Sony XDCAM PDW-HD1500, Руководство по обслуживанию

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8-12
PDW-HD1500/V1 (E)
8-6. Audio System Adjustment
8-6-1. Adjustment Overview
Tools/Fixtures
Audio analyzer *
1
Audio Precision System One or System Two
Tektronix AA501A-option 02
Audio signal generator
Tektronix SG5010
Agilent Technologies HP339A
Or equivalent product
Audio level meter
Agilent Technologies HP3400A
Meguro Electronics MN-446
Or equivalent product
*
1: The audio analyzer should be filtered through 80 kHz LPF throughout
adjustment.
Preparation
1. 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.
2. Set the VARIABLE switch to PRESET.
3. Select the maintenance menu M370 and set the
HEADROOM to
_
20 dB.
4. Select the maintenance menu M373 and set the input
level of all channels to
+
4 dB.
5. Select the maintenance menu M377 and set the output
level to
+
4 dB.
After completing the audio system adjustment, be sure
to reset the above settings to the customer settings.
8-6-2. Analog Audio Output System
Adjustment
1. Select the setup menu 808 and set the INTERNAL
AUDIO SIGNAL GENERATOR to 1 kHz sine.
2. P2: AUDIO of the function menu
→
Press the A1
INPUT SEL button for a few seconds to start the SG
(internal test signal generator).
3. Select CH-1 for the AUDIO MONITOR L-channel.
Select CH-2 for the AUDIO MONITOR R-channel.
Channel-1 Adjustment
4. Connect an audio level meter or audio analyzer input
to the ANALOG AUDIO OUTPUT CH-1 connector.
5. Launch the maintenance menu.
6. Select M1: ADJUST.
7. Select A27: APR VR.
8. Select A272: OUTPU UNITY.
9. Select OUTPUT LEVEL CH1.
10. Check that the audio output level conforms to the
specification shown below on the audio level meter or
audio analyzer. If not, adjust the setting value using
the
[PUSH|SET]
knob on the OUT CH1 UNITY
ADJUST screen.
Specification:
+
4.0
±
0.1 dBu (across 600
Z
load).
11. When the channel-1 adjustment is complete by step
10, press RETURN to return to the A272: OUTPUT
UNITY screen.
Channel-2 Adjustment
12. Connect an audio level meter or audio analyzer input
to the ANALOG AUDIO OUTPUT CH-2 connector.
13. Select A272: OUTPUT UNITY and select OUTPUT
LEVEL CH2.
14. Check that the audio output level conforms to the
specification shown below on the audio level meter or
audio analyzer. If not, adjust the setting value using
the
[PUSH|SET]
knob on the OUT CH2 UNITY
ADJUST screen.
Specification:
+
4.0
±
0.1 dBu (across 600
Z
load).
15. When the channel-2 adjustment is complete by step
14, press RETURN to return to the A272: OUTPUT
UNITY screen.