EXPRESS DAS
Installation and Operations Manual
20
EXPRESS DAS Installation and Operations Manual – Version 2.2 November 2013
3.2.2
Main Combiner Divider Unit (MCDU)
The MCDU combines downlink signals received from the MDBUs, per frequency band, and then splits
them for delivery to the system’s Optic Distribution Units (ODUs). For the reverse path, it combines uplink
signals from each of the ODUs and then divides them for delivery to the individual MDBUs. The unit
supports attenuation (ATT) for input monitoring and input control.
The MCDU has a built-in port to interface with VHF/UHF signals from public safety and 2-way radio
systems.
Figure 3.5 – MCDU at a Glance
The MCDU supports the VHF/UHF frequency band as shown in the following table:
Unit name
Manufacturer
Product No
Description
In/out RF Port
Tx
Rx
VHF/UHF
SC_MCDU
Combining and dividing input signals to send to
ODUs
1 Port
1 Port
Table 3.6 – MCDU – VHF/UHF Frequency Band
Содержание EXPRESS Single-Carrier DAS
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