User's Manual

Table Of Contents
DIB-500 R4.1 Product description
Constituents
58 Installation, Operation and Service Manual 90DIB500R41IM_FCC02 99.1
3.1.8 Cavity coupler (only for the Cavity variant)
The cavity coupler is a hardware component and used for lossless coupling of two to
four radio channels on one transmitting antenna. Cavity couplers are available in the
cavity variant of the DIB-500 R4.1 in a separate equipment rack which can accommo-
date up to four cavity couplers. One cavity coupler is available for each carrier.
The size of the cavity couplers depends on the frequency used, e.g. smaller cavity cou-
plers are used for frequencies > 806 MHz that for frequencies < 486 MHz. Accordingly,
the DIB-500 R4.1 employs different cavity couplers, which vary in size, depending on
the frequencies used.
Figure 3.22 shows the DIB-500 R4.1 in the cavity variant for frequencies < 486 MHz.
The four cavity couplers are installed in a separate equipment rack. Both equipment
racks are already stacked and wired upon delivery.
Figure 3.22 DIB-500 R4.1 cavity variant with four cavity couplers for frequencies
<
486 MHz (front
view)
2
1
6
5
3
4