Campbell Scientific RF310, RF312, RF313 Narrowband Radios - Manual (Page 22)

Section 2. Assembling the Radiotelemetry Network
2-10
Things to check if TASK B is unsuccessful:
1. Improper antenna orientation.
2. Bad connections on the antenna cables, or improper antenna cables.
3. Insufficient current supply at the base station. Is AC power good?
4. Field station radio is not connected to power or power supply is weak.
Check battery voltage under load, should be no less than 11.7 volts.
Battery voltage no load and no charging source should be about 12.4 volts.
5. Field station radio and RF modem may not be connected properly. Check
cable.
6. Field station RF modem is not receiving 5 Volts from datalogger
connection on pin 1 of the 9-pin cable. The RF modem must be connected
to the datalogger Serial I/O or CS /IO port with a straight through cable,
SC12.
7. Using wrong RF path. Are the RF310M dip switches set correctly?
TASK C: Establish link and baud rate between RF Modem and Datalogger by
slowly pressing [ENTER] a few times. Pause about 2 seconds between each
press of the enter key.
RESPONSE IF SUCCESSFUL: "*" from datalogger. The Asterisk prompt
indicates the datalogger is now communicating with the computer at the base
station.
Things to check if TASK C is unsuccessful:
1. Datalogger is on and has sufficient power.
2. Datalogger does not think it is still communicating with some other device
like a CR10KD keypad or phone modem.
3. Datalogger and RF Modem are the only devices connected together on the
9-pin connections.
Upon successful completion of TASK C, the datalogger is now in standard
Telecommunications Mode. See Section 5 of the datalogger manual for more
information about the Telecommunication mode. At this point the SOL modem
and EOL modem will be in the Transparent Mode of operation. Type "A," wait
2 seconds, and then type [ENTER] to receive a status sequence from the
datalogger. If everything is successful, type “E” to drop the link. If task C is
successful, PC208W should be able to call the field site.