1-8. TRIAX Interface System Adjustment
1-8-8. MIC 2 Demodulation Adjustment1-8-9. MIC 2 Level Adjustment
Rank:CRank:B
Note:Perform the adjustment only whenEquipment:Oscilloscope, Audio generator
replacing 1T251/AU-231 board.To be extended:AU-231 board
Preparations:
Equipment:Oscilloscope, Audio generator. S102 (MIC 2 GAIN) switch/AT-111 board ? OMIN�
To be extended:AU-231 board. Feed the 1kHz, 2.2 mVp-p (_60 dBu) sine wave signal
Preparations:from the audio generator to the MIC IN connector on the
. S102 (MIC 2 GAIN) switch/AT-111 board � +MIN+CA-550/550P or AUDIO IN 2 connector on the CA-570/
. Feed the 1 kHz, 2.2 mVp-p (_60 dBu) sine wave signal570P.
from the audio generator to the MIC IN connector on the.Fig-3 (Refer to 1-1-4. Audio connection.)
CA-550/550P or AUDIO IN 2 connector on the CA-570/Test point:TP252 (GND: E1)/AU-231 board
570P.Adjustment point:1RV251 (MIC 2 LEVEL)/
.Fig-3 (Refer to 1-1-4. Audio connection.)AU-231 board
Test point:TP251 (GND: E1)/AU-231 board Specifications:A = 1100 ?50 mV p-p
Adjustment Procedures:
1. Adjust the white core of 1T251/AU-231 board slowly
so that the DC level at TP251 (GND: E1) /AU-231A = 1100 ?50 mV p-p
board is 1.24 ?0.01 V dc.
1.24 ?0.01 V dc
GND
2. Set the input range of oscilloscope to AC mode, and
adjust the blue core of 1T251/AU-231 board so that
the sine wave is minimum.
minimumE3
GTP601
RV151
TP701
TP152 TP252TP202
S251 S201
FRV101
TP151
RV251RV201
TP102T151
LV21TP21
3. Repeat procedure 1.ETP251 TP201
LV1TP1T251T201
LV101
D
LV61
RV61TP101
TP51
CLV41
RV41
TP31
B
E1
A
12RV503RV7013
456
RV501RV601
AU-231 BOARD (A SIDE)
1-38 (E)CCU-550A/550AP MMP2 |