Recalling The Last Measurement Mode - Tektronix 2247A Operator's Manual

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Operators Familiarization .
Channel 2 Voltmeter measurements, the selected source channel need not
be dlsplayed and Is not automatically turned on when selected. It Is possible
therefore to view a Channel 1 display and have the Channel 2 voltage
measurement value displayed by the readout (and vice versa).
When setting the measurement channel for
I.,_
VOL TS -+f or
rh
VOL TS -+I,
or for RISE, FALL, PROPDLY, or gated CIT measurements, or when set-
ting delay-time and delta-time channels, a vertical channel thAt Is selected
In the menu Is turned on If not previously selected and It remains dlsplayed
when deselected as the measurement source channel. Any vertical channel
traces turned on that are not wanted In the display must be turned off using
the VERTICAL MODE buttons.
The following Illustrations show all the possible menus that may be called up
when the SET MEAS' MT CHANNEL button Is pressed depending on the
measurement mode In effect.
(SET MEASMT CHANNEL)
CH1
CH2
Voltmeter Measurement Channel Menu; also
used to select RISE/FALL measurement source.
(SET COUNTER CHANNEL) CH1
CH2
CH3
CH4
ADD
Single-Channel C/T Measurement Channel Menu.
(SET DELAY TIME CHANNEL) CH1
(SET LI.TIME CHANNEL) CH1
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CH2
CH3
CH4
ADD
(TO .6.CHANNEL MENU)
CH2
CH3
CH4
ADD
(BACK TO DELAY CHANNEL MENU)
Delay-Time and Delta-Time Measurement Channel Menus
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Operators Familiarization
(SET SOURCE/ CHANNEL) CH1
CH2
CH3
CH4
ADD
(TO /SOURCE CHANNEL MENU)
(SET /SOURCE CHANNEL) CH1
(BACK TO SOURCE/ CHANNEL
MENU)
CH2
CH3
CH4
ADD
Frequency Ratio Measurement Channel Menus
(SET START CHANNEL) CH1
CH2
CH3
CH4
ADD
(TO STOP CHANNEL MENU)
(SET STOP CHANNEL) CH1
CH2
CH3
CH4
, ADD
(BACK TO START CHANNEL MENU)
Propagation Delay Measurement Channel Menus
Recalling the last Measurement Mode
When an active measurement has been cleared, either by pressing the
CLEAR DISPLAY button or changing the Horibntal MODE, It may be
reactivated without using the Measurement Menu to reselect It. Press LAST
MEAS' MT to recall the last selected measurement moc:te If no m~asure-
ment mode is active. The LAST MEAS'MT button may also b~ used to
reinitialize an active measurement mode. A press of the b4tton cancels the
active measurement and then recalls it in Its initialized . s tate. Thls feature is
useful for returning VOL TS cursors and, under sbme conditions, TIME cur-
sors or delays to their initialized positions after they have been adjusted
away.
The measurement channel for VOLTMETER, CURSOR VOLTS, and RISE
or FALL measurement modes is set to CH 1 , if CH' 1 is displayed, otherwise
to CH 2. If neither CH 1 nor CH 2 Is displayed, CH 1 will be turned on and
will be the measurement channel. ·
The measurement channel for single-channel CIT measurements Is set to
the lowest number displayed channel (can be CH1, CH2, CH3, CH4, or
ADD) .
Measurement channels for TIME measurement modes (ALT and B Hori-
zontal modes) and dual-channel CIT measurements are set to the lowest
2247 A Operators
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