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100

101

:MEASure Commands 19

Agilent InfiniiVision 3000 X-Series Oscilloscopes Programmer's Guide 369

:MEASure:TVALue

(see page 860)

Query Syntax

:MEASure:TVALue? <value>, [<slope>]<occurrence>[,<source>]

<value> ::= the vertical value that the waveform must cross. The

value can be volts or a math function value such as dB,

Vs, or V/s.

<slope> ::= direction of the waveform. A rising slope is indicated

by a plus sign (+). A falling edge is indicated by a

minus sign (-).

<occurrence> ::= the transition to be reported. If the occurrence

number is one, the first crossing is reported. If

the number is two, the second crossing is reported,

etc.

<source> ::= {CHANnel<n> | FUNCtion | MATH | WMEMory<r>}

<n> ::= 1 to (# analog channels) in NR1 format

<r> ::= 1-2 in NR1 format

When the :MEASure:TVALue? query is sent, the displayed signal is

searched for the specified value level and transition. The time interval

between the trigger event and this defined occurrence is returned as the

response to the query.

The specified value can be negative or positive. To specify a negative

value, use a minus sign (- ). The sign of the slope selects a rising (+) or

falling (- ) edge. If no sign is specified for the slope, it is assumed to be

the rising edge.

The magnitude of the occurrence defines the occurrence to be reported.

For example, +3 returns the time for the third time the waveform crosses

the specified value level in the positive direction. Once this value crossing

is found, the oscilloscope reports the time at that crossing in seconds,

with the trigger point (time zero) as the reference.

If the specified crossing cannot be found, the oscilloscope reports

+9.9E+37. This value is returned if the waveform does not cross the

specified value, or if the waveform does not cross the specified value for

the specified number of times in the direction specified.

If the optional source parameter is specified, the current source is

modified.

Return Format

NOTE

This query is not available if the source is FFT (Fast Fourier Transform).

1 2 ... 364 365 366 367 368 369 370 371 372 373 374 ... 969 970

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Agilent Technologies InfiniiVision 3000 DSO-X 3054A Manuale di Servizio Pagina 369

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