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How does cross band repeater function works?

How does cross band repeater function works?

Cross band repeater function as a very useful feature be used on some hand held radios, This function is very useful to support field operations, especially handheld radio operations, in remote locations that don’t have access to high level repeater systems. A crossband system has the ability to work on different frequency bands, as well as frequencies within the same band. The repeater can receive from a user, link to another repeater and transmit to a different user, all on different frequency bands or frequencies within the same band. but do you know how does it works? 

Cross-band repeater working process.

Ham radio VHF/UHF crossband repeater operation is a common use for amateur operators.and it is an effective way to extend the range of your handheld radio. 


Normally Cross-band repeat function will be taken by dual-band/dual monitor mobile radio and a dual-band or UHF/VHF capable handheld radio. Cross-band repeat only works with a two simplex frequencies (one UHF & one VHF) or a UHF simplex and a VHF repeater pair frequency.  You will use the UHF channel on your handheld to communicate to the dual-band mobile. The cross band repeater capable radio then takes that signal and simultaneously transmits it on a VHF frequency (either VHF simplex or repeater). When the VHF station or repeater makes a transmission, the cross band repeater function radio receives and retransmits the signal on the UHF simplex frequency. This is the cross-band repeat process.   

Another important point is The receive sides of both VHF and UHF on the cross-band should have CTCSS (PL) tone encode set to minimize the chance of false triggering by other signals. 


Comment user

Virgilio Ramos Esguerra

Can you teach me how to install a repeater controller using dual band portable radio, what is the best place to put the repeater? Thank you very much.

Comment author

Yolanda Author

Do you mean to use two radios to make a repeater? You can email us for more details. hams@ailunce.com

Comment user


My dilemma is this, I have 2 radios I use, Anytone D878uv for DMR,(jumbo spot phone hotspot). I also have a Tyt TH-9800D Plus. I also have a moblinkd tnc3 that I have setup to work with my anytone. there is a vhf winlink set up 6 miles from my home, am unable to connect to it using my anytone even using my truck antenna. This is my theory cant I set Tyt radio to cross band repeater, set my anytone and moblinkd to a UHF Freq into Tyt Radio, then have it transmit on VHF 145.030 which is what the local winlink server is setup on. and pass data across the two bands. 73 KL5GI

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