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3. Preliminary
Display
Adjustments (SN
Reference
Note
Note
Description
Caution
Equipment
3. Preliminary Display Adjustments (SN 3001A and Below)
A1 A4 X-Deflection Amplifier
Adjustment 2, "High-Voltage Adjustment," should be performed before
performing the following adjustment procedure.
Perform this adjustment only if components have been replaced on
the AlA Z-Axis Amplifier, AlA X-Deflection Amplifier, or AlA Y
Deflection Amplifier Assemblies. Components AlA2R22 HF GAIN,
GAIN, AlA5Cl0, and AlA5Cll are factory adjusted and normally do
not require readjustment.
The Al Display Section is adjusted to compensate
circuits for proper horizontal and vertical characteristics. These
preliminary adjustments are necessary only when a major repair has
been performed in the display section (for example, replacement or
repair of the AlA Z Axis Amplifier, AlA X-Deflection Amplifier, or
CRT replacement, or minor repairs, only adjustment procedure 4,
"Final Display Adjustments," needs to be performed.
Be sure not to allow a high intensity spot to remain on the spectrum
analyzer CRT. A fixed spot of high intensity may permanently damage
the CRT's phosphor coating. Monitor the CRT closely during the
following adjustment procedures. If a spot occurs, move it off-screen
by adjusting either the front-panel INTENSITY control, or the
horizontal or vertical deflection position controls.
Digitizing Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 54501A
Pulse/Function Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8116A
Display Adjustment PC Board (setice accessory] . . . . . . .85662-60088
Termination, BNC 500 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 11593A
Adapters:
Adapter, BNC tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1250-0781
Adapter, BNC(f)
to
the
CRT drive
Adjustments 3-45
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