18-20
Measure Commands
DEFine
EWINdow
:MEASure:DEFine EWINdow,<ewind1pct>,<ewind2pct>
<ewind1pct> and <ewind2pct> are real floating-point numbers (rounded to the nearest
tenth) that specify an eye window as a percentage of the bit period unit interval. If one
source is specified, both parameters apply to that signal. If two sources are specified, the
measurement is from the first positive edge on source 1 to the second negative edge on
source 2. Source is specified either using MEASure:SOURce, or using the optional <source>
parameter when the DELTatime measurement is started.
RZEWindow
:MEASure:DEFine RZEWindow, <%bit_rate>
Defines the width of an RZ eye window as a percentage of the bit rate.
THResholds
:MEASure:DEFine THResholds,{{STANdard} | {PERCent,<upper_pct>,<middle_pct>,<lower_pct>} |
{UNITs,<upper_volts>,<middle_volts>,<lower_volts>}}
Where <upper_pct>, <middle_pct>, and <lower_pct> are integers ranging from –25 to 125.
<upper_units>, <middle_units>, and <lower_units> are real numbers specifying amplitude
units.
TOPBase
:MEASure:DEFine TOPBase,{{STANdard} |{<top_volts>,<base_volts>}}
<top_volts> and <base_volts> are real numbers specifying voltage.
TREFerence
:MEASure:DEFine TREFerence,{TBASe | ONEZero}
Selects a threshold reference for use in risetime and falltime measurements. The threshold
reference can set to either V
top
and V
base
(TBASe) or the one and zero levels (ONEZero). Eye
mode is required and the :MEASure:DEFine command’s THResholds argument must not be
set to UNITs.
Restrictions The TREFerence argument, requires software revision A.07.00 and above.
Query :MEASure:DEFine? {CGRade | DELTatime | EWINdow | RZEWindow | THResholds | TOPBase | TREFerence}
Returned Format [:MEASure:DEFine] CGR {RZ | NRZ}
[:MEASure:DEFine] DELT, {<start edge_direction>,<start edge_number>,<start edge_position>,<stop
edge_direction>,<stop edge_number>,<stop edge_position>}<NL>
[:MEASure:DEFine] EWIN,<signal_type><NL>
[:MEASure:DEFine] RZAEW,<%bit_rate><NL>
[:MEASure:DEFine] THR {{STAN} | {PERcent,<upper_pct>,<middle_pct>,<lower_pct>} | {VOLTage,
<upper_volts>,<middle_volts>,<lower_volts>}}<NL>
[:MEASure:DEFine] TOPB {{STAN} |{<top_volts>,<base_volts>}}<NL>
[:MEASure:DEFine] TREF {TBASe | ONEZero}
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