JVC BR-D95U - Manual (Page 61)

120
12 EDITING SYSTEM PHASE ADJUSTMENT
Match
(WFM: Inside reference sync signal)
Player 1
Player 2
Video (H) phase (VID (H) PHASE) adjustment
The video phase determines where a picture is located with respect to the sync signal. You can adjust this using
the same waveform monitor used for system phase adjustment. Set the WFM reference sync to INT and adjust
while observing blanking until no part of the VCR picture is missing in the rising section.
If you’re not using a waveform monitor, wipe the picture with the switcher reference signal and adjust until the
entire picture can be seen on the monitor.
Adjustment of Player 1
1. Select Player 1 with the special-effects device
(switcher).
2. Play back the reference color bar on Player 1.
3. Set the WFM’s input to A and synchronize with
input A. Adjust the video phase by setting the [VID
(H) PHASE] item of Player 1 so that none of the
image is missing. (Refer to the upper figure on the
left.)
Adjustment of Player 2
4. Select Player 2 with the special-effects device
(switcher).
5. With the WFM’s input set to A and input A
synchronized, adjust the video phase by setting
the [VID (H) PHASE] item of Player 2 in the same
way as step 3. (Refer to the lower figure on the
left.)
Ⅲ Waveforms on the WFM (NTSC signal) Ⅲ Waveforms on the VSC (NTSC signal)
A: Video level
Adjust to 100 IRE. (NTSC)
Adjust to 0.7 V (PAL)
B: Setup level (NTSC only)
Adjust against deviation.
C: Chroma level/chroma phase
Adjust the two knobs so that the lighting point of
each vector waveform is located within the
mark.
R MG
B
CY G
YL
B:
Setup level
A:
Video level
Adjustment outline for each item
● Video level/setup level/chroma level/chroma phase
Use menu switch No. 124 <CHROMA ROTE> to specify whether the chroma phase reference signal is a
composite signal or component signal.
1. Play back a cassette tape with standard color signals recorded on it.
Do not use the built-in color bar signal for adjustment.
2. Adjust the knobs so that the displays on the waveform monitor (WFM) and the vectorscope (VSC)
appear as illustrated below.
NTSC signal
waveforms
12-2 ADJUSTMENT
121
12-2 ADJUSTMENT
12 EDITING SYSTEM PHASE ADJUSTMENT
Waveforms on the vector scope (NTSC signal)
Fig. 1
Phase setting for genlocking signal
1. Set the vector scope’s input to B and synchronize
with input B. Adjust the phase of the burst signal to
the reference line with the vector scope (Refer to
Fig. 2 on the left.).
Adjustment of Player 1
2. Select Player 1 with the special-effects device
(switcher).
3. Play back the reference color bar on Player 1.
4. Set the vector scope’s input to A and synchronize
with input B. Adjust the phase of a burst signal to
the reference line by setting the [SC PHASE] item
of Player 1. (Refer to Fig. 2 on the left.)
Adjustment of Player 2
5. Select Player 2 with the special-effects device
(switcher).
6. Repeat steps 3 and 4 to adjust the subcarrier of
Player 2.
Subcarrier phase (SC PHASE) adjustment
System subcarrier phase adjustment matches the VCR subcarrier with the reference subcarrier of the switcher.
Adjust so that the reference subcarrier overlaps the VCR subcarrier.
R MG
B
CY G
YL
Burst signal
R MG
B
CY G
YL
Burst signal
Fig. 2
System phase (SYSTEM PHASE) adjustment
System phase adjustment matches the VCR’s blanking phase with the switcher’s correct blanking phase. Switch
between the switcher reference signal and the input VCR signal and adjust until there is no change in phase
position. Without this adjustment, video distortion occurs after completion of fading during switching.
Match
50%
50%
50%
50%
Genlocking signal
(H sync)
Player’s video output
(H sync)
Phase setting for genlocking signal
1. Set the waveform monitor (WFM)’s input to B and
synchronize with input B. Set the H sync position
with the WFM’s H POSITION volume control to
50% of the H sync level. (Refer to the upper figure
on the left.)
Adjustment of Player 1
2. Select Player 1 with the special-effects device
(switcher).
3. Play back the reference color bar on Player 1.
4. Set the WFM’s input to A and synchronize with
input B. Set the [SYSTEM PHASE] item of Player
1 to the same H sync position as step 1. (Refer to
the lower figure on the left.)
Adjustment of Player 2
5. Select Player 2 with the special-effect device
(switcher).
6. Repeat steps 3 and 4 to adjust the system phase
of Player 2.
• The KM-D600 switcher is self-adjusting. No
adjustment is required.
(Pay attention to sync fall)
Waveforms on a waveform monitor
The WFM enlarges in 0.1 µsec.
System phase/subcarrier phase/SCH phase
The system phase can be varied with the subcarrier-unit step. The relationship between the sync and burst
phase does not change.
The phase in the subcarrier can be varied. The relationship between the sync and burst phase does not change.
● To adjust the phase with reference to sync phase, follow the system phase adjustment procedure described below.
● To adjust the phase with reference to subcarrier phase, adjust the system phase as described below, then
adjust the subcarrier phase.
● To vary sync and burst phase (SCH), adjust it with <SCH PHASE> in the video control menu.
* ● Adjustment of the KM-D600 switcher is not
necessary as it is self-adjusting.
● Adjustment of the KM-3000 switcher is not necessary
as it is a component switcher.
● Composite switchers other than the KM-D600 must
be adjusted.