Table of Contents
Advertisement
25. Digital Storage
Display
Adjustments
Reference
Description
Equipment
Procedure
Preliminary Graticule
Adjustments
First, preliminary CRT graticule adjustments are performed to position
the graticule on the CRT. These preliminary adjustments assume that
repair has been performed on the associated circuitry. If no repair
has been performed on the assemblies listed under REFERENCE, the
preliminary adjustments are not necessary.
Next, the Sample and Hold Balance adjustments are performed. The
horizontal and vertical Offset and Gain adjustments are performed,
then the final CRT graticule adjustments are performed.
Last, the CRT annotation adjustments are performed to place the CRT
annotation in proper location with respect to the CRT graticule.
DIGITAL VOLTMETER
Figure 3-89. Digital Storage Display Adjustments Setup
Digital Voltmeter (DVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A
Digitizing Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 54501A
1. Place instrument upright as shown in Figure 3-89 with top and A3
Digital Storage cover removed.
2. Set LINE switch to ON and press
3. Press TRACE A Cm].
4. Adjust A3A3R4 X GAIN and A3A3R5 Y GAIN to place graticule
information completely on CRT. See Figure 3-90 for location of
adjustment.
25. Digital Storage Display Adjustments
]
PRESET
Adjustments 3-145
Advertisement
Table of Contents
