3-4 (E)
CA-550
CA-550P
3-3. TR-90 Board Adjustment
This adjustment requires longer warm-up periods (10 to 30
minutes).
3-3-1. MIC 1 RF Adjustment
Note :
• Use a plastic core driver to adjust 1LV.
Equipment : Frequency counter
Test Point : TP2/TR-90 (E-2)
Adjustment Point : 1LV2 (6.2 MHz)/TR-90 (E-3)
Specifications : 6,200 ±5 kHz
3-3-2. MIC 2 RF Adjustment
Note :
• Use a plastic core driver to adjust 1LV.
Equipment : Frequency counter
Test Point : TP4/TR-90 (F-2)
Adjustment Point : 1LV3 (6.7 MHz)/TR-90 (F-3)
Specifications : 6,700 ±5 kHz
3-3-3. MIC 1 DEVIATION Adjustment
Equipment : Spectrum analyzer
Audio generator
Preparations :
• SW6 (MIC LINE SEL)/AU-211 (E-4) → MIC 1
• CCU-700/700P/700A/700AP setting
S1003 (MIC LEVEL CH1)/AT-88 panel→ NORM
• Feed an 1.0-kHz, –60 dBu (2.2 mVp-p) sine wave signal
from the audio generator to the MIC connector on the
BVP-550/550P. (Refer to Section 3-1-3 “Connection—
For audio adjustments”.
Test Point : TP2/TR-90 (E-2)
Adjustment Point : 1RV2 (MIC1 DEV)/TR-90 (E-4)
Specifications : A = 16.0 ±0.8 kHz
A
1
234
B
C
D
E
F
G
TR
LV2
LV3
RV2
TP2
TP4
TR-90 BOARD (COMPONENT SIDE)
3-3. TR-90 Board Adjustment
CENTER FREQ 6.2 MHz
SPAN 50 kHz
RBW 1 kHz
Note :
After the adjustment is complete, be sure to return S1003/
AT-88 to its customer-set position.
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