Tektronix 2467B

Performance Check—2465B/2467B Service
NOTE
Correct time marks to superimpose on the reference
marker can be easily found by noting the Delta Time
Readout.
g. Set:
i. Position the leading edge of the 2nd time marker near
graticule center using the Horizontal POSITION control.
Set the Time-Mark Generator to 5 ns and adjust the Verti-
cal VOLTS/DIV and Trigger LEVEL as required.
j. Press and release the At button to obtain a At
display. Push in the SEC/DIV knob for B sweep only.
Adjust the A control for a readout display of At —20.00 ns.
If the time markers are not superimposed, adjust the A
control to do so.
A SEC/DIV
B SEC/DIV
X10 MAG
At
20 ns
5 ns (knob out)
ON
Off (DLY readout)
h. Set the Time-Mark Generator for 20 ns time markers
and adjust the A REF OR DLY POS control for a readout
display of DLY 21.25 ns.
k. CHECK—At readout is within the limits listed in
Table 4-9 for the first 5 ns time marker; then check that
the 9th and 37th time markers are within the given limits
as the A control is rotated CW to superimpose each time
marker on the reference time marker.
Set:
Table 4-9
Delta Time Display Accuracy
A SEC/DIV
B SEC/DIV
X10MAG
At
50 ns
5 ns (knob out)
ON
Off (DLY readout)
Time-
Marker
Period
and A
SEC/DIV
Switch
Setting
10 ns
20 ns
50 ns
BSEC/
DIV
Switch
Setting
500 ps
a
500 ps
a
500 ps
a
Marker
Super-
imposed
using the
A (Delta)
Control
1st
3rd
5th
7th
9th
11th
13th
15th
17th
19th
1st
9th
37th
1st
21st
91st
Delta Time Readout
Accuracy Limits
-9.68 ns to -10.32 ns
-0.30 ns to 0.30 ns
9.68 ns to 10.32 ns
19.64 ns to 20.36 ns
29.62 ns to 30.38 ns
39.58 ns to 40.42 ns
49.56 ns to 50.44 ns
59.52 ns to 60.48 ns
69.50 ns to 70.50 ns
79.46 ns to 80.54 ns
-19.55 ns to -20.45 ns
19.55 ns to 20.45 ns
159.15 ns to 160.85 ns
-49.2 ns to -50.8 ns
49.2 ns to 50.8 ns
398.1 ns to 401.9 ns
m. Set the Time-Mark Generator for 50 ns time mark-
ers and adjust the A REF OR DLY POS control for a
readout display of DLY 53.2 ns.
n. Position the leading edge of the 2nd time marker
near graticule center using the Horizontal POSITION con-
trol. Set the Time-Mark Generator to 5 ns and adjust the
Vertical VOLTS/DIV and Trigger LEVEL as required.
o. Press and release the At button to obtain a At
display. Push in the SEC/DIV knob for B sweep only.
Adjust the A control for a readout display of At —50.00 ns.
If the time markers are not superimposed, adjust the A
control to do so.
p. CHECK—At readout is within the limits listed in
Table 4-9 for the first 5 ns time marker; then check that
the 21st and 91st time markers are within the given limits
as the A control is rotated CW to superimpose each time
marker on the reference time marker.
"5 ns with X10 MAG on.
q. Set:
TRACKING/INDEP
A SEC/DIV
B SEC/DIV
X10MAG
TRACKING
100 ns
10 ns (knob out)
On
4-25