EXFO IQS-1700 High Performance Power Meter for IQS-500/600 - Manual (Page 84)

Performing and Analyzing Graph Acquisitions
76 IQS-1700
Setting Up Graph Parameters
Note: You can only hide or display channels actually used for this acquisition.
Moreover, only channels in the type of unit selected for the acquisition
(absolute or relative) will be displayed. For example, if your graph was set
to dBm units before the acquisition, you will see the graphs for channels
using W or dBm as the unit. If your graph was set to W/W units, you will
see the graph for channels using dB or W/W as the unit.
To select which type of display to use during the acquisition:
Go to the Settings tab of the Graph Center and click the button
corresponding to your choice:

Continuous Scroll: The display will scroll along to the right as the
acquisition progresses.

Wraparound: Once the acquisition has reached the end of the screen
to the right, it will begin on the left again and cover the previous trace.