Performance Check—2465B/2467B Service
12.
Set the TRIGGER LEVEL for a stable display.
20.
Push the SEC/DIV knob in.
13.
Pull the SEC/DIV knob out.
21.
Change the VOLTS/DIV to the next position
listed in Table 4-2.
14 Set:
B TRIGGER MODE
SOURCE
COUPLING
SLOPE
TRIG AFT DLY
VERT
DC
+
22.
Set the Calibration Generator to the correspond-
ing signal amplitude setting.
23.
Press and release the AV pushbutton to obtain
the AV readout display.
NOTE
On CTT instruments, rotate the A REF OR DLY
POS control for the specified
delay.
As the con-
trol is rotated, the readout delay value will be
fol-
lowed by the word
"SET".
This value shows the
approximate
delay.
A few seconds after control
movement has stopped, the word "SET" will
disappear and the readout delay value as meas-
ured by the CTT will
appear.
This is normal
operation and not cause for concern.
15.
Adjust A REF OR DLY POS control for a delay
reading of 0.000 ms.
16.
Set the TRIGGER LEVEL control to the most
positive voltage that produces an intensified
point on the waveform display for each position
(+ and -) of SLOPE.
24.
Repeat subparts 4 through 23 of part e for each
VOLTS/DIV setting listed in Table 4-2.
25.
Set the TRIGGER COUPLING to NOISE REJ.
26.
Set the CH 1 VOLTS/DIV to 50 mV.
27.
Set the Calibration Generator STD AMPLITUDE
output level to 0.2 V.
28.
CHECK—Trigger Level Readout is within the
lim-
its given in Table 4-2 for NOISE REJ Coupling.
f. Return the TRIGGER COUPLING to DC.
17.
CHECK—The B Trigger Level readings are
within the limits given in the +Peak column of
Table 4-2.
g.
Set the CH 1 VOLTS/DIV and the Calibration
Gen-
erator output level to produce a vertical signal display 5
divisions in amplitude.
18.
Set the TRIGGER LEVEL control to the most
negative voltage that produces an intensified
point on the waveform display for each position
(+ and -) of SLOPE.
19.
CHECK—The B Trigger Level readings are
within the limits given in the —Peak column of
Table 4-2.
NOTE
On CTT
instruments,
repeat
sections
16-19
for TRIG A DLY trigger mode using the
-hPeak and -Peak
columns
of
Table
4-2.
h. CHECK—Display amplitude reduces to 2 divisions or
less when the VOLTS/DIV VAR control (of the channel
under test) is rotated fully CCW. Return the VOLTS/DIV
VAR control to its maximum CW (detent) position.
i. Set the Calibration Generator output level and VERTI-
CAL POSITION controls for a 2-division display vertically
centered on the graticule. Use the CH 1 VAR control if
necessary to obtain the correct display amplitude.
j.
Set the VERTICAL POSITION control to align the top
edge of the display with the top graticule line.
4-8
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