Operating instructions

6 1892 1236 - SX500 Transmitter Operator Note - v1.6.1 / Apr 2005
Figure 2 Programming Adaptor
FREQUENCY PROGRAMMING
An area of the PIC memory is re-programmable and allows up to 24 channels to be set to
random frequencies and 232 channels to be set to sequential frequencies. The first 8 of the
random frequencies can be accessed in parallel mode using the three programming pins
RB1, 2 and 3. To access the rest of the channels, the serial programming mode is required.
The channel change can be controlled through this serial input.
The Windowsr based software supplied with the SX500 transceiver allows both a new
channel to be selected as well as the re-programming of the internal frequency information.
The software can be run on a PC with the serial port connected to PL3 of the SX500
transceiver via a suitable adaptor as shown in Figure 2. If the internal stored data is to be
accessed, the read-back function is desired, then PL3 pin 13 of the transceiver 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.
Software Installation
The software is installed by following the normal procedures for installing windows based
software.
Insert CD or the first floppy disk and run the “setup.exe” program. Follow the on-screen
instructions and the s/w will be installed into the c:\program files\sx500 directory (WIN98) or
c:\programs\sx500 (WIN95) directories. A program icon will be placed in the s/w group
designated during the installation routine.