120 20195-100 Preliminary
Paragon4 – UHF, 700, & 800MHz User Manual
20
5. Trouble-Shooting and Testing
The checks described below should be done at time of installation, annual intervals, or when-
ever deterioration in performance is noted.
5.1 Equipment Required
•
In-line RF powermeter –0.5 W range for the 200mW- Exciter module. Consider watmetters
in -10W range for the reflected power and –100W range for the forward power of the power
amplifier.
•
Radio service monitor (IFR-120B with option 03: 30 kHz IF filter or equivalent).
•
RG-214 or RG-223 cable with N-Type male connector to connect Paragon4 base station to
the service monitor.
Important note: Before proceeding make sure that the service monitor has been calibrated re-
cently and has warmed up for at least the time specified by its manufacturer.
Some reported frequency and deviation problems have actually been erroneous indications from
service monitors that have not adequately warmed up. This is particularly likely when field serv-
ice is done during winter months
.
5.2 Recommended Checks
A)
After an installation
1.
Power-up LED Sequence
2.
Transmit power output
3.
Reflected power output
4.
RF Link test between Paragon4 unit and mobile unit(s) (PING from a PC as per para-
graph 5.4.1)
B)
For annual maintenance & trouble-shooting
Same checks as A) plus:
5.
Carrier frequency error
6.
TX Deviation
7.
Low frequency balance
8.
12dB SINAD
9.
Receiver distortion
10.
Main RX and Aux. RX RSSI
11.
Verify power supply connections & terminals torque settings (see paragraph 2.4.1.1)
