6-62
3-15. REC Y LEVEL ADJUSTMENT
Purpose :
Maintains a constant level of Y FM, chroma
AFM and ATF signals when recording on tape.
Adjustment error :
(If level is low) Poor S/N of playback picture
(If level is high) Black streaking noise appears.
Connection :
Connect CN102 pin
8
(RF SWP) to GND.
Mode
CAM-REC (SP)
Signal
No signal
Measurement Point
CN102 pin
2
(check connector)
Measuring Instrument
Oscilloscope (Note)
Adjustment Page
F
Adjustment Address
35
Specification Value
A=132 ± 5mVp-p (PAL)
A=155 ± 5mVp-p (NTSC)
Adjustment procedure:
Note :
Use the MP type tape. If an oscilloscope has the bandwidth
limiting switch, set to on position.
Order
Page
Address
Data
Procedure
1
6
00
01
After setting the data, press the PAUSE button. (Preparation)
2
Insert the MP tape to establish record mode.
3
6
01
Read the data of page : 6, address : 01, and record it.
4
6
01
43
After setting the data, press the PAUSE button.
5
F
35
Change data using PLAY and STOP buttons so that the REC Y RF level (A) satisfies the
specification.
6
Press the PAUSE button.
7
6
01
Set the data which is recorded in step 3 to this address and, press the PAUSE button.
8
6
00
00
After setting the data, press the PAUSE button. (End)
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