TM 11-6625-3025-14/ET426-AA-MMA-010/E154 VII210/T.O. 33A1-8-902-1-1
NOTE
This instrument provides the pattern in either white polarity or black polarity, as
selected at the front panel. White polarity provides a white pattern element on a
black background, as shown in figures 6-11 and 6-14. A black element developed
on a white background is generated in the black polarity, as shown above. Signal
timing and calibration is the same in either instance.
(11) Connect the video output connector to the monitor input to display the H bar pattern. Check that H bars
are straight. Check that when the pattern control is set on BLACK, black bars on a white background
are obtained and when the pattern control is set on WHITE, white bars on a black background are
obtained.
(12) Performance verification of the H bar function is now complete.
c.
Bar.
(1) Connect the oscilloscope channel 1 input to the video output connector at the rear panel.
(2) Set the oscilloscope sweep to 2 msec per division.
(3) Connect oscilloscope external sync to the V drive source.
(4) Set the function selector switch at BARS.
(5) Compare oscilloscope display to figure 6-16.
Figure 6-16. Oscilloscope Display of the BAR signal Waveform at vertical Rate, White Polarity
6-44
