Tektronix 2247A Operator's Manual page 219

Performance Check Procedure
c. Set time-mark generator for 1 ms time markers.
d. Position first time marker horizontally to the first vertical graticule line
(left-most edge of the graticule).
e@. Press TIME button to display the TIME menu.
f. Press k- SEC -4 menu button to turn on time cursors.
g. Position the reference cursor to the second time marker and the delta
cursor to the tenth time marker.
h. CHECK—that the readout Is 7.940 ms to 8.060 ms.
Lb Press the TIME button to display the TIME menu.
J. Set l© 1/SEC > on.
|. CHECK—that the readout Is 124 Hz to 126 Hz.
2. ke PHASE -4 Cursor Accuracy
a. Press the TIME button to display the TIME menu.
b.
Press ¢ PHASE - menu selection to display the menu cholces.
c. Set l© SET 360° on.
d. Position the first time marker to first graticule line. Then position the
e. Set le PHASE -4 on.
f.
Position delta cursor to the leading edge of the sixth time marker.
g. CHECK—that
the readout
is between
177.9 and
182.1 degrees.
h. Disconnect time-mark generator.
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