Incom Deviation Adjustment; Data Rf Adjustment - Sony BVP-500 Maintenance Manual

5-23. Audio Modulation/Demodulation Adjustment

5-23-7. INCOM DEVIATION Adjustment

5-23-8. DATA RF Adjustment

5-23-7. INCOM DEVIATION Adjustment
Note :
• This adjustment requires longer warm-up periods (10 to
30 minutes).
Equipment : Spectrum analyzer
Audio generator
Preparations :
• SW1 (INCOM MIC SEL)/AU-211 panel→ D
• Feed an 1.0-kHz, -60 dBu (2.2 mVp-p) sine wave signal
from the audio generator to the INTERCOM connector.
(Refer to Section 5-1-4 "Connection —For audio
adjustments".
Test Point : TP1/TR-90 (E-2)
Adjustment Point : 1RV1 (INCOM DEV)/TR-90 (E-4)
: A = 20.0 ±0.8 kHz
Specifications
CENTER FREQ 7.1 MHz
SPAN 50 kHz
RBW 1 kHz
Resetting after Adjustment:
• SW1/AU-211 panel → C
5-32
5-23-8. DATA RF Adjustment
Notes :
• This adjustment requires longer warm-up periods (10 to
30 minutes).
• Use a plastic core driver to adjust 1LV.
Equipment : Spectrum analyzer
Test Point : TP5/TR-90 (F-2)
Adjustment Point : 1LV4 (5.6 MHz)/TR-90 (F-2)
: Center frequency 5,600 ±5 kHz
Specifications
CENTER FREQ 5,600 kHz
SPAN 100 kHz
RBW 1 kHz
4
TR
A
B
C
D
RV1
E
F
G
TR-90 BOARD (A SIDE)
3 2 1
TP1
TP5
LV4
BVP-500
BVP-500P