NX-820
82
ADJUSTMENT
Receiver Section
Item
Condition
Measurement
Adjustment
Specifi cations/
Remarks
Panel tuning mode
PC test mode
Test-
equipment
Unit
Termi-
nal
Unit
Parts
Method
1.AF level
setting
[Panel test mode]
1) CH-Sig: 1-1
SSG output:
–47dBm (1mV)
(MOD: 1kHz/±1.5kHz)
Wide/Narrow: Nar-
row
Beat Shift: Uncheck
Compander: Un-
check
1) Test Channel
Channel: 1
Test Signaling
Mode: Analog
Signaling: 1
Wide/Narrow: Narrow
Beat Shift: Uncheck
Compander: Uncheck
SSG output:
–47dBm (1mV)
(MOD: 1kHz/±1.5kHz)
SSG
DVM
AF VM
4
Dummy
load
Oscillo-
scope
ANT
Ext.SP
con-
nector
[Panel
tuning
mode]
[ ],
[ ]
[PC test
mode]
[
],
[
]
Volume Up/Down
Key to obtain
2.83V AF output.
(2.0W @ 4
load)
2.83V±0.3V
( Volume Button in PC
test mode screen)
2. Sensitivity 1
This adjustment
can be performed
only PC test mode.
1) Adj item:
[Sensitivity 1]
2) Adj item: [Low],
[Low’], [Center],
[High’], [High]
Press [Apply All]
button to store the
adjustment value.
SSG
AF VM
4
Dummy
load
Distortion
meter
Oscillo-
scope
ANT
Ext.SP
con-
nector
[PC test
mode]
[
],
[
]
Write the value as
followings,
[Low]:34 (Preset)
[Low’]:75 (Preset)
[Center]: 117
(Fixed)
[High’]: 155 (Fixed)
[High]: 1
9
2 (Fixed)
3. Sensitivity 2
This adjustment
can be performed
only PC test mode.
1) Adj item:
[Sensitivity 2]
2) Adj item: [Low],
[Low’], [Center],
[High’], [High]
Press [Apply All]
button to store the
adjustment value.
SSG
AF VM
4
Dummy
load
Distortion
meter
Oscillo-
scope
ANT
Ext.SP
con-
nector
[PC test
mode]
[
],
[
]
Write the value as
followings,
[Low]: 5
9
(Preset)
[Low’]:
9
8 (Preset)
[Center]: 137
(Preset)
[High’]: 17
9
(Preset)
[High]: 20
9
(Preset)
*Note
*Note:
12dB SINAD or more at -118.5dBm (Mod: 1kHz/±1.5kHz) with preset digit value at each adjustment point.
If less than 12dB SINAD, execute the "Readjustment method 1" procedure at the failed adjustment point.
[Readjustment method1]
Decrease the digit value to get 12dB SINAD at -118.5dBm (Mod: 1kHz/±1.5kHz).
If it is still NG, execute the "Readjustment method 2" procedure.
[Readjustment method2]
If the sensitivity is still NG for [Low] or [Low’] point by using method1, conduct the following procedure.
1. Change the data of the failed adjustment point. ([Low] or [Low’]) to the following, and store it.
Sens1 Sens2
[Low] 54 6
9
[Low’]
9
5 108
2. Open Sensitivity1, and select the failed adjustment point.
3. Set SSG to the following.
SSG Output: -118.5dBm (0.266uV) MOD: 1kHz/±1.5kHz
4. Decrease the data until the sensitivity becomes 12dB SINAD.
5. Press [Apply All] button.
4. RSSI
reference
*5
[Analog
Narrow]
1) Adj item: [RRSS]
Adjust: [
]
2) Adj item:
[R.RSS]
[R.R.SS]
[R.R.S.S]
[R.R.S.S.]
[R.R.S.S._.]
SSG output: 12dB
SINAD level -3dB
(MOD: 1kHz/±1.5kHz)
1) Adj item:
[RSSI Reference
(Analog Narrow)]
2) Adj item: [Low],
[Low’], [Center],
[High’], [High]
SSG output: 12dB
SINAD level –3dB
(MOD: 1kHz/±1.5kHz)
SSG
AF VM
4
Dummy
load
Distortion
meter
Oscillo-
scope
ANT
Ext.SP
con-
nector
[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.
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