Command Syntax

:MEASure:THReshold:METHod  {P105090 | P205080 | UDEFined}

Query Syntax

:MEASure:THReshold:METHod?

Description

Selects the upper, middle, and lower waveform threshold definitions using the following arguments:

P105090

Specifies levels based on 10%, 50%, and 90%.

P205080

Specifies levels based on 20%, 50%, and 80%.

UDEFined

Selects custom user definitions based on absolute amplitudes. Use the :MEASure:THReshold:UNITs command to select levels based on percentages or unit amplitudes. Use the commands listed in the following table to set the actual levels.

Commands to Enter Custom Threshold Levels

Level	Levels Based On
	Percentage	Unit Amplitude
Upper Level	:MEASure:THReshold:DISTal	:CHANnel{N}:UDEFined:DISTal :EMEMory{1:8}:UDEFined:DISTal :WMEMory{1:8}:UDEFined:DISTal :FUNCtion{1:16}:UDEFined:DISTal
Middle Level	:MEASure:THReshold:MESial	:CHANnel{N}:UDEFined:MESial :EMEMory{1:8}:UDEFined:MESial :WMEMory{1:8}:UDEFined:MESial :FUNCtion{1:16}:UDEFined:MESial
Lower Level	:MEASure:THReshold:PROXimal	:CHANnel{N}:UDEFined:PROXimal :EMEMory{1:8}:UDEFined:PROXimal :WMEMory{1:8}:UDEFined:PROXimal :FUNCtion{1:16}:UDEFined:PROXimal

In Eye/Mask mode, use the :MEASure:THReshold:EREFerence command to establish the reference used when setting the custom threshold-definition levels.

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

Example Command Sequence

:MEASure:THReshold:METHod UDEFined
:MEASure:THReshold:UNITs UNITs
:EMEMory2:UDEFined:DISTal 125E-3
:EMEMory2:UDEFined:MESial 0E0
:EMEMory2:UDEFined:PROXimal -125E-3