5-84
H
t
CH1
CH1
CH2
CH2
magnified
40. H Phase Adjustment (VD-28 Board)
Mode
PB (EXT SYNC ON) (Note)
Signal
Arbitray tape
Color bar (VIDEO input)
Measurement Point
CH1: Color bar (The same signal
that VIDEO input)
CH2: COMPONENT OUTPUT Y
terminal (75
Ω
terminated)
Measuring Instrument
Oscilloscope
Adjustment Page
E
Adjustment Address
2A (Coarse), C9 (Fine)
Specified Value
t = 0 ± 20 nsec
Note:
“EXT SYNC” of “VIDEO SET” on the menu setting is
ON.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Change the data on page: E, address: C9 and adjust so that the
difference in SYNC falling time (t) between CH1 and CH2
satisfies the specified value, and then press the PAUSE button.
At this time, check that the data at address: C9 is “40” to “C0”.
3) If the data at address: C9 is other than “40” to “C0”, change
the lower 1 digit (lower 4 bits) of the data on page: E, address:
2A, and press the PAUSE button, then repeat from step 3).
(Initial value of data on page: E, address: 2A is 08)
4) Select page: 0, address: 01, and set data: 00.
Fig. 5-3-45
41. E-E SC Phase Adjustment (VD-28 Board)
Mode
E-E
Signal
Color bar (VIDEO input) (Note)
Measurement Point
VIDEO OUT 2 terminal (75
Ω
terminated)
Measuring Instrument
Vectorscope (SCH measurement
mode)
Adjustment Page
E
Adjustment Address
CE
Specified Value
Ø = 0 ± 5°
Note:
Set “VIDEO” mode with INPUT SELECT switch
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Adjust the phase synchronization control on the vectorscope
so that the burst luminance point is close to the U-axis.
3) Select page: E, address: CE, change tha data and adjust the
phase difference (Ø) between the burst and H phase to the
specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 0, address: 01, and set data: 00.
H phase
Burst phase
ø
Fig. 5-3-46
