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HAM ©
2016
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MULTI RADIO CONFIGURATION EXAMPLE
Setup requirements
So far we have examined configurations for one or two radios using the Double Ten Switch as an antenna path
“expander” between the radio and antenna farm. However, since there is no fail safe commercial antenna switch
with more than two radio ports, when moving to a multi-radio installation the “expander” must be constructed as a
matrix. microHAM have developed the Four + Four (4+4) Switch as a building block for matrix applications; five
4+4 switches and four Double Ten Switches creates matrix switch containing ten (10) A ports and eight (8) R
ports.
The matrix switch is a necessary part of any multi-radio installation and can be built using individual 4+4, and
Double Ten switches or microHAM can provide a packaged matrix. Connections towards radios and antennas
are no different than the non-matrix setups as explained in previous examples. If an installation requires more
than eight R ports (one or more SO2R positions along with several single radio, dual RX positions) and there is
no need to have more than 8 R ports connected to the radios at the same time, additional “steering” switches can
be connected to the R ports of the matrix as in the advanced SO2R setup example. This allows configurations
with up to 32 R ports for connecting transceivers dynamically to ten A ports. In addition, configurations capable
of handling more A ports can be built using additional 4+4 and cascaded Double Ten switches.
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