Check Delay Jitter - Tektronix 2235A Instruction Manual

Performance Check Procedure
-
2235A lnstructlon
d. Rotate the B DELAY TlME POSITION control fully
clockwise.
e. CHECK- lntensified portion of the trace is past the
1 1 th vertical graticule line.
f. Set:
A and B SECIDIV 0.5 1s
B DELAY TIME POSITION
Fully counter-
clockwise
g. Align the start of the A Sweep with the 1st vertical
graticule line using the Horizontal POSITION
control.
h. CHECK- lntensified portion of the trace starts within
1.1 divisions of the start of the sweep.
i. Repeat parts d and e.
j. Set:
Channel 1 Input Coupling DC
Horizontal MODE
B
A SECIDIV 0.5 1s
B SECIDIV 0.05 1s
B DELAY TIME POSITION 1 .OO
k. Select 0.5-1s time markers from the time-mark
generator.
I. Adjust the Horizontal POSITION control so that the
top of the first fully displayed time marker is aligned
with the center vertical graticule line.
m. Without changing the Horizontal POSITION control
setting, set the B DELAY TlME POSITION dial to
9.00. Slightly readjust the B DELAY TlME POSITION
dial to align the top of the time marker with the center
vertical graticule line.
n. CHECK-The B DELAY TlME POSITION dial setting
is between 8.910 and 9.090.
o. Repeat parts I through n for the remaining A and B
SECIDIV and time-mark generator setting combi-
nations shown in Table 4-5.
Table 4-5
Settlngs for Delay Time Accuracy Checks
Set:
A SECIDIV
Switch
Setting
0.5 1 s
5 1s
0.5 ms
5 ms
A SECIDIV 0.1 ms
B SECIDIV 10 1s
B DELAY TIME POSITION 1.00
Select 0.5-ms time markers from the time-mark
generator.
B SECIDIV
Switch
Setting
0.05 1s
0.5 1 s
50 1s
0.5 ms
Adjust the Horizontal POSlTlON control so that the
rising edge of the displayed time marker is aligned
with the center vertical graticule line.
Time-Mark
Generator
Settlng
0.5 1s
5 1s
0.5 ms
5 ms
Without changing the Horizontal POSITION control
setting, turn the B DELAY TIME POSITION dial clock-
wise to position the next time marker leading edge to
the center vertical graticule line.
CHECK-The B DELAY TlME POSITION dial setting
is 0.980 to 1.020 greater than the previous setting.
Set the B DELAY TlME POSITION dial to the exact
integer settil-rg.
Repeat parts r through u for each successive time
marker up to the marker corresponding to the B
DELAY TlME POSITION dial setting of 10.00.
Check Delay Jitter
Set:
A SECIDIV 0.5 ms
B SECIDIV 0.5 1 s
B DELAY TIME POSITION 10.00
Select 50-1s time markers from the time-mark
generator.
Rotate the B DELAY TIME POSITION control
counterclockwise to position a time marker within
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