Technical Manual

11-75-0000 SYNTHESIZED PAGING TRANSMITTER TECHNICAL MANUAL Issue 0600
Sea Air and Land Communications Ltd Page 10
8.0 TROUBLE SHOOTING
If the 1175 does not perform as required, the following points may lead to solving the problem.
Fault Check
No illumination of Green LED Bad power supply connection
Input activated but no transmission PSD configuration incorrect
Unit transmits but nothing received Poor aerial. Wrong frequency, RIC, baud-
rate. Power too low. Unit too hot. Too much
vibration
No RS232 serial communication Comport connections, baud-rate (1200-
9600) no parity, eight data bits, one stop bit
No synthesizer lock. Red LED flashes
rapidly
VCO loop, Channel busy active.
Green led flashes rapidly Low supply detector threshold
Unit starts, but does not complete
transmission
Poor supply volts, RF interference.
9 PROGRAMMING
9.1 Preparations for Connecting the Programming Software:
To change the field programmable options, the unit must be connected to the serial port of a IBM PC compatible computer running the appropriate Product
Support Disk (PSD) containing the software (S1162WE1.EXE) to program the 11-62.
The diagram on page 9 shows the cable connections for both 9 pin and 25 pin serial ports. The serial communication port has connections to match the
standard DB9 RS232 pin-out
To run the PSD, place the disk into floppy drive A. At a DOS prompt, type A: <enter> S1162WE1 <enter>.
Correct communication between the 1162 and the PC comm port is indicated by the ID and product numbers appearing in the bottom right hand corner of the
screen. If these fail to appear, check the baud rate setting in File/Preferences.