Tektronix 2252, Руководство оператора

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Operators Familiarization
button (if menus are configured to disappear). While the totalize
measurement is running, the RESET label will stay on screen in the absence
of any other menu. Canceling the totalize measurement will also cancel the
RESET label. The RESET function is momentary, so the label never gets
underlined. If another menu is called up then canceled, the RESET label
reappears.
C/T Measurement Menu Page 1
(C T R /T S M E R ) F R F Q
R E S E T
P E R IO D
W ID T H
T O T A L IZ E
FR E Q R A T IO
(T O O A T E D M E A S M T M E N U )
Cotmter/Timer Menu. Totalize Reset Menu.
For these measurements, all B trigger modes operate as usual for triggering
the C/T. B source LEDs are turned off. The measurement source channels can
be altered in the SET MEAS’MTCHANNEL menu. Ail B coupling modes may
be used, and B slope may be changed to control which edge polarity triggers
the C/T. The B trigger light remains off during C/T measurements. However,
indication of proper triggering is shown with a steadily blinking Ct character
in the top line of the readout. If an external frequency reference source is
plugged into the rear-panel EXT C/T REFERENCE INPUT BNC, the a char­
acter will have the ET character above it.
In TOTALIZE, the Ct character stays on continuously, and B AUTO LEVEL
MODE only works when measurement is first selected. After that, no indi­
cation is given if B trigger is lost. However, B AUTO LEVEL MODE may be
reseiected to acquire a new trigger level.
FREQ — Measures the frequency of the selected source channel.
PERIOD - Measures the period of the selected source channel.
W IDTH—Measures the width of the selected source channel.
TOTALIZE — Displays a running count of trigger edges from the selected
source channel.
NOTE
The totalize count is reset to zero whenever a front panel
switch/button is movedlpushed.
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2252 Operators