Sony Tektronix WFM 1125, Service Manual

Page: 99 / 172

WFM 1125 Option 0A/0B/0C/0D Service Manual
5-1
Adjustment Procedures
This section contains information needed to adjust the WFM 1125 Digital
Television Waveform Monitor Option 0A/0B/0C/0D.
Adjustment in the waveform monitor are limited to the visual characteristics
(linearity, size, focus, contrast and brightness ) of the display, analog output level,
and the power supply voltage.
Requirements for Performance
Before you do this procedure, you need to address the following requirements.
This procedure is only to be performed by trained service technicians.
This waveform monitor requires a 20 minute warm-up time in a +20
_
C to
+30
_
C environment before it is adjusted.
When adjusting the display, output level, and the power supply voltage, you need
to remove the cabinet.
Equipment Required
Table 5–1 lists the equipment required to adjust the output level and power
supply voltage. No equipment is required for the display adjustment.
Table 5-1: Required equipment
Item Qty. Required precision Recommended equipment Purpose
HDTV signal generator 1 Latest modification must be
installed.
Tektronix TSG1001 and
PSC1125 (Upgraded by
040Ć1649Ć00 upgrade kit)
Signal source
Oscilloscope 1 Tektronix TDS540A with P6139A
probe or equivalent
To observe and measure many
output signals.
RSĆ232C cable with 25Ćpin,
DĆtype connectors
2 Male Tektronix part no. 174-3882-00
(provided with the PSC1125)
Signal interconnectionsbetween
the TSG1001 and PSC1125.
75 W terminator
2 Tektronix part no. 011Ć0102Ć00 Signal interconnection
BNC T connector 2 Tektronix part no. 103Ć0030Ć00 Signal interconnection
Personnel
WarmĆUp Period
Access