Panasonic AJHD1200AP - DVCPRO HD VTR, Service Manual, Page: 455 / 647

ELE-22
7-7. NTSC CF Phase (2) Adj.
BOARD SGEN SDI / UDC
TP
TP1, TP2, TP200, HD REF IN Through
ADJ.
VR300 [NTSC_CF]
TAPE ---
INPUT
SD REF IN = Black Burst (W/CF Flag)
INT SG
MODE EE
M. EQ
Oscilloscope
SPEC.
Rising Edge of TP2=Center of pulse of TP1
(Center ± 5nsec)
<VTR Menu Setting>
SYSTEM FREQUENCY: 59/60
OUTREF: SDREF
HD FREQUENCY: 59/23
SYS FORMAT 1080i
1. Adjust VR300 so that the rising edge of TP2 is at
the center of TP1.
2. After completion of step 1, confirm “7-6. NTSC
CF Phase Adjustment (1)”.
<Note>
The oscilloscope should be observed in the CHOP
mode.
Do not rotate VR300 too much, which may invert the
phase of the CF pulse. If this is the case, repeat “7-6.
NTSC CF Phase (1) Adj. and 7-7. NTSC CF Phase
(2) Adj.”.
7-8. PAL Bust Sampling Phase Adj.
BOARD SGEN SDI / UDC
TP
TP301
ADJ.
VR303 [PAL_S/H]
TAPE ---
INPUT
SD REF IN = Black Burst (W/CF Flag)
INT SG
MODE EE
M. EQ
Oscilloscope
SPEC.
Pulse at TP301=Center of Burst ± 250nsec
(A = B ± 250nsec)
<VTR Menu Setting>
SYSTEM FREQUENCY: 50
OUTREF: SDREF
1. Adjust VR303 so that the position of sampling
pulse (TP301) is at the center of the burst signal
on the SD REF signal.
A B
SD REF
IN THRU
TP301
TP2 (5Vpp)
TP1 (5Vpp)
TP2 (5Vpp)
TP1 (5Vpp)
Trigger