:MEASure:THReshold:PROXimal

Meas. mode:

Scope

Eye

TDR

Flex Apps:

FlexDCA

FlexRT

Command Syntax

:MEASure:THReshold:PROXimal  <amplitude>

<amplitude> is a double.

Query Syntax

:MEASure:THReshold:PROXimal?

Description

Sets or queries the lower threshold-definition level. This value is used when making duty cyle distortion, rise time, and fall time measurements with custom threshold definitions based on percent. When custom threshold definitions are based on absolute amplitude, use the :CHANnel, :EMEMory, :FUNCtion, or :WMEMory command refered to in :MEASure:THReshold:METHod.

Use the :MEASure:THReshold:METHod command to use custom threshold definitions. Use the :MEASure:THReshold:UNITs command to select levels base on percentages.

Use the :MEASure:THReshold:DISTal command to enter a upper threshold level. Use the :MEASure:THReshold:MESial command to enter a lower threshold level.

Measurements Affected by `:MEASure:THReshold` Commands
Instrument Mode
Oscilloscope	Eye	TDR/TDT
Average	Duty Cycle Distortion	Average
Duty Cycle	Fall Time	Fall Time
Fall Time	Rise Time	Rise Time
Rise Time		Δ Time
Frequency		Time at Edge
Preshoot		Time at Amplitude
Oversoot
Period
+ Pulse Width
— Pulse Width
Δ Time
Time at Edge
Time at Amplitude
RMS
Amplitude at Upper
Amplitude at Middle
Amplitude at Lower
OMA
Phase
Jitter

Common Numerical Child Commands

This command supports the use of the following common numerical child commands: :DEFault, :MAXimum, :MINimum, and :STEP.

Custom Lower Threshold Limits (Proximal)
Threshold	Approximate Limits
	%	Units
	%	Volts (electrical)	Watts (optical)
Maximum^*	125%	429 mV	676 μW
Default^*	10%	0V	200 μW
Minimum	–25%	–429 mV	–175 μW
*. Limited by middle threshold's setting.

Example Command Sequence

:MEASure:THReshold:METHod UDEFined
:MEASure:THReshold:UNITs PERCent
:MEASure:THReshold:DISTal 9.50E+1
:MEASure:THReshold:MESial 5.0E+1
:MEASure:THReshold:PROXimal 1.50E+1