User Manual

120 20191-001 Paragon-III Technical Manual
19
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 correspond-
ing to the receiver be-
ing verified: J1 (RX1)
or J5 (RX2),
Pin 6 (see Figure 13,
page 15)
- Service monitor (IFR)
set to SINAD
- IFR IF filter set to MID
position or 300 kHz
wide filter.
Refer to section 5.2.2
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 correspond-
ing to the receiver be-
ing verified:
J1 (RX1) or J5 (RX2),
Pin 6 (see Figure 13)
- Service monitor (IFR)
set to DISTORTION.
- IFR IF filter set to MID
position or 300 kHz
wide filter
.
Refer to section 5.2.2
10
RSSI
Apply to each receiver
input the following RF
level of -110dBm
2.0 VDC (+/- 0.3VDC)
- Backplane correspond-
ing to the receiver be-
ing verified:
J1 (RX1) or J5 (RX2),
Pin 5 (see Figure 13)
- DC Voltmeter
measurement
Refer to section 5.2.2.5 for
all models.
Refer to factory technical
support only if RX data
performance degradation is
noticed combined with out
of tolerance RSSI readings.