Tektronix 2467B

Performance Check--2465B/2467B Service
r. Select 0.1 MS time markers from the Time-Mark
Generator.
s. Adjust the A and A REF OR DLY POS controls for a
At reado Jt display of 800.0 ns.
t. Adjust the Horizontal POSITION control to align the
leading edge of the 2nd time marker on the A sweep with
the 2nd vertical graticule line.
u. Rotate the TRACE SEP control CCW to separate
the traces.
v. Adjust the A REF OR DLY POS control to intensify
the 2nd and 10th time markers (of the A sweep) and
display the leading edges of the displayed B sweep time
markers in the center area of the graticule.
w. VERIFY—The horizontal distance between the lead-
ing edges of the B sweep time markers is within the con-
servative guideline listed in Table 4-10. If this guideline is
met, accuracy between each marker is ensured, and the
following CHECK step need not be performed.
x. CHECK—The horizontal distance between the lead-
ing edges of the B sweep time markers is within the
specified limits given in Table 4-10. The limit given is for
separation between the 2nd and 10th marker; however,
separation between the 2nd marker and each succeeding
marker should also be checked, calculating the limits from
the specification as listed at the top of the table.
NOTE
To easily maintain the A SWP and B SWP difference
while testing Delta Time, use the following method:
1. Starting with the 0.5 us test in Table 4-9 (X10
MAG off), turn TRACKING off.
2. Press and hold the TRACKING button, then
push the SEC/DIV knob in. This will lock the
sweeps together at that difference.
3. Pull the SEC/DIV knob out.
The fastest sweep speed at which the X100 difference
is maintained is with an A SEC/DIV of 500 ns and a B
SEC/DIV of 5 ns, after which only the A sweep speed
Table 4-10
Delayed Sweep Delta Time Accuracy
A SEC/DIV
and Time
Markers
0.1 MS
0.2 MS
0.5 MS
1 MS
2 MS
5 MS
10 MS
20 MS
50 MS
0.1 ms
0.2 ms
0.5 ms
1 ms
2 ms
5 ms
10 ms
20 ms
50 ms
0.1 s
0.2 s
0.5 s
B SEC/DIV
as Displayed
on Readout
1 ns
a
2 ns
a
5 ns
a
10 ns
b
20 ns
50 ns
100 ns
200 ns
500 ns
1 MS
2 MS
5 MS
10 MS
20 MS
50 MS
100 MS
200 MS
500 MS
1 ms
2 ms
5 ms
Displayed Separation of
Delayed Time Markers
(for 2nd and 10th markers)
Conservative
Guideline
(divisions)
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
2.4
6.4
6.4
Specified
Limit:
(0.3% time)
interval
+0.1% of
full scale-
divisions
+ 200 ps
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
3.4
7.4
7.4
»X10 MAG On.
b
For remainder of Table, turn X10 MAG off.
will change with the SEC/DIV knob. Push TRACKING
to unlock this setup.
y. Repeat part w (and x if necessary) for each combina-
tion of A SEC/DIV, B SEC/DIV, and X10 MAG settings
listed in Table 4-9. The At readout should be set to indi-
cate eight times the A SEC/DIV setting. At the slowest
sweep speeds, the B SEC/DIV knob can be pushed in (in
B Sweep only) to increase the display repetition rate.
4-26