Campbell Scientific RF320-Series Ritron VHF/UHF Radios - Manual (Page 25)

RF320-Series Ritron VHF/UHF Radios
TABLE 8-2. Radio Troubleshooting Guide
Indication Probable Cause Corrective Action
Radio LED blinking red in receive
mode Internal fault with transceiver
module Cycle power to the radio. If the
fault persists, replace the radio.
Radio LED blinking red with
transmitter manually keyed
1
Internal fault with transceiver
module Cycle power to the radio. If the
fault persists, replace the radio.
Radio LED continuously bright green
with no input signal present Squelch settings programmed
incorrectly, or an internal fault
with transceiver module Programming of the transceiver is
not covered in this manual.
Cycle power to the radio. If the
fault persists, replace the radio.
Intermittent or no communications
with remote site(s) Radio is inoperative or not fully
functional Perform radio functional checks.
Defective system power source Locate and repair power source
fault Input voltage missing or incorrect
when measured between Pins 6 and
15 of the DB-15M connector
Defective radio-to-modem
interface cable Verify continuity of the interface
cable per the wiring diagram; repair
or replace as necessary.
Radio’s current drain is excessive Perform input voltage load
regulation check.
Defective system power source Locate and repair power source
fault.
Input voltage drops below 9 Vdc with
transmitter activated
Defective radio-to-modem
interface cable Verify continuity of the interface
cable per the wiring diagram; repair
or replace as necessary.
Radio’s current drain is excessive Internal fault with transceiver
module Cycle power to the radio. If the
fault persists, replace the radio.
Faulty input voltage Perform input voltage checks. Radio’s RF output power not as
specified
Internal fault with transceiver
module Replace radio.
Radio’s operating frequency is
incorrect Internal fault with transceiver
module Replace radio.
Notes:
1. In a non-fault condition, the LED will be continuously illuminated red while the radio’s transmitter is active.
However, due to the short burst of data transferred during normal system operation, the LED will appear to blink
during transmission. This is normal. The blinking fault indication will most likely only be perceived when the
transmitter is manually keyed with the push-to-talk switch (CSI# 13855).
8.3 Radio Functional Checks
The following procedures should be followed to verify the proper operation of
the radio. As written, the procedures can be executed individually for
maintenance purposes or used in conjunction with the troubleshooting guide
for diagnostic purposes.
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