# PAM Pk-Pk Amplitude

Meas. mode:

Eye

Waveform type:

PAM

NRZ

The Eye mode IEEE 802.3cu compatible *Pk-Pk Amplitude* measurement returns a value in Volts for an electrical signal or Watts or dBm for an optical signal. The Pk-Pk amplitude measurement is defined as:

Where:

**P**is based on a 1e-2_{max}*hit ratio*, where P_{max}is the smallest power level that results in the number of samples above that level not exceeding the product of hit ratio and total number of observed samples. All samples are acquired in a single unit interval eye diagram.**P**is based on a 1e-2_{min}*hit ratio*, where P_{min}is the largest power level that results in the number of samples below that level not exceeding the product of hit ratio and total number of observed samples. All samples are acquired in a single unit interval eye diagram.

This measurement can also be performed on an NRZ signal.

The *hit ratio* default setting is 1e-2 and is based on the IEEE 802.3cu standard. However, after selecting the measurement you can change this ratio if needed.

## To measure

- Select Eye/Mask Mode.
- Click the toolbar's
**PAM**tab. - Click
**Auto Scale**in the menu bar. - Click the
**More**buttons to locate the**Pk-Pk Amplitude**button. - Click the button.

## SCPI Command

`:MEASure:EYE:PAM:PPAMplitude`