User manual

DTS Broadcast PDH Microwave Digital Radio User Manual
-11-
See Figure 2-13 for IDU 1+1 mode panel with no plug-in card. See Figure 2-14 for 4E1 120ohm
balanced plug-in. See 2-15 for 4 ports 10/100BASE-T plug-in.
Figure 2-13 IDU 1+1 without service card
Figure 2-14 4E1 (120ohm balanced) service card
Figure 2-15 4 Prots 10/100BASE-T service card
The main functions of the IDU are data interface card (plug-in), frame multiplexing, diplexer,
modulator, demodulator, DC-DC converter, and CPU alarm/status monitoring and site-to-site
communications. See Figure 2-16 for block diagram of the IDU.
The optional service plug-in cards are carried Tributary Service Data, multiplexed with Auxiliary
Data, EOW Data and CPU site-to-site communication messages in Frame-Mux block. The multiplexed
data will be modulated, forms QPSK signal with 310MHz carrier, and send to ODU by IF cable
through diplexer.