Keysight N4917BSCB 400G Optical Receiver Test Application User Guide
77
Performing Stressed Receiver Compliance Tests with N4917BSCB Software
5
After successful completion of the calibration run, the calibration results
are reported in the
Results
tab.
The calibration results include the following measurements:
• Currently used BERT deemphasis taps
• Measured NRZ crossing points (from reference transmitter operating
point optimization)
• Measured PAM4 linearity
• Measured clean eye SECQ (ISI only) (“initial SECQ)
• Measured calibration target metrics
• Screenshot of stressed receiver test signal (without TDECQ filter / with
TDECQ filter)
Generate Stressed Eye Signal
SJ
Periodic Jitter Frequency
119.2 MHz
Periodic Jitter Amplitude
0.05 UI
SI
Sinusoidal Interferer Frequency
1.9431 GHz
GN
Sinusoidal Interferer to
Gaussian Noise Ratio
10 dB
Ceq target value
0.2 dB
(Applicable for IEEE
802.3cd-based flavors)
ISI generation method
Method 1 (default for IEEE
802.3bs-based flavors)
Method 2 (default for IEEE
802.3cd-based flavors)
TDECQ Equalization Filter
Optimization
DCA
Use TDECQ Filter Optimization
Feature
TRUE
Stressed Eye Parameter
Optimization
TX Extinction Ratio (ER) Target
Set by standard
TX Extinction Ratio Tolerance
0.1 dB
Stressed Eye Closure (SECQ)
Target
Set by standard
Stressed Eye Closure Tolerance
0.1 dB
Receiver Power Target
(OMAouter)
Set by standard
Receiver Power Tolerance
0.1 dB
Calibration step
Class
Relevant configuration
variables
Access
Default value
