The portable test
instrument described
in this article supplies
RGB test signals for
VGA colour displays
as used in many of
today’s computer systems.
The tester supports
line frequencies
of 31-83 kHz, and
raster frequencies of
55-114 Hz, with selectable
sync polarity as
a useful extra. The
VGA tester not only
allows ‘suspect’ displays
(‘super bargains’)
to be tested
on the spot, it is also
great for computer
service and repair
shops.
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