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NXR-800H
126
ADJUSTMENT
Item
Condition
Measurement
Adjustment
Specifi cations / Remarks
Test-
equipment
Unit
Terminal
Unit
Parts
Method
29. TD
Deviation
1) Channel: 3 (Center)
Wide/Narrow: Analog Wide
Connect the deviation meter
to the TX ANT end via the ATT.
Deviation meter setting
HPF: OFF, LPF: 3kHz
De-emp: OFF
Detector: +peak, –peak
AG setting
: 0.1kHz/0.5Vp-p (177mVrms)
Deviation
meter
AG
DVM
Rear
TX ANT
CONTROL
I/O jack
TD (pin 8)
PC
ADJ
±0.75kHz
±0.02kHz
Connect the deviation meter
to the TX ANT end via the
ATT.
2) Channel: 3 (Center)
Wide/Narrow: Analog Narrow
±0.75kHz
±0.02kHz
30. Transmit
Audio Input
(TA)
1) Channel: 3 (Center)
Wide/Narrow: Analog Wide
Connect the deviation meter
to the TX ANT end via the ATT.
Deviation meter setting
HPF: OFF, LPF: 15kHz
De-emp: OFF
Detector: +peak, –peak
AG setting
: 1kHz/280mVrms
Deviation
meter
AG
DVM
Rear
TX ANT
CONTROL
I/O jack TA
(pin 9)
PC
ADJ
±3.00kHz
±0.03kHz
Connect the deviation meter
to the TX ANT end via the
ATT.
2) Channel: 3 (Center)
Wide/Narrow: Analog Narrow
±1.50kHz
±0.02kHz
31. BPF
1) Tracking generator
Output: –20dBm
Spectrum analyzer
Frequency: Desired frequency
Span: 50MHz
Tracking
generator
Spectrum
analyzer
Rear
RX
RX ANT
CN41
RX
L132
L133
L134
L135
Adjust it by the pro-
grammed frequency
to look like the wave
in fi gure 1.
Refer to Fig. 1. (Page 130)
32. MCF
1) Wide
Tracking generator
Output: –20dBm
Spectrum analyzer
Frequency: 49.95MHz
Span: 100kHz
Tracking
generator
Spectrum
analyzer
Rear
RX
CN46
CN47
RX
L46
L52
L74
L90
Adjust it to look like
the wave in fi gure 2.
Refer to Fig. 2. (Page 130)
2) Narrow
Spectrum analyzer
Span: 50kHz
L47
L53
L75
L91
Adjust it to look like
the wave in fi gure 3.
Refer to Fig. 3. (Page 130)
33. Discriminator 1) Narrow
Frequency: Desired frequency
SSG output: –53dBm (501µV)
SSG MOD: 1kHz
SSG DEV: 1.5kHz
AF output: 2V/4
Ω
SSG
AF VTVM
Rear
RX ANT
TEST/
SPKR
jack SPO
(pin 12)
4
Ω
load
RX
L128
Adjust AF output
max.
34. RD Level
1) Wide/Narrow: Analog Wide
Connect the SSG to the RX
ANT.
SSG setting
Frequency: Desired frequency
Output: –53dBm (501µV)
MOD: 1kHz
DEV: ±3.0kHz
SSG
AF VTVM
Rear
RX ANT
CONTROL
I/O jack
RD (pin 10)
PC
ADJ
80mV
±5mV
2) Wide/Narrow: Analog Narrow
SSG setting
DEV: ±1.5kHz
Содержание NXR-800H
Страница 180: ...1 E CN300 RX_IF_VN 168 ...