Tektronix 2465B Service Manual

Performance Check—2465B/2467B Service
HORIZONTAL (cont)
4. Check Delay Jitter.
a. Set:
TRACKING
A SEC/DIV
B SEC/DIV
BTRIG
Off
1 ms
500 ns (knob out)
RUN AFT DLY
b. Select 1 ms time markers from the Time-Mark
Generator.
c. Align the intensified zones with the 10th time marker
using the A REF OR DLY POS and A controls. Superim-
pose the zones to obtain a At readout display of 0.000 ms.
d. Push in the SEC/DIV knob and adjust TRACE SEP
to separate the traces.
e. CHECK—On the 2467B for 2 divisions or less of hor-
izontal jitter on the rising edge of both time markers, and
on the 2465B for 0.8 divisions or less of horizontal jitter on
the rising edge of both time markers.
e. Adjust the SEC/DIV VAR control fully CCW.
f. CHECK—Sweep speed readout displays 30.0 ms.
g. Set the Time-Mark Generator variable timing control
for exactly 3 time markers per division.
h. CHECK—The Time-Mark Generator variable timing
% of error has changed 2% or less from the reading noted
in part b.
NOTE
On CTT instruments, rotate the A REF OR DLY
POS control for the specified delay. As the control is
rotated, the readout delay value will be followed by
the word "SET", denoting the indirect measurement
mode. A few seconds after control movement has
stopped, the word "SET" will disappear and the
readout will display a direct measurement from
the CTT.
5. Check SEC/DIV VAR Range and Accuracy.
a. Set:
A SEC/DIV
SEC/DIV VAR
At
HOLDOFF
10 ms (knob in)
In detent
Off (press and release
to eliminate At
readout)
B ends A
b. Select 10 ms time markers from the Time-Mark Gen-
erator and adjust the Time-Mark Generator variable timing
control for exactly 1 time marker per division. Note the
variable timing % error on the Time-Mark Generator.
i. Set:
A SEC/DIV
B SEC/DIV
SEC/DIV VAR
At
B TRIGGER MODE
A REF OR DLY POS
50 ms
10 ms (knob in)
CW (in detent)
Off (DLY readout)
RUN AFT DLY
Zero delay
j. Repeat parts b through h for the B Sweep.
k. Rotate the SEC/DIV VAR control CW to the detent
position and disconnect the test setup.
c. Adjust the SEC/DIV VAR control for a sweep-speed
readout (on bottom line of readout) of 20 ms and adjust
the Time-Mark Generator variable timing control for
exactly 2 time markers per division.
6. Check X-Axis Gain.
a. Set:
d. CHECK—The Time-Mark Generator variable timing
% of error has changed 2% or less from the reading noted
in part b.
NOTE
Select channels to set VOLTS/DIV.
4-34

Tektronix 2465B Specifications

General

Brand	Tektronix
Model	2465B
Category	Test Equipment
Language	English