TB 9-6625-154-40
(6) Press TI OUTPUT ON key and adjust storage oscilloscope for a centered
display.
(7) Press storage oscilloscope Clear Display.
(8) Wait for the storage oscilloscope to complete the 256 averages then measure the
Rise time and record in table 27.
(9) Repeat technique of (6) through (8) seven more times recording measurements in
(10) Calculate the average of the eight rise time measurements and record in last
row of table for later use.
Calibrated edge rise time = [ Averages
7.5 ]
(11) Calculate the calibrated edge rise time using the formula below:
Table 27. Rise/Fall Time for Averaging.
Recorded Value
Measurement
Rise Time
Fall Time
1
2
3
4
5
6
7
8
Averages →
Calibrated edge rise/fall time
(12) Press TI Softkey,
and repeat technique of (6) through (11) above for fall time.
(13) Set TI as listed in (a) through (h) below:
(a)
MODE.
(b)
Softkey, CALIB.
Enter Password (exp. 2→3→5→7 ).
(c)
(d)
Softkey, HEAD CAL.
(e)
Softkey, Edge.
(f)
Softkey, 25 ps Edge.
(g)
Softkey, Target 1.
(h)
OUTPUT, ON.
(14) Press
(if necessary) to select Edge Speed and use the keypad to enter the
calibrated edge rise time from last row in table 27 and press Softkey, ACCEPT CAL.
(15) Press Softkey, Target 2.
(16) Press
(if necessary) to select Edge Speed and use the keypad to enter the
calibrated edge fall time from last row in table 27 and press Softkey, ACCEPT CAL.
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