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Model 1331A/Option H72
Z-Axis Offset: To achieve the desired -1 V Z-axis offset, only one com-
ponent is changed on the Z-Amplifier/HV board.
This change is in-
dicated in Table 1.
Deflection Blanking, Remote Erase, Remote Minimum Persistence:
A special
Program
Board
A4 is designed for this
instrument
.
Circuitry for each
of the above functions is contained on this board
and
is
shown
in
figure 1.
Figure 2 is a component locator for this board.
CAUTION
A high-intensity spot
or
continuously
repetitive trace will burn the CRT
storage mesh.
Keep INTENSITY at the
lowest
level compatible with ambient
light conditions.
Rear Panel Connector: A special 4-pin connector (J4) is
mounted
on the
rear panel assembly.
Signals for Deflection Blanking, Remote Erase,
and Remote Minimum Persistence functions are applied to this con-
nector in the following manner.
J4 Connector Pin Functions
Pin
Function
1
Erase
2
Ground
3
Minimum Persistence
4
Deflection Blanking
TEST PROCEDURE.
The operating and service manual for the standard instrument (Section V)
may be used to check performance and make necessary adjustments to this
special instrument except for X-Axis and ·Y-Axis deflection factors, and
Z-Axis intensity limit and gain adjustments.
Follow
the
procedures out-
lined
below to make X, Y, and Z-Axis adjustments.
NOTE
Before attempting to adjust the instru-
ment under test, ground deflection
blanking program connection, J4, pin 4,
and apply +2 V de to Z INPUT.
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