Trigger - Tektronix 2245A Operator's Manual

2. Positions the reference and delta delays together In the
1/TIME or TIME measurement mode when the Horizontal
MODE is ALT or A.
3. Sets the B sweep delay time in the DELAY measurement mode
when the Horizontal MODE is ALT or B.
-H —This control has the following functions:
1. Positions the delta cursor in the CURSOR VOLTS, 1/TIME, or
TIME measurement mode when the Horizontal MODE is A
(also X-Y for CURSOR VOLTS).
2. Sets the B sweep delta delay in the 1/TIME or TIME measure­
ment mode when the Horizontal MODE is ALT or B.
® UNCAL In dica tor—Lights when the A AND B SEC/DIV settings are
uncalibrated (variable function in effect).
( 3 ? )
TRACE SEP C ontrol—Positions the B sweep trace vertically with re­
spect to the A sweep trace when ALT Horizontal MODE is selected.
Refer to Figure 2-5 for location of items 32 through 38.
( 3 2 )
A/B SELECT B u tto n —Directs the MODE, SOURCE, CPLG, SLOPE,
and LEVEL controls and Trigger lights (TRIG' D and READY) to either
the A or B Trigger system (A, when lit; B, when not lit).
Either A or B trigger can be selected for any Horizontal MODE; how­
ever, A/B SELECT is preset to A when A Horizontal MODE is
selected, and B when ALT or B Horizontal MODE is selected. No
change occurs when switching from B to X-Y Horizontal MODE.
33
) SLOPE B u tto n —Selects the slope (positive- or negative-going) of
the trigger source signal that triggers either the A sweep or the B
sweep. (Button lit = positive-going; button not lit = negative-going.)
2245A Operators
Controls, Connectors, and Indicators

Trigger

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