Technical Manual

120 20170-201 Paragon
PD
Technical Manual
25
5. Testing and Trouble-
Shooting
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 watt meter (150W & 10 W ranges)
• Radio service monitor (IFR-120B with op-
tion 03: 30KHz IF filter or equivalent).
• RG-214 or RG-223 cable with N-Type male
connector to connect ParagonPD to the
service monitor.
Important note: Before proceeding make sure
that the service monitor has been calibrated
recently and has warmed up for at least the
time specified by its manufacturer.
Some reported frequency and deviation prob-
lems have actually been erroneous indications
from service monitors that have not adequately
warmed up. This is particularly likely when
field service is done during winter months
.
5.2 Recommended Checks
A) After an installation
1. LED Indications
2. Save “unit config” to a file
3. Transmitter Output Power
4. Transmitter Reflected Power
5. RF Link test between Paragon
PD
and mo-
bile unit(s)
B) For annual maintenance & trouble-shooting
Same checks as A) plus:
6. Carrier Frequency Error
7. TX Deviation
8. Low Frequency Balance
9. 12 dB SINAD
10. Receiver distortion
11. RSSI check
Transmissions for some of the tests above are
initiated by pressing the PF1 membrane button
located on the front of the BDLC. For details on
its use, refer to Table 3 and section 3.2.1.1.2.2
on page 13 above.