Kenwood NX-900 Service Manual page 52

NX-900
Item
Panel test mode
5. Sensitivity 1) CH-Sig : 1-1
check SSG output
Wide 5k:
–117dBm (0.32µV)
(MOD: 1kHz/±3kHz)
Wie 4k:
–117dBm (0.32µV)
(MOD: 1kHz,
Dev: ±2.4kHz)
Narrow:
–117dBm (0.32µV)
(MOD:
1kHz/±1.5kHz)
Common Section
Item
Panel tuning mode
1. Setting 1) DC voltage: 13.6V
2) SSG standard modulation
[Wide 5k] MOD: 1kHz, DEV: 3kHz
[Wide 4k] MOD: 1kHz, DEV: 2.4kHz
[Narrow] MOD: 1kHz, DEV: 1.5kHz
2. LCD 1) Adj item: [CNTR]
Contrast Adjust: [✳✳✳]
Press [ ] key to store
the adjustment value.
3. Receive 1) Adj item: [RAST]
Assist Adjust: [✳✳✳]
2) Adj item:
[L RAST]→
[H RAST]
Adjust: [✳✳✳]
Press [ ] key to
store the adjust-
ment value.
4. Transmit 1) Adj item: [TAST]
Assist Adjust: [✳✳✳]
2) Adj item:
[L TAST]→
[H TAST]→
[L TAST] (TA)→
[H TAST] (TA)
Adjust: [✳✳✳]
PTT : ON
Press [ ] key to
store the adjust-
ment value.
52
ADJUSTMENT
Condition
PC test mode
equipment
1) Test Channel SSG
Channel: 1 AF VTVM
Test Signaling Oscilloscope
Mode: Analog Distortion
Signaling: 1 meter
SSG output
Wide 5k:
–117dBm (0.32µV)
(MOD: 1kHz/±3kHz)
Wide 5k:
–117dBm (0.32µV)
(MOD: 1kHz,
Dev: ±2.4kHz)
Narrow:
–117dBm (0.32µV)
(MOD:
1kHz/±1.5kHz)
Condition
PC test mode
equipment
1) Adj item: [LCD
Contrast]
Fixed Digit: 120
Press [Apply] but-
ton to store the
adjustment value.
1) Adj item: [Receive
Assist]
2) Adj item: [Low],
[High]
Press [Apply All]
button to store the
adjustment value.
1) Adj item: [Transmit
Assist]
2) Adj item: [Low],
[High], [Low (TA)],
[High (TA)]
PTT: Press
[Transmit] button.
Press [Apply All]
button to store the
adjustment value.
Measurement
Test-
Unit Terminal Unit
ANT
Ext. SP
connector
Measurement
Test-
Unit Terminal Unit
Adjustment
Specifi cations /
Parts Method
Check 12dB SINAD or
more
Adjustment
Specifi cations /
Parts Method
[Panel Adjust the LCD After replacing the
tuning contrast by looking. LCD align contrast.
mode] Fixed Digit: 120
[ ],[ ]
[PC test
mode]
The sub LCD display 3.0V±0.1V
[ ],[ ]
and [V] indicator
on the PC window [PC test mode]
shows VCO lock Press [Apply All]
voltage. Change the button to store the
adjustment value adjustment value
to get VCO lock after all adjustment
voltage within the point was adjusted.
limit of the speci-
fi ed voltage.
Note:
Confi rm the VCO
lock voltage approxi-
mately 3 seconds
after the adjustment
value is changed.
Remarks
Remarks