Tektronix 2221A User Manual page 151

2221A User Manual
g, CHECK — Display is not triggered (no trace) at either extreme of
rotation.
0 Step 6: Check Single Sweep Operation
a. Adjust the Trigger LEVEL control to obtain a stable display.
b. Set:
CH 1 AC-GND-DC
Trigger SLOPE
SOURCE
COUPL
SEC/DIV
c. Press in the SGL SWP button. The READY LED should illuminate
and remain on.
d. Set the CH 1 AC-GND-DC switch to DC.
The INTENSITY control may require adjustment to observe the
single-sweep trace.
e. CHECK — READY LED goes out and a single sweep occurs.
f. Press in the SGL SWP button several times.
g. CHECK — Single-sweep trace occurs, and the READY LED illumi­
nates briefly every time the SGL SWP button is pressed in and
released.
h. Disconnect the test equipment from the instrument.
f l Step 7: Check Acquisition Window Trigger Points
a. Set:
CH 1 AC-GND-DC
Trigger Mode
SEC/DiV
STORE/NON-STORE
Acquisition 1K/4K
b. Use the Horizontal POSITION control to align the start of the display
acquisition with the 1st vertical graticule line.
c. Press in the Acquisition TRIG POS button until the store trigger
point (T) is located on the left side of the screen.
d. CHECK — The POST TRIG point (T) is 1.28 divisions from the start
of the display acquisition.
Appendix C: Performance Verification
GND
Positive (button
out)
CH 1
NORM
20 ms
NOTE
GND
P-P AUTO
0,1 gs
STORE
(button in)
1 k
A -47