User Manual

120 20191-100a Paragon-III User Manual
29
CHECKLIST B (Paragon-III)
General Check out (part2 of 2)
Paragon-III units are set and characterized at the factory to optimize performances.
It is not recommended to try readjusting units unless it is really required.
Misadjusting unit may result in significant performance losses.
The proposed adjustments in the "IF NOT?" column below, should be tried ONLY if system data
performance degradation is noticed combined with out of tolerance items.
Step ACTION EXPECTED RESULTS at
25°C
MEASURE WITH IF NOT?
Set the service monitor to generate on the selected receive frequency. Verify alternately for both receivers.
The carrier should be modulated with a 1.0 kHz tone at deviation level specified below:
8
12 dB SINAD
(Dataradio wide band
measurement method: no
audio filtering)
Set deviation to ±8 kHz.
Better than -108 dBm
including cable loss
(Typically -109 to -110 dBm)
- Backplane corre-
sponding to the re-
ceiver being verified:
J1 (RX1) or J5 (RX2),
Pin 6 Service monitor
(IFR) set to SINAD
- IFR IF filter set to MID
position or 300 kHz
wide filter.
Refer to section Error!
Reference source not
found.
9
Receiver distortion
(Dataradio wide band
measurement method: no
audio filtering)
- Set service monitor RF
Gen output to –70 dBm
- Deviation level as per
SINAD above.
≤ 5.5 %
(Typically < 3.5 %)
- Backplane corre-
sponding to the re-
ceiver being verified:
J1 (RX1) or J5 (RX2),
Pin 6 Service monitor
(IFR) set to
DISTORTION.
- IFR IF filter set to MID
position or 300 kHz
wide filter
.
Refer to section Error!
Reference source not
found.
10
RSSI
Apply to each receiver
input the following RF
level of -110dBm
2.0 VDC (+/- 0.3VDC)
- Backplane corre-
sponding to the re-
ceiver being verified:
J1 (RX1) or J5 (RX2),
Pin 5
- DC Voltmeter
measurement
Refer to section x for all
models.
Refer to factory technical
support only if RX data
performance degradation is
noticed combined with out
of tolerance RSSI readings.