ANT-20/ANT-20E
PDH MUX/DEMUX
Introduction
I-1
Introduction
Options BN 3035/90.30 to BN 3035/90.32
1
Multiplex and demultiplex functions
The ANT-20 can generate and analyze PDH frames with complete channel structures at rates
of 2, 8, 34 and 140 Mbit/s when fitted with the PDH Multiplexer/Demultiplexer Chain option. This
allows testing of the multiplex functions of individual hierarchy levels right up to tests covering
all hierarchies from 140 Mbit/s down to 64 kbit/s including linking to SDH signals via the
appropriate mapping stages.
Fig. I-1
TX signal structure
34 M
8 M
2 M
8 M
140 M
8 M
Path multiplexer
34 M
34 M
2 M
64 k
TP
Test pattern in one 64 kbit/s channel
Filler pattern in all other channels
2 M
64 k
Filler pattern in all channels
8 M
2 M
Test pattern
(TP)
TP
TP
Path multiplexer
