Kenwood NX-3720, Service Manual

Page: 147 / 210

(No.RA054<Rev.001>)1-147
4.36 Receiver Section
Item Condition Measurement Adjustment Specifica
tions
/Remarks
Panel tuning
mode
PC test mode Test-
equipment
Unit Terminal Unit Parts Method
1.
AF level
setting [Panel test mode]
1) CH-Sig: 1-1
SSG output:
-47dBm (1mV)
(MOD: 1kHz/
±1.5kHz)
1) Test Channel
Channel: 1
Test Signaling
Type: Analog
Signaling: 1
SSG output:
-47dBm (1mV)
(MOD:1kHz/
±1.5kHz)
SSG
DVM
AF VM
Dummy load Panel ANT
Ext. SP
connector
Panel [Panel
tuning
mode]
[

],
[

]
[PC
test
mode]
[+], [-]
Volume Up/Down
knob to obtain 1.41V
AF output.
(0.5W @ 4ohm load) 1.41V
±0.1V
2. IQ
Phase 1) Adj item:
[An IQ]
Adjust:[****]
2) Adj item:
[L1]
→
[L5]
→
[C3]
→
[H2]
→
[H6]
SSG output:
Freq: Tune
Freq +8kHz
level: -53dBm
(500
μ
V)
(MOD:OFF)
1) Adj item:
[IQ Phase]
2) Adj item:
[Low1]
→
[Low5]
→
[Center3]
→
[High2]
→
[High6]
SSG output:
Freq: Tune Freq
+8kHz
level: -53dBm
(500
μ
V)
(MOD:OFF)
SSG Panel ANT
Ext. SP
connector
Panel [Panel
tuning
mode]
[

],
[

]
[PC
test
mode]
[+], [-]
[PC test mode]
[Automatic
Adjustment]
After input signal from
SSG,
1) Press [Autotune]
button.
2) Press [Apply]
button to store the
adjustment value after
the automatic
adjustment has
finished.
[Manual Adjustment]
Adjust RSSI
Level(DSP Normal
Power Mode)
Value to the minimum.
3. RSSI
reference
[DSP
(Receive)] 1) Adj item:
[An RSSI 1]
Adjust:[****]
2) Adj item:
[L1]
→
[L5]
→
[C3]
→
[H2]
→
[H6]
SSG output:
12dB SINAD
level -3dB
(MOD:
1kHz/±1.5kHz)
1) Adj item:
[RSSI Reference
(Analog Narrow)
1 DSP (Receive)]
2) Adj item:
[Low1]
→
[Low5]
→
[Center3]
→
[High2]
→
[High6]
SSG output:
12dB SINAD level
-3dB
(MOD:
1kHz/±1.5kHz)
SSG
Distortion
meter
Oscilloscope Panel ANT
Ext. SP
connector
Panel [Panel tuning mode]
After input signal from
SSG, press [ ]
button to store the
adjustment value.
[PC test mode]
After input signal from
SSG,
1) Press [Acquire
Monitored Value]
button.
2) Press [Apply]
button to store the
adjustment value.
[RF IC
(Receive)] 1) Adj item:
[An RSSI 2]
Adjust:[****]
2) Adj item:
[L1]
→
[L5]
→
[C3]
→
[H2]
→
[H6]
SSG output:
12dB SINAD
level -3dB
(MOD:
1kHz/±1.5kHz)
1) Adj item:
[RSSI Reference
(Analog Narrow)
2 RF IC (Receive)]
2) Adj item:
[Low1]
→
[Low5]
→
[Center3]
→
[High2]
→
[High6]
SSG output:
12dB SINAD level
-3dB
(MOD:
1kHz/±1.5kHz)
SSG
Distortion
meter
Oscilloscope Panel ANT
Ext. SP
connector
Panel [Panel tuning mode]
After input signal from
SSG, press [ ]
button to store the
adjustment value.
[PC test mode]
After input signal from
SSG,
1) Press [Acquire
Monitored Value]
button.
2) Press [Apply]
button to store the
adjustment value.