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5-22
4-3. APC & AEQ Adjustment (VC-250 Board)
Mode
Playback
Signal
Recorded signal at “Preparations
before adjustments”
before adjustments”
Measurement Point
Pin qh of CN933 (RF MON) (Note 1)
Ext. trigger: Pin qd of CN933 (DV RF
SWP)
Ext. trigger: Pin qd of CN933 (DV RF
SWP)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
18, 19, 1B, 1C, 21, 2C
Specified Value
The data of page: 3, address: 03 is “00”
Note 1:
Connect a 75
Ω
resistor between Pin qh and Pin 6 (GND) of
CN933.
75
75
Ω
resistor (Parts code: 1-247-804-11)
Note 2:
The “AGC Center Level Adjustment” must have already been
completed before starting this adjustment.
completed before starting this adjustment.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
18
25
Set the data, and press PAUSE button.
3
C
19
25
Set the data, and press PAUSE button.
4
C
1B
25
Set the data, and press PAUSE button.
5
C
1C
25
Set the data, and press PAUSE button.
6
C
21
CA
Set the data, and press PAUSE button.
7
C
2C
03
Set the data, and press PAUSE button.
8
Playback the recorded signal at
“Preparations before adjustments”
“Preparations before adjustments”
9
2
2E
01
10
3
33
08
Set the data.
11
Confirm that the playback RF
signal is stable. (Fig. 5-3-6.)
signal is stable. (Fig. 5-3-6.)
12
3
01
07
Set the data, and press PAUSE button.
13
3
02
Check that the data changes from
“07” to “00” in about 20 seconds
after pressing PAUSE button.
“07” to “00” in about 20 seconds
after pressing PAUSE button.
14
3
03
Check that the data is “00”.
(Note3)
(Note3)
15
Perform “Processing after
Completing Adjustments”.
Completing Adjustments”.
Note 3:
If the data is other than “00”, adjustment has errors.
4-4. Processing after Completing Adjustments
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
2
2E
00
Set the data.
3
3
33
00
Set the data.
4
8
2A
00
Set the data, and press PAUSE
button.
button.
5
0
01
00
Set the data.
Fig. 5-3-6.
13.3 msec
PB RF signal is stable
Pin
qd
Pin
qh
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