RS 232 communication
PS-Data April 29
th
2013 Page 7
5. Four Faith F2403 GPRS Signal monitoring
The Four Faith F2403 GPRS modem can be used to monitor the signal strength during installation.
This can be done on units bought after October 2014 and with firmware versions after this date.
The Signal mode is activated using a special DB9 adaptor that is inserted into the RS232 port on the
Four Faith modem. When the adaptor is inserted will the online LED on the modem not display the
online status anymore but instead will the signal strength be display. The signal level is illustrated
by a number of blinks that is repeated every 3 seconds.
There are 5 different blink levels.
Level
Signal strength
(dBm)
Quality
1 -113 -> -103 Bad
2 -101 -> -95 Marginal
3 -93 -> -85 OK
4 -83 -> -75 Good
5 -73 or higher Excellent
The GPRS modem will not attempt to connect unless the signal strength is 2 or above but the signal
should be no less than 3 or more before a stable connection can be expected.
Be aware that when the Signal tester adaptor is inserted will the modem NOT attempt to go online.
The modem will return to normal operation when the adaptor is removed.
To Previous Page
Loading...
Need help?
General