BG7 module adjustment procedures
BG7moduleadj
ustment procedures
Adjustment i
n the BG7 Generator module a re for the output offset, output gain,
and chroma gain.
Requirements for adjustment
Before doing the adjustment, note the following requirements.
Personnel
This proc edure is only to be performed by trained service technicians.
Warm-up p
eriod
The BG7 module requires a 20 minute warm-up time in a +20 °C to +30 °C
environment before it is adjusted. Adjustments done before the operating
temperature has stabilized may cause errors in performance.
Access
When adjusting the blanking, luminance, and chrominance levels, you need to
remove the top cover of the TG8000 mainframe. (See page 2-25, Top cover.)
Required equipment
The following table lists the equipment required to adjust the output offset, output
gain
, and chroma gain.
Table 8-1: Equipment required for BG7 module adjustment procedures
Item No. Minimum requirement Recommended equipment
TV signal generator platform
1
Tektronix TG8000
Digital multimeter 1
5 1/2 digits
FLUKE 8842A
Oscilloscope
1
Bandwidth: 1 GHz or higher
75 Ω input
Tektronix DPO70404C with TekConnect
TCA-75 adapter
75 Ω BNC cable
1 Length: 42 inches Tektronix part number 012-0074-00
75 Ω coaxial terminator
1
75 Ω±0.1%
Tektronix part number 011-0102-03
BNC T connector
1 Tektronix part number 103-0030-00
BNC female to dual banana
adapter
1 Tektronix part number 103-0090-00
8–2 TG8000 Multiformat Test Signal Generator Service Manual
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