Kenwood NX-220 Service Manual page 78

NX-220
Mode Signaling
Audio
NXDN
CW ID
• Balance is common with all the above deviation adjustments. If Balance (Transmitter Section 3) has already adjusted, please skip Step 1 and adjust
from Step 2.
• Maximum Deviation (Analog Wide/Narrow) is common with all the analog signaling deviations and CW ID Deviation (NXDN Very Narrow). If Balance
and Maximum Deviation (Analog Wide/Narrow) (Transmitter Section 5) have already adjusted, please skip Step 2 and adjust from Step 3.
Receiver Section
Item
Panel tuning mode
1. AF level [Panel test mode]
setting 1) CH-Sig: 1-1
SSG output:
–47dBm (1mV)
(MOD: 1kHz/±1.5kHz)
Wide/Narrow
: Narrow
Beat Shift: Uncheck
Compander: Uncheck
2. Sensitivity 1 * This adjustment can
be performed only
in PC test mode.
3. Sensitivity 2 * This adjustment can
be performed only
in PC test mode.
78
ADJUSTMENT
Wide
Step 1. Balance adjust
-
Step 2. Maximum Deviation (NXDN Narrow)
-
Condition
PC test mode
equipment
1) Test Channel SSG
Channel: 1 DVM
Test Signaling AF VTVM
Mode: Analog Dummy
Signaling: 1 load
Wide/Narrow
: Narrow
Beat Shift: Uncheck
Compander: Uncheck
SSG output:
–47dBm (1mV)
(MOD: 1kHz/±1.5kHz)
1) Adj item: SSG
[Sensitivity 1] AF VTVM
2) Adj item: [Low], Dummy
[Low'], [Center], load
[High'], [High] Oscilloscope
Press [Apply All]
button to store the
adjustment value.
3) Adj item: [Low'],
[Center], [High'],
[High]
Press [Apply All]
button to store the
adjustment value.
1) Adj item:
[Sensitivity 2]
2) Adj item: [Low],
[Low'], [Center],
[High'], [High]
Press [Apply All]
button to store the
adjustment value.
3) Adj item: [Low]
Press [Apply All]
button to store the
adjustment value.
Necessary adjustment and order
Narrow
-
Measurement
Test-
Unit Terminal Unit
Panel ANT Panel
SP/MIC
connector
Panel ANT
SP/MIC
connector
Very Narrow
Step 1. Balance adjust
Step 2. Maximum Deviation (NXDN Very Narrow)
Step 1. Balance adjust
Step 2. Maximun Deviation (Analog Narrow)
Step 3. CW ID Deviation (NXDN Very Narrow)
Adjustment
Specifi cations /
Parts Method
Volume Turn the Volume 0.63V±0.1V
knob Knob to obtain
0.63V AF output.
[PC test Write the value as Note:
mode] followings. The Preset value of
[ ],[ ] [Low]: 15 (Fixed) Sensitivity 2 must
[Low']: 35 (Preset) be written before
[Center]: 80 (Preset) adjusting Sensitivity
[High']: 135 (Preset) 1.
[High]: 180 (Preset)
Decrease the ad-
justment value from
the preset value to
get 12dB SINAD.
SSG output:
–119dBm (0.25µV)
(MOD: 1kHz/±1.5kHz)
Write the value as
followings.
[Low]: 190 (Preset)
[Low']: 165 (Fixed)
[Center]: 165 (Fixed)
[High']: 165 (Fixed)
[High]: 165 (Fixed)
Decrease the ad-
justment value from
the preset value to
get 12dB SINAD.
SSG output:
–119dBm (0.25µV)
(MOD: 1kHz/±1.5kHz)
Remarks