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6-59
3-12. Y FM DEVIATION ADJUSTMENT (NOTE)
Purpose :
Adjusts the FM signal to be recorded on tape
to the 8mm format. (Adjusts the frequency
deviation of normal mode Y FM signal.)
to the 8mm format. (Adjusts the frequency
deviation of normal mode Y FM signal.)
Adjustment error :
Too bright or too dark overall picture.
Overmodulation picture. (If deviation is too
wide, or too narrow.)
Overmodulation picture. (If deviation is too
wide, or too narrow.)
Mode
CAM-REC and playback
Signal
Color bar chart
Measurement Point
• VIDEO output terminal
(terminated in 75
(terminated in 75
Ω
)
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
2F
Specification Value
A=(Vo
×
0.96)Vp-p ± 2%
Note :
The “Emphasis input level adjustment”, “PB Y level
adjustment”, must have already been completed.
Adjustment procedure:
Related Adjustments:
“Normal mode Y FM deviation adjustment”
“Normal mode Y FM deviation adjustment”
Order
Page
Address
Data
Procedure
1
Insert a normal MP type tape.
2
6
00
01
After setting the data, press the PAUSE button. (Preparation)
3
6
01
Read the data of page : 6, address : 01, and record it.
4
6
01
47
After setting the data, press the PAUSE button.
5
Shoot and record the color bar chart. The video out level at that setup is “Vo”.
6
Playback the recorded signal.
7
Compare the playback signal level (A) with the specification value. If the specification
value is satisfied, the adjustment is complete.
value is satisfied, the adjustment is complete.
8
F
2F
If the specification value is satisfied, change data using PLAY and STOP buttons.
• If the playback signal level is bigger than the specification value, decrease the data.
• If the playback signal level is smaller than the specification value, increase the data.
• If the playback signal level is bigger than the specification value, decrease the data.
• If the playback signal level is smaller than the specification value, increase the data.
9
Press the PAUSE button.
10
Return to step 4.
11
6
01
Set the data which is recorded is step 3 to this address and, press the PAUSE button.
12
6
00
00
After setting the data, press the PAUSE button. (End)
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