EXFO FTB-8500 Series for FTB-500 - Manual (Page 149)

Port Tabs
Ethernet and Fibre Channel Application 135
Electrical RX
Frequency Analysis
Note: Frequency Analysis is not available for 10Base-T test.

Frequency (bps): Indicates the frequency of the input signal.

Frequency Offset: Indicates the offset between the standard rate
specification and the rate of the input signal.

Max. Positive Offset: Indicates the offset between the standard rate
specification and the largest rate recorded from the received signal.

Max. Negative Offset: Indicates the offset between the standard rate
specification and the smallest rate recorded from the received signal.
Offset Unit: Allows the selection of the frequency offset unit. Choices are
bps and ppm. The default setting is ppm.