Tektronix 2247A

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Basic Applications
d. The Trigger mode is AUTO LEVEL, AUTO, NORM, RUNS AFTER or
SGL SEG.
e. TRACK MEASMT has not been selected or no measurements are
active,
Additionally, the A Trigger LEVEL cursor is displayed in A and ALT Horl-
zontal MODE, and the B Trigger LEVEL cursor Is displayed In ALT or B
Horizontal MODE (both displayed in ALT If conditions are met).
The labels for the Trigger Level cursors are:
ATL A. trigger level
BTL B trigger level
BA TL B delta trigger level
CHx TL B CHx trigger level
CHy TL B CHy trigger level
START TL B start trigger level
STOP TL B stop trigger level
10% TL Rise/fall 10% trigger level
20% TL Rise/fall 20% trigger level
80% TL Rise/fall 80% trigger level
90% TL Rise/fall 90% trigger level
The A and B Trigger LEVEL readouts include the sign (If minus), the integer
and
decimal fractional value of the level, and the units when a cursor Is
displayed. For example:
A.TL.3.25 mV.
NOTE
In the AUTO LEVEL trigger mode when no waveform is dis-
played, the trigger-level cursor will be positioned at the
level at which triggering would occur.
The A and B Trigger Level Cursors are not guaranteed to reach the
waveform If the Horizontal POSITION control is set fully clockwise. Also,
since the Trigger LEVEL cursor may be located anywhere within the viewing
area (and beyond), the labels for those cursors may overlap each other or
the +PK, -PK, and DC or TRACK 7h cursor labels in the displays.
The trigger cursor channel Is determined from the Trigger source as Indi-
cated In Table 5-1.
2247A Operators 5-19