Adjustment Procedure—2465B/2467B Service
q.
CHECK—Procedure automatically steps through
steps 132-141 (DC balance).
r. CHECK—Readout indicates CONNECT SIGNAL TO
CH 1, 50mV, and BWL
s. Move the signal to the CH 1 OR X input connector
and set the Calibration Generator for a 50 mV standard-
amplitude signal, then press and release the upper
TRIGGER COUPLING switch. Wait approximately
10 seconds for automatic calibration of the AV cursors.
t. CHECK—Readout indicates VERT CENTER GAIN.
u.
ADJUST—Gain (R638) for precisely 5 divisions
between the two horizontal cursors.
v. ADJUST—Vertical Centering (R639) to center the
cursors on the graticule (align the cursors with the dotted
0% and 100% graticule lines).
w. Press and release the upper TRIGGER COUPLING
switch.
The microprocessor continues calibrating the
verti-
cal.
Remove signal from CH 1 input.
CAL 03—TRIGGERING
3. Check/Adjust Triggering.
NOTE
If the previous steps (CAL 01 and CAL 02) were not
performed, the adjustments in this subsection should
only be performed if those constants that would
have been set in CAL 01 and CAL 02 are known to
be correct and if a DC Balance has been performed
after a 20-minute warmup period.
a. Scroll to CAL 03.
b. Press and release the upper TRIGGER COUPLING
switch.
c. CHECK—Procedure automatically steps from 200
through 214 and stops at 215.
d.
CHECK—Readout indicates CH 1, 500 mV, and
(step) 215.
5-18
NOTE
The readout prompts the operator by showing which
connector the input signal should be applied to
(upper left corner), the amplitude of that signal
(upper center), and the autocal step number (upper
right corner). An example (from step d above) is:
CH1 500 mV 215
e. Connect a 0.5 V standard-amplitude signal from the
Calibration Generator to the CH 1 OR X input connector
via a 50 fi BNC cable.
f. Press and release the upper TRIGGER COUPLING
switch.
g.
CHECK—Readout indicates CH 1, 500 mV, and
(step) 216.
h. Press and release the upper TRIGGER COUPLING
switch.
i. CHECK—Readout indicates CH 2, 500 mV, and
(step) 217.
j.
Move the signal to the CH 2 input connector. Press
and release the upper TRIGGER COUPLING switch.
k. CHECK—Readout indicates CH 3, 500 mV, and
(step) 218.
I. Move the signal to the CH 3 input connector. Press
and release the upper TRIGGER COUPLING switch.
m. CHECK—Readout indicates CH 3, 2V, and
(step) 219.
n. Change the generator output level to 2 V, then press
and release the upper TRIGGER COUPLING switch.
o. CHECK—Readout indicates CH 4, 500 mV, and
(step) 220.
p. Move the signal to the CH 4 input connector and
change the generator output level to 0.5 V. Press and
release the upper TRIGGER COUPLING switch.
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