EXFO FTB-1, User Manual

Page: 139 / 675

Test Setup - Test Configurator, Timer, and System
NetBlazer
127
Clock
For E1:

TERM
provides an input that terminates the E1 signal.

MON provides high-input impedance and compensation for
resistive loss. This setting is useful for monitoring E1 signals at
monitor points, which are resistor-isolated.

BRIDGE
provides high-input impedance for bridging lines that are
already terminated. This setting is useful for bridging directly
across copper cable pairs.

Line Coding allows the selection of the interface line coding.
For DS1:
AMI
and
B8ZS
(default).
For E1: AMI and HDB3 (default).

Framing
: Allows the selection of the interface framing.
For DS1: SF , SLC-96 , and ESF (default).
For E1:
PCM30
(default),
PCM30 CRC-4
,
PCM31
, and
PCM31 CRC-4
.

Frequency (MHz) displays the frequency of the received signal rate.

Offset (ppm)
displays the positive or negative frequency offset
between the standard rate specification and the rate from the received
signal. The background color is used to indicate if the received clock
meets (green) or not (red) the standard rate specification.
Signal Standard Rate specification
DS1 1544000 ± 8 bit/s (± 4.6 ppm)
E1 2048000 ± 10 bit/s (± 4.6 ppm)
2MHz 2048000 ± 10 bit/s (± 4.6 ppm)