EXFO Power Blazer 88200NGE, User Manual

Page: 635 / 887

Test Functions
Power Blazer
625
200/400G Advanced - PAM-4 Histogram
200/400G Advanced - PAM-4 Histogram
Note: Only available when using OSFP/QSFP56/QSFP56-DD transceiver on
FTBx-88460 module.
From the Test menu, tap Functions , 200/400G Advanced , and the
PAM-4 Histogram
tab.
The PAM-4 Histogram graph displays for the selected lane the number of
hits at each 160 amplitude levels (PAM-4 Symbol 0 to PAM-4 Symbol 3)
once the acquire process is completed.

Scale
Allows selecting the scale for the histogram hits (Y-axis): Linear
(default) or
Log
(logarithmic).

PAM-4 Lane
Allows selecting the PAM-4 lane that will be used for the histogram
acquisition. The lane displayed on an amber background indicates the
selected lane while the ones on a green background indicate that valid
histograms have been acquired.

Acquire
Enables the PAM-4 histogram acquisition process for the selected lane.
The green LED is on when the acquisition is enabled.
To acquire the PAM-4 histogram for other lane(s), select another lane
either by tapping on its number or using the arrow while the
acquisition is still enabled. Repeat for all required lanes.
Note:
Reactivating the acquisition clears all previously acquired histograms.