Agilent Technologies InfiniiVision 4000 X-Series, Programmer'S Manual

Page: 428 / 1352

428 Agilent InfiniiVision 4000 X-Series Oscilloscopes Programmer's Guide
21
:MEASure Commands
This command defines the behavior of the :MEASure:DELay? query by
specifying the start and stop edge to be used. <edge_spec1> specifies the
slope and edge number on source1. <edge_spec2> specifies the slope and
edge number on source2. The measurement is taken as:
delay = t(<edge_spec2>) - t(<edge_spec1>)
:MEASure:DEFine
THResholds
Command Syntax
:MEASure:DEFine THResholds,<threshold spec>
<threshold spec> ::= {STANdard}
| {<threshold mode>,<upper>,<middle>,<lower>}
<threshold mode> ::= {PERCent | ABSolute}
for <threshold mode> = PERCent:
<upper>, <middle>, <lower> ::= A number specifying the upper, middle,
and lower threshold percentage values
between Vbase and Vtop in NR3 format.
for <threshold mode> = ABSolute:
<upper>, <middle>, <lower> ::= A number specifying the upper, middle,
and lower threshold absolute values in
NR3 format.
• STANdard threshold specification sets the lower, middle, and upper
measurement thresholds to 10%, 50%, and 90% values between Vbase
and Vtop.
• Threshold mode PERCent sets the measurement thresholds to any
user- defined percentages between 5% and 95% of values between Vbase
and Vtop.
• Threshold mode ABSolute sets the measurement thresholds to absolute
values. ABSolute thresholds are dependent on channel scaling
(:CHANnel<n>:RANGe or
":CHANnel<n>:SCALe" on
page 280:CHANnel<n>:SCALe), probe attenuation (:CHANnel<n>:PROBe),
and probe units (:CHANnel<n>:UNITs). Always set these values first
before setting ABSolute thresholds.
Query Syntax
:MEASure:DEFine? <meas_spec>
<meas_spec> ::= {DELay | THResholds}
The :MEASure:DEFine? query returns the current edge specification for the
delay measurements setup or the current specification for the thresholds
setup.
N O T E
The :MEASure:DELay command and the front-panel delay measurement use an auto-edge
selection method to determine the actual edge used for the measurement. The
:MEASure:DEFine command has no effect on these delay measurements. The edges
specified by the :MEASure:DEFine command only define the edges used by the
:MEASure:DELay? query.