Kenwood NXR-700 Service Manual page 86

NXR-700
Item Condition
15. High 1) Center
Transmit
Power
(Pre ADJ)
16. Coupler 1) Center
ADJ
17. High 1) Center
Transmit
Power
(Max power
limit ADJ)
18. High Frequency
Transmit 1) Low
Power 2) Center
3) High
Attach the EXCITER/FINAL
shield cover.
19. Low Frequency
Transmit 1) Low
Power 2) Center
3) High
Attach the EXCITER/FINAL
shield cover.
20. Deviation Modulation pattern
: 100Hz square signal
(The transmis- Connect the deviation meter to
sion VCO band the TX ANT end via the ATT.
is separated Deviation meter setting
into A and B. HPF: OFF
3-points for LPF: 15kHz
each, i.e., total De-emp: OFF
of 6-points shall Detector: (p-p)/2
be adjusted.) 1) A: Low
2) A: Center
3) A: High
4) B: Low
5) B: Center
6) B: High
Exit "Deviation" screen to "Test
Mode" screen, then set test
signaling mode to be "NXDN"
and signaling number to be "3".
Set Wide/Narrow drop down list
to be "Narrow". Set test channel
to be "1".
Deviation meter setting
HPF: OFF
LPF: 15kHz
De-emp: OFF
Detector: +peak, –peak
Push "Transmit" button, then
measure the deviation.
86
ADJUSTMENT
Measurement
Test-
Unit Terminal
equipment
Power meter Rear TX ANT
PC
DVM Final REF
Power meter
Power meter Rear TX ANT
PC
Power meter Rear TX ANT
Ammeter
Deviation Rear TX ANT
meter
Oscilloscope
PC
Adjustment
Unit Parts Method
PC Value: 1024
ADJ
Final VR2 25W
Final VR1 Adjust to the mini-
mum value.
PC Value: 1024
ADJ
Final VR2 30.0W
PC 25.0W
ADJ
5.0W
PC ±1.10kHz
ADJ Adjust it into clean
square wave with
changing "Sub-
audible Gain" and
"Audible Gain".
Check
Specifi cations / Remarks
Fixed value writing
±0.5W
Fixed value writing
±1.0W
±0.5W
10.0A or less
±0.1W
5.5A or less
±0.05kHz
Connect the deviation me-
ter to the TX ANT end via
the ATT.
±3.06kHz±0.20kHz
Clean sine wave.