Exfo FTB-800 Series for FTB-1 Manuel d'utilisateur télécharger pdf (Page 122)

100

101

Test Setup - Test Configurator, Timer, and System

112 FTB-700G/800 Series

Clock

 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.

Ext Clock Out

Note: Available when the Clock Mode is set to Internal, or Recovered,.

Allows to set the clock generated on the EXT CLK port.

 Interface Type allows the selection of the clock interface:

DS1 (default), E1, and 2MHz.

Ext Clock Out on a green background indicates that a valid clock is

generated on the EXT CLK port.

LOC on a red background indicates that no clock is generated on the

EXT CLK port.

 LBO (Line Build Out), available with DS1 only, allows the selection of

the interface Line Build Out that meets the interface requirements over

the full range of cable lengths: DSX-1 (0-133 ft) (default),

DSX-1 (133-266 ft), DSX-1 (266-399 ft), DSX-1 (399-533 ft), and

DSX-1 (533-655 ft).

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)

1 2 ... 117 118 119 120 121 122 123 124 125 126 127 ... 620 621

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Exfo FTB-800 Series for FTB-1 Manuel d'utilisateur Page 122

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