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NEXEDGE NX-800 series
Service manual
Adjustment; Nx-800/800H(K,K2) Receiver Section - Kenwood NX-800 Service Manual
Uhf digital transceiver
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Also See for NX-800
:
Service manual
(161 pages)
,
Specifications
(2 pages)
,
Function reference
(608 pages)
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NX-800/800H
NX-800/800H(K,K2) Receiver Section
Item
Panel test mode
1. AF level
[Panel test mode]
setting
1) CH-Sig: 1-1
SSG output:
–47dBm (1mV)
(MOD: 1kHz,
Dev: ±1.5kHz)
2. Sensitivity 2
1) Adj item: [SENS2]
Adjust
Adjust: [***]
(BPF adjust)
2) Adj item:
[L SENS2]Õ
[L' SENS2]Õ
[C SENS2]Õ
[H' SENS2]Õ
[H SENS2]
Adjust: [***]
Press [<] key to store
the adjustment value.
3. Sensitivity 1
1) Adj item: [SENS1]
Adjust
Adjust: [***]
(BPF adjust)
2) Adj item:
[L SENS1]Õ
[L' SENS1]Õ
[C SENS1]Õ
[H' SENS1]Õ
[H SENS1]
Adjust: [***]
Press [<] key to store
the adjustment value.
20
ADJUSTMENT
Condition
PC test mode
equipment
1) Test Channel
SSG
Channel: 1
DVM
Test Signaling
AF VTVM
Mode: Analog
Dummy
Signaling: 1
load (4Ω)
SSG output:
–47dBm (1mV)
(MOD: 1kHz,
Dev: ±1.5kHz)
1) Adj item:
[Sensitivity 2]
2) Adj item: [Low],
[Low'], [Center],
[High'], [High]
Press [Apply All]
button to store the
adjustment value.
1) Adj item:
[Sensitivity 1]
2) Adj item: [Low],
[Low'], [Center],
[High'], [High]
Press [Apply All]
button to store the
adjustment value.
Measurement
Test-
Unit
Unit Parts
Terminal
ANT
Ext.SP
connec-
tor
Adjustment
Specifi cations /
Method
Volume Up/Down
2.83V±0.3V
[Panel
tuning
knob to obtain
mode]
2.83V AF output.
[ ],[ ]
(2.0W @ 4Ω load)
[PC test
mode]
[ ],[ ]
(Volum
Button in
PC test
mode
screen)
[Panel
Write the value as
Variable-Capacitor
tuning
followings (Fixed).
Tune voltage is
[L SENS2] / [Low]
adjusted.
mode]
[ ],[ ]
: 60 K,HK
(Output voltage ad-
50 K2,HK2
justment of IC205)
[L' SENS2] / [Low']
[PC test
mode]
: 95 K,HK
[ ],[ ]
88 K2,HK2 K2,HK2
[C SENS2] / [Center]
: 130 K,HK,
125 K2,HK2
[H' SENS2] / [High']
: 165 K,HK,
174 K2,HK2
[H SENS2] / [High]
: 200 K,HK,
222 K2,HK2
Write the value as
Variable-Capacitor
followings (typical
Tune voltage is
value).
adjusted.
[L SENS2] / [Low]
(Output voltage ad-
: 80 K,HK
justment of IC206)
71 K2,HK2
(Fixed)
If sensitivity is low,
[L' SENS2] / [Low']
fine-tune the value.
: 120 K,HK
107 K2,HK2
[H SENS1] / [High]
(Fixed)
Check Sens1
[C SENS2] / [Center]
FH(Narrow)
: 150 K,HK
RX Sensitivity >12dB
138 K2,HK2
at SSG output:
(Fixed)
-118.5dBm
[H' SENS2] / [High']
(0.266uV).
: 180 K,HK
If RX Sensitivity Out
157 K2,HK2
of Specification,
(Fixed)
set SSG output:
[H SENS2] / [High]
-90dBm (7.08uV),
: 200 K,HK
FM:1.5kHz,
180 K2,HK2
Align Sens 1 FH to
(Preset)
the last RSSI peak,
and -30 digit shift
from the last RSSI
peak.
Remarks
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