# :MEASure:EYE:PAM:EHEight

PAM Eye Height Commands

- :MEASure:EYE:PAM:EHEight
- :MEASure:EYE:PAM:EHEight:DEFine:EOPening
- :MEASure:EYE:PAM:EHEight:DEFine:EOPening:PROBability
- :MEASure:EYE:PAM:EHEight:EYE
- :MEASure:EYE:PAM:EHEight:FAVorite
- :MEASure:EYE:PAM:EHEight:LOCation?
- :MEASure:EYE:PAM:EHEight:SOURce
- :MEASure:EYE:PAM:EHEight:STATus?
- :MEASure:EYE:PAM:EHEight:STATus:DETails?
- :MEASure:EYE:PAM:EHEight:STATus:REASon?

## Command Syntax

    :MEASure:EYE:PAM:EHEight

## Query Syntax

    :MEASure:EYE:PAM:EHEight?

## Description

Returns the PAM Eye Height measurement for the selected eye. Eye Height measures the vertical opening for the selected eye of a PAM signal. Select the eye measurement to be returned using the `:MEASure:EYE:PAM:EHEight:EYE` child command. To measure the eye height for all of the eyes on a PAM signal, you must send this command once for each eye as there is no command for simultaneously measuring all eyes.

For each eye, the eye height is derived from eye boundaries that are located based on zero data "hits" or at an eye opening probability (`:MEASure:EYE:PAM:EHEight:DEFine:EOPening` child command). The probability defines the ratio of total hits in a waveform database column that can occur in the eye's opening. The probability can be set from 1 x 10–1 to 1 x 10–9 using the `:MEASure:EYE:PAM:EHEight:DEFine:EOPening:PROBability` child command. The default probability is 1 x 10–2. No extrapolation is used to determine Eye Widths at a specified probability.

Specify the measurement units with the `:MEASure:PAM:AMPLitude:UNITs` command.

## Related Commands

Command | Equivalent Setting in PAM-N Analysis Setup Dialog Box | Description
--- | --- | ---
`:MEASure:PAM:EYE:ESTiming` | Receiver Sample Timing | Configures the timing for sampling the signal data for all PAM measurements.
`:MEASure:PAM:EYE:ELMethod` | Eye Center Location | Selects the basis for determining the location of an eye's center on the waveform: at maximum eye width or maximum eye height.
`:MEASure:PAM:EYE:PPERcent` | Eye Level Width | Defines the timespan (in percentage of symbol width) over which an eye's amplitude level is measured.
`:MEASure:PAM:AMPLitude:UNITs` | Amplitude Units | Sets the amplitude units for measurement: volts, Watts, or percent.

## Example Command Sequence

    :MEASure:EYE:PAM:EHEight:SOURce ECHannel1_1
    :MEASure:PAM:AMPLitude:UNITs PERCent
    :MEASure:EYE:PAM:EHEight:DEFine:EOPening ZHITs
    :MEASure:EYE:PAM:EHEight:EYE EYE2
    :MEASure:EYE:PAM:EHEight
    :MEASure:EYE:PAM:EHEight?

## Common Measurement Queries

- `:COUNt?`, `:LOCation?`, `:MAXimum?`, `:MINimum?`, `:MEAN?`, and `:SDEViation?` common measurement queries.