5-26. Repeatibility; 5-29. Crosstalk; Repeatibility Test Setup - HP 1317A Operating And Service Manual

Model 1317A
SQUARE WAVE
GENERATOR
50n
OUTPUT
X
INPUT
(IN REAR)
50n COAX
Performance Check
Model 1317A
CHECK
FOR MOVEMENT
OF DOT
1317A-L-010
Figure 5-6. Repeatibility Test Setup
1. Turn delay vernier ccw. Note appearance of
distorted trace segment projecting from dot.
m. Adjust delay vernier until trace segment just
disappears.
n. Measure time difference between two tran-
sitions displayed on monitor oscilloscope. Difference
shall be less than 200 ns.
5-26. REPEATIBILITY.
5-27. Required Result. There shall be less than
0.15% of full-screen error in readdressing any point
on screen from any other point on screen.
5-28. Procedure.
a. Perform preoperational procedure (Section
III).
b. Set 500/10K switches (on boards
Al
and A3)
to SOD.
c. Connect equipment as shown in figure 5-6.
d. Set frequency of square wave generator to
10 kHz, and center symmetry control.
e. U sing position controls, place base line dot
to center of CRT.
f. Set amplitude of square wave generator to
place maximum excursion dot off screen (not more
than one screen diameter).
g. Vary frequency, amplitude and symmetry
controls of square wave generator. Base line dot shall
remain stationary while controls are being moved.
h. Disconnect square wave generator from X
INPUT and reconnect to Y INPUT.
i. Repeat steps e, f, and g.
5-29. CROSSTALK.
5-30. Required Result. Crosstalk between de-
flection amplifiers shall be less than 0.015 inch with
one input terminated in 50 ohms and the other driven
by a I-volt, 500-kHz signal.
5-31. Procedure.
a. Perform preoperational procedure (Section
III).
b. Set 500/10K switches (on boards A and A3)
to
soo.
c. Connect equipment as shown in figure 5-7.
d. Set output of constant amplitude signal gen-
erator for I-volt p-p, 500 kHz output.
5-7