GUILFORD COUNTY 
Amateur Radio Emergency Service

 

                                          
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Cross Banding Presentation

  

Cross band repeating is a feature with some VHF-UHF dual banders that simply repeats what it receives on one band and automatically retransmit it on the other band.

 SIMPLEX CROSSBAND

 Allows two htís to communicate on different bands.You will need a cross-band radio. (another HT or mobile with cross band)You do not set the HTís you are talking on in cross band.  Set one ht to a simplex vhf frequency and the other to a uhf simplex frequency. Put both of the frequencies into the vhf-uhf dual banders and set it to crossband.  Effectively extends the range of the htís on simplex.

 FULL DUPLEX CROSSBAND TO A REPEATER

 Allows an ht to have the range of your dual-bander. Set your ht to a suggested SERA 440 cross band frequency. (example 440.775 for fixed station). Set up your dual bander with a repeater frequency (example 145.15 -) and also the 440 frequency that is in your ht (440.775).  Now set your dual bander to crossband and you have it. When you key up your ht you will be transmitting on the 440 to the 145.15. You will be receiving the 145.15 back to your ht on the 440 side.  You can also do this on a simplex frequency.

 HALF DUPLEX CROSSBAND TO A REPEATER

 KEY-YOU MUST HAVE AN HT CAPABLE OF DUAL RECEIVE AND BE ABLE TO HEAR THE REPEATER CLEARLY ON YOUR Ht 

 Set your ht to a sugested  SERA cross band frequency(example 440.775 for a fixed station) and the repeater frequency 145.15.  You need to set the dual-band mobile with the input frequency on the 2 meter side and the 440 frequency on the 440 side(to receive the 440 signal from you HT)Set your dual bander  mobile with the input frequency of the repeater        ( example 144.55 for the 145.15  ) and the 440.775 frequency in your ht). Now set your dual bander mobile to cross band and youíre in buisness. Your HT must silence the sub band when you transmit so you will not hear an echo. (Alinco DJ V5 does this in split operation) When you transmit on your ht (440.775) you go to the input of the repeater. Then to hear the repeater you are listening on the repeater output with your ht. What this does is limits the amount of time that your dual band mobile is transmitting.  It only transmits when you transmit or when your dual band mobile receives a signal on the input side of the machine.  I know this is a little confusing but this gives you something to build on.

 SERA SUGGESTED CROSS BAND FREQUENCIES

 FIXED STATION   440.7375  440.7625  440.775  440.7875  440.8125 440.8250  440.8375  440.850  440.8625  440.8750  440.8875  440.900

 MOBILE STATION   445.7375  445.7625  445.775  445.7875  445.8125  445.8250  445.8375  445.8500  445.8625  445.8750  445.8875  445.900

 Setting up the Alinco 610 to cross band.  Put your respective frequencies into the dual bander. To enable crossband while holding function button press the vhf.  To disable while holding the funtion buttom press uhf.

 Setting up the Kenwood TM-V7  Put in your respective frequencies into the dual bander. To enable crossband Press Cont Select button(located between the two volume controls)the display above the VHF band will show ctrl. Turn the radio off. Press and hold the left voume control while you turn the radio on. Now above the uhf band the ptt will be blinking. To disable press and hold the left volume control while turning the radio on. Thatís it

 

 

 

 

 


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The Emergency Coordinator is John Doggett, AJ4DV