S-6
Specifications
PDH MUX/DEMUX
ANT-20/ANT-20E
3
Drop&Insert / Through Mode / Block&Replace
Option: BN 3035/90.20
3.1
Functions
This Option provides the following functions for all PDH multiplex options fitted to the ANT-20.
Drop&Insert
Generator and receiver operate independently as mapper and demapper. The signal from a
selected channel is dropped from the receive signal and output to a connector. An external
signal is inserted into the transmit signal.
Fig. S-1
Drop&Insert: Generator and receiver operate independently
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.
Fig. S-2
Through Mode: Generator and receiver coupled
