Threshold Configuration

Meas. mode:

Scope

Eye

TDR

Flex Apps:

FlexDCA

FlexRT

MEASUREMENTS AFFECTED

FlexDCA uses the threshold definitions during these measurements:

Oscilloscope Mode:

Average
Duty Cycle
Fall Time
Frequency
Preshoot
Overshoot
Period
+ Pulse Width
− Pulse Width
Rise Time
Δ Time
Time at Edge
Time at Amplitude
RMS
Amplitude at Lower
Amplitude at Middle
Amplitude at Lower
Optical Modulation Amplitude
Jitter

Eye/Mask Mode:

Duty Cycle Distortion
Rise Time
Fall Time

TDR/TDT Mode:

Rise Time
Fall Time

In Oscilloscope and Eye/Mask Modes, the threshold commands allow you to specify the upper, middle, and lower waveform threshold values. Waveform threshold levels can be set to standard percentages or to user-definited levels based on absolute amplitudes using the :MEASure:THReshold:METHod command. Custom values are specified, depending on waveform source, by the commands listed in the following table.

Commands to Enter Custom Threshold Levels
Level	Levels Based On
Level	Percentage	Unit Amplitude
Upper Level	:MEASure:THReshold:DISTal	:CHANnel:UDEFined:DISTal :DIFF:UNDEFined:DISTal :EMEMory:UDEFined:DISTal :WMEMory:UDEFined:DISTal :FUNCtion:UDEFined:DISTal
Middle Level	:MEASure:THReshold:MESial	:CHANnel:UDEFined:MESial :DIFF:UNDEFined:MESial :EMEMory:UDEFined:MESial :WMEMory:UDEFined:MESial :FUNCtion:UDEFined:MESial
Lower Level	:MEASure:THReshold:PROXimal	:CHANnel:UDEFined:PROXimal :DIFF:UNDEFined:PROXimal :EMEMory:UDEFined:PROXimal :WMEMory:UDEFined:PROXimal :FUNCtion:UDEFined:PROXimal