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— Chapter 5. Repeater Tests
RF-7000E Operations Manual
62
Administrative Requirements
The US Federal Agency or other local Tele-communications Administrations may require
measurement of the output power of the repeater at installation or when any changes are made
which cause the output power to change. Using the power meter, measure and log the output power
as directed in Chapter 5.
Troubleshooting
Soft failure of one amplifier will be indicated by a drop of approximately 6 dB in the received signal
level at the terminal in the direction of transmission, which will be indicated on the AGC, RSL meter
on the terminal equipment. Amplifier AGC/ALC may correct for this drop. The failure of one amplifier
will most likely be caused by a failure of DC power to the amplifier. Using the DVM, check for
presence of DC voltage at the amplifier power feed through connections. Another way to check is
insert DVM probes to pins #1 and #2 (Primary DC), then #1 and #3 (Secondary DC) from the back
side of amplifier wire harness as shown in Figure 3. Pin #1 is Ground. Amplifier DC voltage should be
+11 ~ +16.5 V.
If the received signal at the terminals is low but does not indicate a complete failure on one amplifier,
the most likely cause is low voltage from the batteries. Low voltage is an indication of a possible DC-
DC converter failure, battery failure, or a failure of the charging system. In the case of the primary
cell batteries, the batteries are probably reaching the limit of their life. Check the batteries and all
power lead connections. If solar panels are used, be sure they are not obstructed from sunlight and
that the surfaces are clean. If an AC power supply is used, low voltage is probably the result of a
power failure, the duration of which exceeded the reserve power limits of the standby battery. Check
the standby battery in accordance with the instructions given by the manufacturer of the power
supply.
NOTE:
Contact the Customer Service Department of Peninsula Engineering Solutions whenever
problems with the unit cannot be resolved.
Table 14 System Troubleshooting
Problem
Cause
Solution
Overheating
Inefficient Cooling
Clear any airflow obstructions.
Shade the unit if it is in an extremely hot
environment.
Low Voltage or
No Voltage
(Low Battery
Alarm)
Improper Solar Charging
Clean solar panels or remove obstructions.
Do not use an acetone-based solution for cleaning.
Power Supply Failure
Check the condition of the power source.
Check all wiring and power leads to the power
source.
Check any fuses or circuit breakers in power supply
equipment.
Check condition of battery plant.
Check AC power service for outages or other service
problems.
Overload, blown fuse
Determine the cause of failure.
Correct the failure.
Replace the 3A fuse with a spare.
Internal DC/DC Converter
Failure
Cycle the DC Battery input power to reset and restart
the converter. The converter has built-in safety
shutdown circuits.
Contact Peninsula Engineering Solutions to
replace unit.