Technical data

490 Agilent Infiniium 9000 Series Oscilloscopes Programmer's Reference
25 Measure Commands
• ":MEASure:RJDJ:INTerpolate" on page 637
• ":MEASure:RJDJ:PLENgth" on page 640
• ":MEASure:RJDJ:SOURce" on page 644
• ":MEASure:RJDJ:STATe" on page 645
• ":MEASure:RJDJ:TJRJDJ?" on page 646
• ":MEASure:RJDJ:UNITs" on page 647
• ":MEASure:SETuptime" on page 650
• ":MEASure:TIEClock2" on page 705
• ":MEASure:TIEData" on page 707
• ":MEASure:UNITinterval" on page 719
FFT Commands The :MEASure:FFT commands control the FFT measurements that are
accessible through the Measure subsystem.
Measurement
Setup
To make a measurement, the portion of the waveform required for that
measurement must be displayed on the oscilloscope.
• For a period or frequency measurement, at least one and a half
complete cycles must be displayed.
• For a pulse width measurement, the entire pulse must be displayed.
• For a rise time measurement, the leading (positive-going) edge of the
waveform must be displayed.
• For a fall time measurement, the trailing (negative- going) edge of the
waveform must be displayed.
In jitter mode with jitter statistics enabled, measurements are made on all
data regardless of what is on screen.
User-Defined
Thresholds
If you choose to set user-defined thresholds, they must be set before
actually sending the measurement command or query.
Measurement
Error
If a measurement cannot be made because of a lack of data, because the
source waveform is not displayed, the requested measurement is not
possible (for example, a period measurement on an FFT waveform), or for
some other reason, the following results are returned:
• 9.99999E+37 is returned as the measurement result.
• If SENDvalid is ON, the error code is also returned as well as the
questionable value.
Making
Measurements
If more than one period, edge, or pulse is displayed, time measurements
are made on the first, left- most portion of the displayed waveform.