Tektronix 2252, Руководство оператора, Страница: 86 / 114

Operators Familiarization
if less than two cursors are currently displayed, trigger level cursor for the A
Trigger will be displayed if:
TRACK TRIG LVL is underlined and the Horizontal Mode is A or ALT, and
the Trigger Mode, Source, and Coupling are valid, and
the A trig source channel is not the same as the C/T measurement chan­
nel while a C/T fneasurement is running and displaying a B trig cursor.
If less than two cursors are currently displayed, a trigger level cursor for the B
Trigger will be displayed if:
TRACK TRIG LVL is underlined, and
the Horizontal Mode is ALT or B, and
the Trigger Mode, Source, and Coupling are valid.
Track
f h
Cursors
If one or no measurement or trigger level cursor is displayed, up to two ground
cursors (not more than two cursors total) may be displayed if the following
conditions are met:
TRACK fh is underlined and CH 1 and/or CH 2 Vertical MODE is
selected.
Trigger-source channel (CH 1 and/or CH 2) VOLTS/DIV VAR control Is in
detent.
Behavior for Horizontal Mode Changes
If the Horizontal MODE is changed to a mode that cannot be used for the
active measurement, that measurement will be canceled without a message
being displayed. Returning to a mode that may be used and pressing the
LAST MEAS’MT button will restore the canceled measurement mode (if no
other measurement selection is made first). See Table 3-1 for compatible and
incompatible modes.
Gated-voltage measurements wilt not run in SGL SEG Trigger MODE. Any
gated Volts measurement that is active will be canceled if SGL SEQ Trigger
MODE is selected, if a gated-voltage measurement is selected while SGL
SEG is also selected, the message NOT ALLOWED IN SSEQ is displayed for
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2252 Operators