Tektronix 2247A

Appendix A
Table A-1 (cont)
FRONT PANEL CONTROL
AUTO SETUP ACTION
TRIGGER (cont)
B LEVEL
Nominall midway between peaks of B
SOURC! nal, if ALT or B selected; if
a Gaunten! imer measurement in A horl-
zontal is selected, level(s) reacquired;
otherwise as selected by user.
CH 1 and CH 2 COUPLING
(Channel turned on)
DC, If COUPLING set to GND or DC;
otherwise AC.
VERTICAL MODE
CH 1, CH 2, and ADD
CH 1 and CH 2, if ADD only was selected;
otherwise only CH 1, CH 2, or both as
selected by user.
CH 3 and CH 4 As selected by user.
CHOP/ALT CHOP if A sweep is 0.1 ms/div or slower,
ALT If 50 js/div or faster.
CH 2 INVERT Off.
VERTICAL POSITION
CH 1
CH 2
CH3
NOTE—The POSITION controls do
not affect trace vertical position
until moved through the point
corresponding to the trace position
set by AUTO SETUP.
NOTE—The accuracy of POSITION
controls only apply over a tem-
perature range of 15°C to 35°C
when the Instrument is calibrated
between 20°C and 30°C. Speci-
fications are in addition to position
errors caused by VARiable gain
trace shift and input Gate current.
\f selected, ground level allgned with 3rd
graticule line ( +0.5 div) from top; other-
wise no action.
If selected, ground level aligned with 5th
graticule line ( +0.5 div) from top; other-
wise no action.
\f selected, ground level aligned with {st
graticule line ( +0.8 div) from top; other-
wise no action.
2247A Operators
c