Sony XDCAM PDW-HD1500, Руководство по обслуживанию

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8-3
PDW-HD1500/V1 (E)
8-3. SD Free-Running Frequency
Adjustment
Tools/Fixtures
.
Oscilloscope: TEKTRONIX TDS460A or
equivalent
.
Frequency counter: ADVANTEST TR5821 or
equivalent
Preparations
1. Turn off the power of the unit.
2. Remove the bottom panel. (Refer to Section 6-12-8.)
3. Connect an oscilloscope and a frequency counter to the
unit.
4. Turn on the power of the unit and the tools
n
Apply power to the unit and the tools to allow warm-
up of 10 minutes or longer.
SD Free-Running Frequency Adjustment
1. Set an oscilloscope as follows:
CH-2: DC 2 V/DIV
TIME: 100
u
s/DIV
2. Display the adjustment item referring to Section 8-1-3.
3. Select “A23: CP VR” rotating the
[PUSH|SET]
knob, and press the
[SELECT]
button.
4. Select “SD 27MHz VCO” rotating the
[PUSH|SET]
knob, and press the
[SELECT]
button.
MAINTENANCE MENU
M1:ADJUST
A2:AUDIO/VIDEO/BATTERY
A23:CP VR
HD 74MHz VCO
SD 27MHz VCO
SDI ENC1 VCO
SDI ENC2 VCO
PDW-HD1500
Connection diagram
Oscilloscope
CH-2
IN
CH-2
OUT
Frequency counter
INPUT
TP3104
(HPR-23 board)
The SD 27 MHz VCO ADJUST menu appears.
5. Perform the adjustment by rotating the
[PUSH|SET]
knob so that a frequency counter reading satisfies the
specification.
Measurement Point: TP3104/HPR-23 board (C-6)
Specification:
27.00000
±
0.00005 MHz
6. Press the MENU button to return to the
[MENU]
screen.
7. Press the
[RETURN]
button.
8. Select “A2F: NV-RAM CONTROL” rotating the
[PUSH|SET]
knob, and press the
[SELECT]
button.
9. Select “SAVE ALL ADJUST DATA” rotating the
[PUSH|SET]
knob, and press the
[SET]
button to
save the adjustment data.
MAINTENANCE MENU
SD 27MHz VCO ADJUST
preset : 80H
7A(HEX)
INC/DEC : CTRL.KNOB
TO MENU : MENU KEY