Drop&Insert / Through Mode / Block&Replace; Functions - Wavetek ANT-20 Operating Manual

M13 MUX/DEMUX
3 Drop&Insert / Through Mode / Block&Replace
Option BN 3035/90.20
3.1

Functions

This option provides the following functions for all mapping options fitted to the ANT-20.
Drop&Insert
Generator and receiver operate independently as multiplexer and demultiplexer. The signal
from a selected tributary is dropped from the receive signal and output to a connector. An
external signal is inserted into the transmit signal.
Fig. S-1
An unbalanced digital input and output are provided on the mainframe instrument for dropping
and for inserting tributary signals (see Sec. 3.2.1, Page S-8 and Sec. 3.3.1, Page S-9).
The mainframe instrument is also equipped with a balanced output [13] and input [12] for
dropping and for inserting tributary signals via balanced interfaces
Through Mode
The received signal is looped through the ANT-20 and re-transmitted by the generator.
The ANT-20 operates in Through Mode as a signal monitor without affecting the signal content.
Fig. S-2
The looped-through signal can also be jittered using the Jitter Generator options (Jitter
Generator up to 155 or 622 Mbit/s, BN 3035/90.60 to 61). This function is available for all bit
rates fitted to the instrument.
S-6
Drop&Insert: Generator and receiver operate independently
Through Mode: Generator and receiver coupled
ANT-20/ANT-20E
Specifications