter 1 or 2.
After the software has successfully loaded the main menu screen is displayed as shown in
Figure 3. The screen shows the default settings which are entered at factory set-up.
These default settings will be displayed whenever the ST500PRG software is run.
Please note that mouse operation is not supported with this program.