User Manual

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 Windows® 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 s/w 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.