PAM EECQ

Instrument
N1000A
N109x
Flex Apps:
FlexDCA
Meas. mode:
Eye
Waveform type:
PAM
Electrical
Package License:
L-RND
L-MFG
Eye Mode
PAM Analysis Setup
PAM Toolbar

The EECQ (Electrical Eye Closure Quaternary) measurement is an electrical version of the TDECQ. Because EECQ is a PAM4 electrical measurement, its value is double the TDECQ measurement as the math is 20 log10 instead of 10 log10.

This measurement requires pattern lock.

To Perform an EECQ Measurement

Use this procedure to make a compliant EECQ measurement.

  1. Connect the PAM4 electrical signal to an electrical input channel.
  2. In Eye/Mask Mode, click Measure > Waveform Signal Processing. In the Setup dialog, select the Signal Processing tab.
  3. Install the Reference Rx operator.
  4. Click on the operator to open the Reference Receiver Setup dialog. In the dialog's Select Equalizers tab, select the CEI-112G-Linear TP1a (53GBd) Preset. This preset places the reference point at the correct location, affects whether the measurement’s added noise is amplified by the noise gain of the equalizers.
  5. The output of the Reference Receiver operator is the signal on which the measurement should be performed.