6-98
DNW-A22/A22P
5. PB Video Phase Adjustment
n
Perform this adjustment without using the extension board.
Measuring equipment: Composite waveform/vector monitor
(1) Turn off the power of DNW.
(2) Remove the TBC-24 board from the extension board.
(3) Pull out the extension board.
(4) Insert the TBC-24 board to DNW.
(5) Turn on the power.
Y phase confirmation [to step (19)]
(6) Set the composite waveform/vector monitor as follows:
WAVEFORM mode, SWEEP: 2H, MAG ON, INPUT: CH-A, INT REF
LINE SELECT: 183 to 202 for NTSC
218 to 241 for PAL
(7) Display the BURST signal part of CH-A side on the composite waveform/vector monitor.
(8) Playback the color-bar signal portion (14:00 to 17:00) of the alignment tape CR5-1B or CR5-1B PS.
(DNW-A22: CR5-1B, DNW-A22P: CR5-1B PS)
(9) Confirm that time between the 50% position at rising ede of H SYNC signal and the 50% position at
the rising edge of while signal portion.
Adjustment point:
1
RV300/TBC-24(D-1)
Specifications:
A = 5.2
±
0.1
µ
s
If the specification is not satisfied by adjustment, perform steps (10) through (13) after setting RV300
to the mechanical center.
6-7. TBC-24 Board Replacement
A
50 %
50 %
Composite waveform/vector monitor