EXFO FTB-8100 Series Transport Blazer for FTB-500 - Manual (Page 155)

Port Tabs
SONET/SDH Application 141
Port TX (Electrical Interfaces)
Frequency
Note: Frequency offset generation is not available for 10Base-T test.
³
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).
³
Actual Frequency (bps): Indicates the frequency (actual frequency +
Frequency offset) that will be used for transmission.
³
Nominal Frequency (bps): Indicates the nominal frequency of the
signal. The nominal frequencies are listed in the table below.
³
On/Off button: Allows enabling the frequency offset generation. This
setting is disabled (Off) by default.
Interface Frequency Offset a
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.
Nominal Frequency
DS1 ±140 ppm 1544000 bps
E1 ± 70 ppm 2048000 bps
E2 ± 50 ppm 8448000 bps
E3 ± 50 ppm 34368000 bps
DS3 ± 50 ppm 44736000 bps
STS-1e/STM-0e ± 50 ppm 51840000 bps
E4 ± 50 ppm 139264000 bps
STS-3e/STM-1e ± 50 ppm 155520000 bps