Chapter 2 33
Making Adjustments
1a. Display (with four access holes in top of shield)
1a. Display
(with four access holes in top of shield)
This adjustment applies to:
All 8590 E-Series and L-Series spectrum analyzers
8591C cable TV analyzers
8594Q QAM analyzers
There are two different types of displays. If your display has four holes
in the top of the shield, continue with this procedure. If it has eight
holes, go to the next procedure.
The horizontal and vertical display positions are adjusted using
front-panel softkeys. These positions are then stored in nonvolatile
memory.
There are two focus adjustments, fine and coarse. The fine adjustment
is located on the left side of the display assembly and can be accessed
with the instrument cover on or off. The coarse adjustment is located on
the rear of the display assembly and can only be adjusted with the
instrument cover off.
Procedure
Display Position
1. Press the following analyzer keys to adjust the horizontal position.
PRESET
CAL, More 1 of 4
CRT HORZ POSITION
2. Rotate the knob until the display is centered horizontally.
3. Press the following analyzer softkey to adjust the vertical position.
CRT VERT POSITION
4. Rotate the knob until the display is centered vertically.
5. Press the following analyzer keys to store the horizontal and vertical
position values into nonvolatile memory.
CAL
CAL STORE
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