Kenwood NX-720 Service Manual page 82

NX-720
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 5k/Narrow:
Narrow
Beat Shift:
Uncheck
Compander:
Uncheck
2. Sensitivity 1 This adjustment
can be performed
only PC test mode.
3. Sensitivity 2 This adjustment
can be performed
only PC test mode.
4. RSSI 1) Adj item: [RRSS]
reference Adjust: [.]
*5 2) Adj item:
[R.RSS]
[R.R.SS]
[Analog
[R.R.S.S]
Narrow]
[R.R.S.S.]
[R.R.S.S._.]
SSG output: 12dB
SINAD level -3dB
(MOD: 1kHz/±1.5kHz)
82
ADJUSTMENT
Condition
PC test mode
equipment
1) Test Channel SSG
Channel: 1 DVM
Test Signaling AF VM
Mode: Analog 4
Signaling: 1 Dummy
Wide 5k/Narrow: load
Narrow Oscillo-
Beat Shift: Uncheck scope
Compander:
Uncheck
SSG output:
–47dBm (1mV)
(MOD: 1kHz/±1.5kHz)
1) Adj item: SSG
[Sensitivity 1] AF VM
2) Adj item: [Low], 4
[Low'], [Center], Dummy
[High'], [High] load
Press [Apply All] Distortion
button to store the meter
adjustment value. Oscillo-
scope
1) Adj item: SSG
[Sensitivity 2] AF VM
2) Adj item: [Low], 4
[Low'], [Center], Dummy
[High'], [High] load
Press [Apply All] Distortion
button to store the meter
adjustment value. Oscillo-
scope
1) Adj item: SSG
[RSSI Reference AF VM
(Analog Narrow)] 4
2) Adj item: [Low], Dummy
[Low'], [Center], load
[High'], [High] Distortion
SSG output: 12dB meter
SINAD level –3dB Oscillo-
(MOD: 1kHz/±1.5kHz) scope
Measurement
Test-
Unit Terminal Unit
ANT
Ext.SP
con-
nector
ANT
Ext.SP
con-
nector
ANT
Ext.SP
con-
nector
ANT
Ext.SP
con-
nector
Adjustment
Parts Method
[Panel Volume Up/Down 2.83V±0.3V
tuning Key to obtain (Volume Button in PC
mode] 2.83V AF output. test mode screen)
[ ], (2.0W @ 4 load)
[ ]
[PC test
mode]
[ ],
[ ]
[PC test Write the value as Increase the adjust-
mode] followings, ment value from the
[Low]: 61 (Preset) preset value to get
[ ],
[Low']: 85 (Preset) 12dB SINAD.
[ ]
[Center]: 103 SSG output: -119dBm
(Preset) (0.25uV)
[High']: 122 (Mod: 1kHz/±1.5kHz)
(Preset) Note:
[High]: 152 The fi xed value of
(Preset) Sensitivity 2 must be
written before adjust-
ing Sensitivity 1.
[PC test Write the value as
mode]
followings,
[Low]: 48 (Fixed)
[ ],
[Low']: 75 (Fixed)
[ ]
[Center]: 104
(Fixed)
[High']: 132 (Fixed)
[High]: 187 (Fixed)
[Panel tuning mode]
After input signal
from SSG, press
[ ] key to store
the adjustment
value.
[PC test mode]
After input signal
from SSG, press
[Apply] button to
store the adjust-
ment value.
Specifi cations/
Remarks