EXFO FTB-800 Series for FTB-1 - Manual (Page 212)

Test Setup - Test Configurator, Timer, and System
202 FTB-700G/800 Series
Signal (Transport)

Step Size (ppm) allows to set the increment/decrement value (from
0.1 to either 50 or 120 depending on the test configuration) that will be
used when changing the frequency offset with the “+” or “-” button.
RX Frequency

Frequency (GHz) indicates the frequency of the input signal.

Offset (ppm) indicates the frequency offset between the standard rate
specification and the rate at the input signal.
Note: For both Frequency and Offset the following background colors are used.

Max. Negative Offset (ppm) indicates the maximum negative
frequency offset between the standard rate specification and the rate
from the received signal.
OTU1e ± 120 ppm 11049107143 bit/s
OTU2e 11095727848 bit/s
OTU1f 11270089286 bit/s
OTU2f 11317642405 bit/s
a. The frequency offset range is guaranteed for a source signal at 0 ppm. In the event
that the source signal already has an offset, then the output signal may exhibit an
offset larger than the range specified.
Background color Description
Green The frequency is in range.
Red The frequency is out-of-range. LOC is also
displayed.
Gray Pending state.
Interface Frequency Offset a Nominal Frequency