Programming Zone Problems PLEASE HELP! (US Military)

[marine09]

Hey guys, new to the forum. I'm currently in the Marines and we are having some problems programming our XTS2500's. If we do different zones programmed with the same freqs (say zone 2 channel 2 has the same freq as zone 3 channel 2) should they bleed over? I would figure that being in different zones and being secured it would allow us to use the same channel with the same freq but in a different zone, and not have the bleed over? How do we fix this? Thanks.

[alex]

Welcome to the board.

The problem that your having is that while you may be creating different physically selected channels in the radio, it sounds like you are not changing the frequencies, PL, DPL, NAC, or any other property to make them "different."

You need to talk to your communication people who tell you what / how / or do the actual programming. If you change settings on the radio without them knowing you could unknowingly cause problems for another division, group, etc who uses the same frequencies or those close to you.

I urge you to speak with the people in charge of frequency allocation if you need more and see what they can to do help you out.

-alex

[marine09]

We are not changing the frequencies from one zone to the next, i.e zone 1 channel 1,2,3,4 is the same as zone 2's 1,2,3,4. How do I program the radio to not talk between zones 1 and 2 and so forth. We have no other frequencies we can work with, which is frustrating but then that is how the military is.

[xmo]

There is one issue you might have encountered based on this part of the question: "... being secured it would allow us to use the same channel with the same freq but in a different zone, and not have the bleed over?"...

If you are using multi-key secure - you can strap a particular key to a specific mode. When you do that the radio will use that key when it transmits on that mode. You might think that the radio would also restrict itself to using that key for receive when you have that mode selected.

Unfortunately, it does not work that way. Whenever the radio receives a secure transmission it compares the ID of the key [CKR or KID] to all the IDs it has programmed. If it finds a match it will use it.

That means you can't create multiple separate 'talkgroups' on a single RF frequency simply by using multiple secure keys. You could have two different groups of radios that talk on the same channel and never hear each other but you would need to avoid duplication of the key IDs from the one group of radios in the radios of the other group.

Note that this is with respect to the ID of the key. The actual key data can be the same or different. If you have different key data associated with a common key number the radio will unmute and the audio will be unintelligble because the key is wrong.

[chartofmaryland]

What you would like to do cannot work.

If you talk on the same frequency at the same time with 2 radios, it will "bleed over". If its in IMBE, Securenet, DES-OFB, DES, AES-256, analog, or any other modulation. 1 transmitter at a time or you cannot understand each other.

You need another frequency.

The only way around that is TDMA.

CoM

[BurnCe]

Welcome to the board.

The problem that your having is that while you may be creating different physically selected channels in the radio, it sounds like you are not changing the frequencies, PL, DPL, NAC, or any other property to make them "different."

You need to talk to your communication people who tell you what / how / or do the actual programming. If you change settings on the radio without them knowing you could unknowingly cause problems for another division, group, etc who uses the same frequencies or those close to you.

I urge you to speak with the people in charge of frequency allocation if you need more and see what they can to do help you out.

-alex

He is very right i am an air force LMR technician and if you are not a Marine Corps Communications technician u really should not be in the radio at all