EXFO FTB-8510B Guia Del Usuario página 791

Frequency
Note: Frequency offset generation is not available for 10Base-T test.
Frequency Offset (ppm): Allows entering a positive or a negative
frequency offset in ppm. Choices are listed in the table below. The
default setting is 0. The frequency offset value can be changed on the
fly even when activated (On).
Actual Frequency (bps): Indicates the frequency (actual frequency +
Frequency offset) that will be used for transmission.
Nominal Frequency (bps): Indicates the nominal frequency of the
signal. The nominal frequencies are listed in the table below.
On/Off button: Allows enabling the frequency offset generation. This
setting is disabled (Off) by default.
DS1
E1
E2
E3
DS3
STS-1e/STM-0e
E4
STS-3e/STM-1e
a.
SONET/SDH Application
Interface
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.
Frequency Offset
±140 ppm
± 70 ppm
± 50 ppm
± 50 ppm
± 50 ppm
± 50 ppm
± 50 ppm
± 50 ppm
Port Tabs
Port TX (Electrical Interfaces)
a
Nominal Frequency
1544000 bps
2048000 bps
8448000 bps
34368000 bps
44736000 bps
51840000 bps
139264000 bps
155520000 bps
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