(No.RA011<Rev.001>)1-27
*Note 2:
Only 1 DQT Balance need to align(either DQT Balance1 or DQT Balance2)
*Note 3:
(for the NXDN Very Narrow Maximum Deviation and CW ID Deviation alignment)
Must
do the NXDN Very Narrow Maximum Deviation and CW ID Deviation alignment after the DQT Balance alignment and Maxi-
mum Deviation alignment (Analog).
4.6
Receiver Section
12. MSK
Deviation
(Analog
Narrow)
1) Test CH : Center ( 1 point )
2) Deviation meter filter
LPF : 15kHz
HPF : OFF
3) PTT ON ( Transmit )
Deviation
Meter
Oscilloscope
ANT
FPU 1.5kHz
±50Hz
Item
Condition
Measurement
Adjustment
Specifications
/Remarks
Test-
equipment
Unit Terminal Unit Parts
Method
Item
Condition
Measurement
Adjustment
Specifica-
tions
/Remarks
Test-
equipment
Unit Terminal Unit Parts
Method
1. Receive
Sensitivity
[Semiauto-
matic]
1) Test CH : Low, Low', Center,
High', High ( 5 point )
2) SSG output : -90dBm
AF Freq : 1kHz
Mod Dev : ±1.5kHz
SSG
Oscilloscope
Audio
Analyzer
ANT
FPU Press [Start], [Auto
tuning]
2. Open
Squelch (5)
[Analog Narrow]
1) Test CH : Low, Low', Center,
High', High ( 5 point )
2) SSG output : -120dBm
AF Freq : 1kHz
Mod Dev : ±1.5kHz
SSG
Oscilloscope
Audio
Analyzer
ANT
FPU Press [Start], [Auto
tuning]
[NXDN Very Narrow]
1) Test CH : Low, Low', Center,
High', High ( 5 point )
2) SSG output : -124dBm
AF Freq : 400Hz
Mod Dev : ±1.1kHz
SSG
Oscilloscope
Audio
Analyzer
ANT
FPU Press [Start], [Auto
tuning]
3. Tight
Squelch
[Analog Narrow]
1) Test CH : Low, Low', Center,
High', High ( 5 point )
2) SSG output : -116dBm
AF Freq : 1kHz
Mod Dev : ±1.5kHz
SSG
Oscilloscope
Audio
Analyzer
ANT
FPU Press [Start], [Auto
tuning]
4. Low RSSI
*Note 4
[Analog Narrow]
1) Test CH : Low, Low', Center,
High', High ( 5 point )
2) SSG output : -120dBm
AF Freq : 1kHz
Mod Dev : ±1.5kHz
SSG
Oscilloscope
Audio
Analyzer
ANT
FPU Press [Start], [Auto
tuning]
[NXDN Very Narrow]
1) Test CH : Low, Low', Center,
High', High ( 5 point )
2) SSG output : -120dBm
AF Freq : 1kHz
Mod Dev : ±1.5kHz
SSG
Oscilloscope
Audio
Analyzer
ANT
FPU Press [Start], [Auto
tuning]
Содержание NX-840
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