Reference

Automatic Eye Measurements. When the Eye display is selected, you can use the Eye Meas. soft key to turn on or off a readout that displays automatic measurements of the eye waveform (see Figure 3-7). The measurement readouts are colored red when the eye waveform exceeds the defined thresholds.

Use the Set Default Thresholds soft key to set the eye measurement thresholds to the levels defined by the associated standard (SD signals: SMPTE 259M;

HD signals: SMPTE 292M). Use the Set Meas Thresholds soft key to set custom threshold levels.

NOTE. The automatic eye measurements are based on the eye waveform display. To ensure the best eye measurement conditions, the instrument sets the clock recovery bandwidth set to 1kHz. While the automatic eye measurements are running, the instrument prevents you from adjusting the recovery bandwidth setting or from adjusting the following signal controls: vertical and horizontal position, sweep and gain settings, and Line Select mode.

Reporting Automatic Eye Measurement Errors. When enabled in the Physical Alarms submenu of the Configure menu, the eye measurement alarms will be reported to the Event Log in only the following two conditions:

HWhen the Eye display is selected and the eye measurement readout is turned on

HWhen the Event Log or Alarm Status displays are selected after the eye measurement readout is turned on

That is, if you enter the Eye display and turn on the eye measurements, and then you use the STATUS button to view the Event Log or Alarm Status displays, the eye measurement alarms will be active. If you select another display mode such as Jitter or Waveform, the eye measurement alarms will be disabled.

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WFM700 Series Waveform Monitors User Manual