Delay Time Accuracy - Tektronix 2245A Operator's Manual

8. Delay Time A cc u ra c y
a. Set:
Horizontal MODE
B SEC/DIV
TRACE SEP
CH 1 POSITION
b. Position the intensified dot to full left position (counter-clockwise rota­
tion of the |<-
c. Align the leading edge of the time marker displayed on the B trace to
the left-m ost (first) graticule line, using only the Horizontal POSITION
control.
d. CHECK—that the readout is ?0.000 ms.
e. Position the intensified zone to the second time marker and align the
leading edge of the time marker displayed on the B Trace to the left­
most (first) graticule line using only the K- OR DELAY control. Using
the Readout Accuracy Limits given in Table 7-4, check the delay time
accuracy.
f. Repeat the procedure for the 3rd through 10th time markers.
Time M arker
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
10th
2245A Operators
DELAY control).
o r
Table 7-4
Delay Time A cc u ra cy
Readout A cc u ra c y Lim its
? 0.000 ms
0.945 ms to 1.055 ms
1.940 ms to 2.060 ms
2.935 ms to 3.065 ms
3.930 ms to 4.070 ms
4.925 ms to 5.075 ms
5.920 ms to 6.080 ms
6.915 ms to 7.085 ms
7.910 ms to 8.090 ms
8.905 ms to 9.095 ms
Performance Check Procedure
ALT
10 jjis
Fully CCW (maximum
downward position)
To display both the ALT
and the B Delayed Traces
7-43