
4. Final Display Adjustments (SN 3004A and Above)
R120
R220
R512 R513
R319
R426 R437
Figure 3-32. Location of Final Display Adjustments on
AlA
‘Ihble
3-6. Initial Adjustment Positions
Adjustment Position
AlA
R120 Y GAIN
centered
AlA
R127 Y POSN
centered
AlA
R220 X GAIN
centered
AlA
R227 X POSN
centered
AlA
R319 INT GAIN
two-thirds clockwise
AlA
R409 FOCUS COMP centered
AlA
R426 T/B FOC
centered
Al A2 R427
T/B
CTR
centered
AlA
R437
R/L
FOC
centered
Al A2 R440 R/L CTR
centered
AlA
R512 ORTHO
centered
AlA
R513 3D
centered
AlA
R516 INT LIM
fully counterclockwise
AlA
R517 ASTIG
centered
Front-panel INTENSITY
fully counterclockwise
Front-panel FOCUS
centered
Front-panel ALIGN
centered
4. Set the spectrum analyzer’s LINE switch to ON, and wait at least
5 minutes to allow the CRT and high-voltage circuits to warm up.
5. Set the front panel INTENSITY control fully counterclockwise and
adjust AlA2R516 INT LIM until the display is just visable. See
Figure 3-32.
6. Set the front-panel INTENSITY control fully clockwise.
7. Adjust AlA2R220 X GAIN, AlA2R227 X POSN, AlA2R120 Y
GAIN, and AlA2R127 Y POSN for optimum centering of the
display annotation and graticule pattern.
8. For an initial coarse focus, adjust the following potentiometers in
the sequence listed:
AlA3R14
FOCUS LIMIT
3-66 Adjustments
Commentaires sur ces manuels