Measurement Compatibility And Error Messages; Measurements In Single Sequence Mode - Tektronix 2245A Operator's Manual

Operators Familiarization
Measurement Compatibility and Error
CURSORS VOLTS measurements cannot occur when the VOLTS/DIV VAR
control for the channel being measured is not in the detent position. The
displayed error message is " MEAS SOURCE VAR OUT OF DETENT."
TIME and 1/TIME measurements cannot occur when the SEC/DIV VAR
control is out of the detent position. The displayed error message is "VAR
SECS/DIV OUT OF DETENT."
When in ALT or B Horizontal MODE, and the B Trigger MODE is not RUNS
AFTER, a greater then symbol (>) will appear before the delay-time
readout. The readout value displayed is the delay time between the A trig­
ger and the time a B trigger can be accepted by the trigger system. A
question mark (?) will appear in front of the delay time readout for delay
measurements when the DELAY time is set to 0.25 division or less from the
beginning of the sweep.
If a time measurement is selected when in ALT or B Horizontal MODE and
the B Trigger MODE is NOT RUNS AFTER, the displayed error message is
"USE RUNS-AFTER-DELAY TRIG MODE."

Measurements in Single Sequence Mode

All cursor measurements run continuously during SGL SEQ Trigger MODE.
The readout and/or cursors are displayed briefly during single sequence
mode for making a photographic record (or they may be configured to re­
main on—see the discussion on Configure Menu in the " SERVICE MENU
FEATURES" part of this section.) The displayed readout is the value of the
measurement at the instant it is displayed.
B Trigger AUTO LEVEL acquisitions do not occur when the A Trigger
MODE is SGL SEQ.
3-8
Messages
2245A Operators