Kenwood NX-3720, Service Manual

Page: 100 / 210

1-100 (No.RA054<Rev.001>)
4.25 Common Section
6.
Sensitivity
check 1)CH-Sig: 1-1
SSG output
Wide:
-117dBm
(0.32
μ V)
(MOD:
1kHz/±3kHz)
Narrow:
-117dBm
(0.32
μ
V)
(MOD: 1kHz/
±1.5kHz)
1)Test Channel
Channel: 1
Test Signaling
Type: Analog
Signaling: 1
SSG output
Wide:
-117dBm (0.32
μ
V)
(MOD: 1kHz/±3kHz)
Narrow:
-117dBm (0.32
μ V)
(MOD: 1kHz/±1.5kHz)
SSG
AF VM
Oscilloscope
Distortion
meter
4ohm
Dummy load Panel ANT
Ext. SP
connector
Check 12dB SINAD
or more
Item Condition Measurement Adjustment Specifications
/Remarks
Panel test
mode
PC test mode Test-
equipment
Unit Terminal Unit Parts Method
Item Condition Measurement Adjustment Specifications
/Remarks
Panel tuning
mode
PC test mode Test-
equipment
Unit Terminal Unit Parts Method
1.
Setting 1) DC voltage:13.6V
2) SSG standard modulation
[Wide] MOD:1kHz,DEV:3kHz
[Narrow] MOD:1kHz,DEV:1.5kHz
2.LCD
Contrast 1) Adj item
[CNTR]
Adjust:[****]
Press [ ]
button to
store the
adjustment
value.
1) Adj item
[LCD Contrast]
Data: [****]
Press [Apply]
button to store the
adjustment value.
Panel [Panel
tuning
mode]
[

],
[

]
[PC
test
mode]
[+], [-]
Write the value as
followings.
280 (Reference value)
3.
VCO
Assist 1) Adj item:
[AST]
Adjust:[****]
2) Adj item:
[L1]
→
[L2]
→
[L3]
→
[L4]
→
[L5]
→
[L6]
→
[C1]
→
[C2]
→
[C3]
→
[C4]
→
[C5]
→
[H1]
→
[H2]
→
[H3]
→
[H4]
→
[H5]
→
[H6]
Adjust:[****]
Press [ ]
button to
store the
adjustment
value.
1) Adj item:
[VCO Assist]
2) Adj item:
[Low1],[Low2],
[Low3],[Low4],
[Low5], [Low6]
[Center1],
[Center2],
[Center3],
[Center4],
[Center5],
[High1],[High2]
[High3],[High4],
[High5][High6]
Press [Apply]
button to store the
adjustment value.
Panel [Panel
tuning
mode]
[

],
[

]
[PC
test
mode]
[+], [-]
[PC test mode]
[Automatic
Adjustment]
1) Press [Autotune]
button.
2) Press [Apply] button
to store the adjustment
value after the
automatic adjustment
has finished.
[Manual Adjustment]
[V] Indicator on the PC
window shows VCO
lock voltage. Change
the adjustment value
to get VCO lock
voltage within the limit
of the specified
voltage.
Note:
Confirm the VCO
lock voltage
approximately 3
seconds after the
adjustment value is
changed.
2.5V±0.1V
[Automatic
Adjustment]
After the
automatic
adjustment is
performed,
verify that the
VCO lock
voltage is within
the voltage
range which is
specified by the
manual
adjustment.
[Manual
Adjustment]
Press [Apply]
button to store
the adjustment
value after all
adjustment
points have
been adjusted.
Adjustment
value range:
K: 1200 - 4096
K2: 500 - 1950