2. Display Adjustment
Intensity
Adjustments
16.
Press
(AMPLITUDE)
then set the
REF
LVL
to -70 dB and the LOG
d&‘DIV
to 1. This
should almost completely fill the screen with the noise floor. Press
(SGL).
Adjust
A17R4 2 GAIN until the intensity at the center of the screen is about medium. It
should be fully illuminated, but not so bright that it burns the screen (15
NITS
on a
photometer/radiometer).
17. Press (CAL), MORE
I
of 2 , and CRT
ADJ
PATTERN. Locate the dot just below the
HP logo. Adjust A17R93 ASTIG for the smallest round dot possible.
18. Adjust A17R34 COARSE FOCUS and A17R92 DDD for the best focus of the characters
at the center of the screen.
19. Adjust A17R21 Z FOCUS for the best focus of the test pattern outside box.
20. Adjust A17R26 X FOCUS for best focus of the
“0”
characters at the corners of the test
pattern.
21. Repeat steps 17 through 20 to obtain the best overall focus quality.
2-18 Adjustment Procedures