Tektronix DSA8200 Series User Manual

Commands Listed in Alphabetical Order
Syntax
MEASUrement:M
EAS<x>:REFLevel<x>:METHod {RELative | ABSolute
| HIDel ta | LODelta | AOPt}
MEASUrement:MEAS<x>:REFLev el<x>:METHod?
Related Comma
nds
MEASUrement:MEAS<x>:REFLevel<x>:ABSolute:HIGH, MEASUrement:
MEAS<x>:REFLevel<x>:ABSolute:LOW, MEASUrement:MEAS<x>:
REFLevel<x>:ABSolute:MID, MEASUrement:MEAS<x>:REFLevel<x>:
RELative:H
IGH, MEASUrement:MEAS<x>:REFLevel<x>:RELative:LOW,
MEASUrement:MEAS<x>:REFLevel<x>:RELative:MID
Arguments
RELative calculates the reference levels as a percentage of the High/Low
amplitude (High amplitude minus the Low amplitude). The default values
are 90% for the high reference level, 10% for the low reference level, and
50% for the mid reference levels. You can set other percenta ges using the
MEASUrement:MEAS<x>:REFLevel:RELative commands.
ABSolute uses reference levels set explicitly in absolute user units with
the MEASUrement:MEAS<x>:REFLevel:ABSolute commands (see related
commands above). This method is useful when precise values are required
(for example, when you are designing to published interface speci fi cations
such as RS-232-C). The default values are 0 V for the high reference level,
the low reference level, and the mid reference levels.
HIDelta sets the reference levels as absolute amplitude delta values from
the High level.
LODelta sets the reference levels as absolute amplitude delta values from
the Low level.
AOPt sets the reference level to best measure Optical Modulation Amplitude
(OMA) on Pulse waveforms, and is t he default selection when taking OMA
measurements on Pulse or NRZ waveforms. OMA measurements are
described in the User Online Help, which is accessible from the instrument
Help menu.
Examples
MEASUREMENT:MEAS1:REFLEVEL 1:METHOD RELATIVE sets the m ethod of
calculating the reference levels to relative for Measurement 1; the default values
are 90% for the high reference level, 50% for the mid reference level, and 10% for
the low reference level.
MEASUREMENT:MEAS8:REFLEVEL 1:METHOD? might return
MEASUREMENT:MEAS8:REFLEVEL 1:METHOD ABSOLUTE, indicating
the reference levels used are set to absolute values in user units.
DSA/CSA/TDS8X00/B Series Programmer Manual 2-233

Tektronix DSA8200 Series Specifications

General

Brand	Tektronix
Model	DSA8200 Series
Category	Test Equipment
Language	English