Panasonic AJ-YA120AG, Service Manual

Page: 454 / 647

ELE-21
Adjustment System
7-5. NTSC Burst Sampling
Phase
Adj.
BOARD SGEN SDI / UDC
TP
SD REF IN Through OUT, TP301
ADJ.
VR302 [NTSC_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: 59/60
OUTREF: SDREF
HD FREQUENCY: 59/23
SYS FORMAT 1080i
1. Adjust VR302 so that the position of sampling
pulse (TP301) is positioned at the center of the
burst signal on the SD REF signal.
7-6. NTSC CF Phase (1) Adj.
BOARD SGEN SDI / UDC
TP
TP200, SD REF IN Through OUT
ADJ.
VR300 [NTSC_CF]
TAPE ---
INPUT
SD REF IN = Black Burst (W/CF Flag)
INT SG
MODE EE
M. EQ
Oscilloscope
SPEC.
CF flag of SD REF input is coincided with
leading edge of TP200
<VTR Menu Setting>
SYSTEM FREQUENCY: 59/60
OUTREF: SDREF
HD FREQUENCY: 59/23
SYS FORMAT 1080i
1. Supply the same signal to the SD REF IN (thru
out) to the oscilloscope.
2. Set VR300 at fully CCW position.
3. Slowly rotate VR300 CW and stop it when the CF
flag on the SD REF meet the rising edge of
TP200.
Not: ALL cables should be 75 ohm and 1.5m.
AJ-HD1200A
+
AJ-YA120AG
75 ohm ON
Thru
OSCILLO
SCOPE
HD SDI IN
HD SDI SG
OR
AJ-HD1500
AJ-HD1600
AJ-HD1700
A B
A=B
± 250nsec
SD
REF IN
TP301
TP200
SDREF