Chapter 2 65
Adjustment Procedures
2. Display Adjustment (8560E only)
11.Adjust A2R262 STOP BLANK and A2R263 START BLANK for the
sharpest corners of the outer box in the test pattern. The intensity of
the corners should be the same as the middle of the lines between
the corners.
12.Adjust the rear panel TRACE ALIGN until the leftmost line of the
test pattern is parallel with the CRT bezel. See Figure 2-3 on page
66.
13.Adjust the rear panel X POSN and A17R55 X GAIN until the
leftmost "@" characters and the softkey labels appear just inside the
left and right edges of the CRT bezel.
14.Adjust the rear panel Y POSN and A17R75 Y GAIN until the softkey
labels align with their appropriate softkeys.
15.Press
PRESET. If necessary, readjust STOP BLANK and START
BLANK for the best-looking intersection of the graticule lines. This
will be most noticeable along the center vertical and horizontal
graticule lines.
Intensity Adjustments
16.Press AMPLITUDE then set the REF LVL to −70 dB and the LOG dB/DIV
to 1. This should almost completely fill the screen with the noise
floor. Press
SGL SWP. Adjust A17R4 Z GAIN until the intensity at
the center of the screen is 15 NITs, as indicated by the TEK J16-TV
Photometer/Radiometer.
17.Press
CAL, MORE 1 of 2, and CRT ADJ PATTERN. Locate the dot just
under the HP logo. Adjust A17R93 ASTIG for the smallest round dot
possible.
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