Tektronix 2247A

3
Performance Check Procedure
Set time-mark generator for 1 ms time markers.
Position the Intensified dot to the leading edge of the 10th time marker
to display the rising edge on the B Trace (using the I- OR DELAY
control). It may be necessary to reduce the A intensity level to observe
the intensified dot.
Set:
Horizontal MODE B
B INTEN Fully cw
(maximum
intensity)
CHECK—that the jitter on the leading edge does not exceed one
division over a two-second interval. Disregard slow drift.
Delay Time Accuracy
Set:
Horizontal MODE ALT
B SEC/DIV 10 ps
TRACE SEP Fully cow
(maximum
downward
position)
CH 1 POSITION To display both
the ALT
and the B
Delayed Traces
Position the Intensifled dot to full left position (counterclockwise rota-
tion of the k- OR DELAY control).
Allgn the leading edge of the time marker displayed on the B trace to
the left-most (first) graticule line, using only the Horizontal POSITION
control.
CHECK—that the readout Is ?0.000 ms.
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 #- OR DELAY control. Using
the Readout Accuracy Limits given in Table 7~4, check the delay time
accuracy.
Repeat the procedure for the third through tenth time markers.
2247A Operators 7-43