Model CFX-431A is the triplexer for transmitting/receiving all 3 bands of HF-150 MHz, 400 MHz band and 900 MHz band at the same time

Using one, or two CFX-431A you can connect transceivers and antennas by one coaxial cable.

The combined high quality filters of CFX-431A work to prevent occurrence of TVI on the other hand

(isolation of each connectors are over 50 dB). When using CFX-431A for one frequency, the other connectors can be remain as (open), but additional dummy load will be much better.