Kenwood NX-820H Service Manual page 53

Item Panel test mode
This adjustment can
2. Sensitivity 1
adjust
be performed only
PC test mode.
3. Sensitivity2 *This adjustment can
adjust be performed only
PC test mode.
ADJUSTMENT
Measurement
PC test mode
Test-
equipment
1) Adj item: SSG
[Sensitivity 1] AF VTVM
4ohm
2) Adj item: [Low], Dummy
[Low'], [Center], load
[High'], [High]
Press [Apply All]
button to store
the adjustment
value.
1) Adj item: SSG
[Sensitivity 2] AF VTVM
4ohm
2) Adj item: [Low], Dummy
[Low'], [Center], load
[High'], [High]
Press [Apply All]
button to store
the adjustment
value.
NX-820H(G)/820H
Unit Terminal Unit Parts
ANT [PC test
Ext.SP
mode]
connector
[ ],[
ANT [PC test
Ext.SP mode]
connector
[ ],[
Adjustment
Specifi cations/
Method
Write the value as
followings :K
[L SENS1] / [Low]: 30
]
(Fixed)
[L' SENS1] / [Low']: 96
(Fixed)
[C SENS1] / [Center]:
134 (Fixed)
[H' SENS1] / [High']: 167
(Fixed)
[H SENS1] / [High]: 200
(Preset)
:K2
[L SENS1] / [Low]: 34
(Preset)
[L' SENS1] / [Low']: 75
(Preset)
[C SENS1] / [Center]:
117 (Fixed)
[H' SENS1] / [High']: 155
(Fixed)
[H SENS1] / [High]: 192
(Fixed)
Write the value as Readjustment method 1
follows If the sensitivity is
:K less than -118.5dBm,
]
[L SENS2] / [Low] : decrease the digit of [○
80 (Preset) SENS2] (each channel)
[L' SENS2] / [Low'] : to get 12dB SINAD.
119 (Preset) SSG output :
[C SENS2] / [Center] -118.5dBm(0.266uV)
: 158(Preset) (Mod: 1kHz / ±1.5kHz)
[H' SENS2] / [High'] : Readjustment method 2:K
190(Preset) If the sensitivity is still
[H SENS2] / [High] : NG for fH by using
225(Preset) method 1, change the
:K2 digit of [H SENS2] from
[L SENS2] / [Low] : 225 to 240, and carry
59 (Preset) out the automatic ad-
[L' SENS2] / [Low'] : justment for [H SENS1].
98 (Preset) SSG output : -90dBm
[C SENS2] / [Center] (Mod: 1kHz / ±1.5kHz)
: 137 (Preset) and then, decrease the
[H' SENS2] / [High'] : digit of [H SENS2] to
179 (Preset) get 12dB SINAD.
[H SENS2] / [High] : SSG output :
209 (Preset) -118.5dBm(0.266uV)
(Mod: 1kHz / ±1.5kHz)
Readjustment method 2:K2
If the sensitivity is still
NG for fL & fL' by using
method 1, change the
digit as follows.
[L SENS1] : 34 ➞ 54
[L' SENS1] :75 ➞ 95
[L SENS2] : 59 ➞ 69
[L' SENS2] : 98 ➞ 108
And then, decrease
the digit of [L SENS1]
& [L' SENS1] to get
12dB SINAD.
SSG output :
-118.5dBm(0.266uV)
(Mod: 1kHz / ±1.5kHz)
Remarks
53