Receiver Section - Kenwood NX-340 Service Manual
Uhf digital transceiver
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Also See for NX-340:
- Service manual (44 pages) ,
- Function reference (235 pages) ,
- Instruction manual (84 pages)
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Item
6. Maximum
(1)TEST CH: Low, Low', Center,
Deviation
High', High (5 point)
(NXDN Very
(2)Deviation meter filter
Narrow)
LPF: 15kHz
HPF: OFF
*Note 4
(3)PTT ON
7. CW ID Devi-
(1)TEST CH: Center
ation (NXDN
(2)Deviation meter filter
Very Narrow)
LPF: 15kHz
HPF: OFF
*Note 4
(3)PTT ON
8. DQT
(1)TEST CH: Center
Deviation
(2)Deviation meter filter
(Analog Nar-
LPF: 3kHz
row)
HPF: OFF
(3)PTT ON
9. QT Deviation
(1)TEST CH: Center
(Analog Nar-
(2)Deviation meter filter
row)
LPF: 3kHz
HPF: OFF
(3)PTT ON
10. DTMF
(1)TEST CH: Center
Deviation
(2)Deviation meter filter
(Analog Nar-
LPF: 15kHz
row)
HPF: OFF
(3)PTT ON
11. MSK
(1)TEST CH: Center
Deviation
(2)Deviation meter filter
(Analog Nar-
LPF: 15kHz
row)
HPF: OFF
(3)PTT ON
*Note 3:
Only 1 DQT Balance needs to be adjusted (either DQT Balance 1 or DQT Balance 2).
*Note 4:
For the adjustment of the Maximum Deviation (NXDN Very Narrow) and CW ID Deviation (NXDN Very Narrow).
After adjusting the DQT Balance and Maximum Deviation (Analog), it is necessary to adjust the Maximum Deviation (NXDN Very
Narrow) and CW ID Deviation (NXDN Very Narrow).
4.7
Receiver Section
Item
1. RX Sensitivity
(1)TEST CH: Low, Center, High (3 point)
(Semiautomatic)
(2)SSG output: -90dBm (7.08uV)
AF Freq : 1kHz
*Note 5
Mod Dev : ±1.5kHz
2. Open Squelch 5
(1)TEST CH: Low, Center, High (3 point)
(Analog Narrow)
(2)SSG output: -121dBm (0.2uV)
AF Freq : 1kHz
Mod Dev : ±1.5kHz
2. Open Squelch 5
(1)TEST CH: Low, Center, High (3 point)
(NXDN Very Narrow)
(2)SSG output: -124dBm (0.14uV)
AF Freq : 400Hz
Mod Dev : ±1.1kHz
Condition
Test-
equipment
Deviation
meter
Oscillo-
scope
Deviation
meter
Oscillo-
scope
Deviation
meter
Oscillo-
scope
Deviation
meter
Oscillo-
scope
Deviation
meter
Oscillo-
scope
Deviation
meter
Oscillo-
scope
Condition
Measurement
Unit Terminal Unit
ANT
ANT
ANT
ANT
ANT
ANT
Measurement
Test-
Unit Terminal Unit Parts
equipment
SSG
ANT
Oscilloscope
Audio
Analyzer
SSG
ANT
Oscilloscope
Audio
Analyzer
SSG
ANT
Oscilloscope
Audio
Analyzer
Adjustment
Parts
Method
FPU 1.337kHz
FPU 1.00kHz
FPU 0.35kHz
FPU 0.35kHz
FPU 1.5kHz
FPU 1.5kHz
Adjustment
Method
FPU Press [Start]
(Auto tuning)
FPU Press [Start]
(Auto tuning)
FPU Press [Start]
(Auto tuning)
(No.RA003<Rev.004>)1-19
Specifica-
tions
/Remarks
±50Hz
±100Hz
±40Hz
±40Hz
±50Hz
±50Hz
Specifica-
tions
/Remarks
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