RPM14 Programming Trunked Frequency Sets

[BMDaug]

Hello again, so I’m working on a trunked set to NAS my county’s system with my 100P. I’m using the frequency list found on this great forum, however, I’ll enter a frequency from the list and sometimes RPM will scream at me about the receive frequency being out of range. Once this happens, any frequency I try will be out of range, even though it just worked for the channel before it. I’m not sure if this is user error or a glitch.

I’m using an existing mission plan as a template for NAS so maybe there’s a setting that I’m missing somewhere. I’m aware that there are certain ranges for transmit and different ones for receive, and I know that there are particular channel spacing patterns, but are transmit and receive frequencies mathematically related? I’m just beginning to understand trunked systems and I guess I’m not as far along as I thought… Can someone guide me in the right direction or point me to a resource that may help me understand trunking best practices better?

Thanks for reading,
Brian

 

[natedawg1604]

Sounds like your IDEN table (under "IDEN Sets") is not setup correctly. You need to figure out what band plan your system is using, it's very easy if you have a RTL SDR dongle (or a discriminator tapped radio) and Unitrunker or DSD+. Also please be 100% certain you are following the attached instructions, to ensure you don't affiliate.

 

[IFRIED91]

Sounds like your IDEN table (under "IDEN Sets") is not setup correctly. You need to figure out what band plan your system is using, it's very easy if you have a RTL SDR dongle (or a discriminator tapped radio) and Unitrunker or DSD+. Also please be 100% certain you are following the attached instructions, to ensure you don't affiliate.

Figuring out a UHF T-band or VHF bandplan is easier said then done… but not impossible

 

[natedawg1604]

Figuring out a UHF T-band or VHF bandplan is easier said then done… but not impossible

Does it not show up in Unitrunker?

 

[prcguy]

Great write up, thanks! Could this be expanded to show where control channels and other info goes for trunking challenged people?

Sounds like your IDEN table (under "IDEN Sets") is not setup correctly. You need to figure out what band plan your system is using, it's very easy if you have a RTL SDR dongle (or a discriminator tapped radio) and Unitrunker or DSD+. Also please be 100% certain you are following the attached instructions, to ensure you don't affiliate.

 

[BMDaug]

It is a great write up!! You have my thanks as well! I’m working on correcting the idea tables!!

 

[IFRIED91]

Does it not show up in Unitrunker?

OTB (out of band) trunking systems usually (key word USUALLY) do not tx their IDEN data and the only way to build one is to essentially set up the system

 

[2154]

Great write up, thanks! Could this be expanded to show where control channels and other info goes for trunking challenged people?

This one isn't everything but does explain some more of the basics of enhanced CC. You're control channel list will go into the "trunked sets". Keep in mind when programming these, you must program your offset correctly or else it won't take when you try to program it in. If pulling off from this database, go ahead and do the math to figure up what the transmit side would be, then it'll automatically enter the correct rx. (ex. -30.00 on your 700 stuff so enter 770.00625 and it'll automatically enter 800.00625 on your receive.)

 

[TDR-94]

There have been some new 700 mHz frequencies being used on newer 700 mHz systems that RPM14 doesn't allow you to program into a mission plan for the XG-100P. RPM14 will give you an error stating these frequencies are not within the accepted frequency range.

 

[2154]

Interesting. What system/frequencies are these?

 

[IFRIED91]

Interesting. What system/frequencies are these?

Most (MOST NOT ALL) 7/800mhz systems have a universal iden especially if they are Motorola

 

[2154]

Most (MOST NOT ALL) 7/800mhz systems have a universal iden especially if they are Motorola

Not at all what I was referring to, Ira. That was in reference to TDR-94's comment about certain 700 frequencies not taking in RPM14.

 

[TDR-94]

Interesting. What system/frequencies are these?

I don't remember offhand, I'll have to go back and recheck.

 

[IFRIED91]

Not at all what I was referring to, Ira. That was in reference to TDR-94's comment about certain 700 frequencies not taking in RPM14.

My fault read too quickly… but That’s strange… i heard of issues where if u don’t have/have NPSPAC enabled it won’t let u enter certain numbers

 

[rescue161]

OTB (out of band) trunking systems usually (key word USUALLY) do not tx their IDEN data and the only way to build one is to essentially set up the system

While this used to be true for OBT on analog systems, on P25 systems, the OBT system info is always transmitted over the air.

 

[RayAir]

The FNE LID, GenWatch can scan for unauthorized radios by sending affiliation requests to ranges of radio IDs that shouldn't be on the system. I see in the download he made the value a string of 9's and not the default FNE LID.

 

[northstarfire0693]

The FNE LID, GenWatch can scan for unauthorized radios by sending affiliation requests to ranges of radio IDs that shouldn't be on the system. I see in the download he made the value a string of 9's and not the default FNE LID.

And whats the way around that ? Ive read that some will change the FNE LID from default to something else.

 

[TDR-94]

It begs to question, if you have no intention of doing anything other than programming your radio to passively monitor, then why would you feel the need to muck with the FNE LID?

 

[northstarfire0693]

It begs to question, if you have no intention of doing anything other than programming your radio to passively monitor, then why would you feel the need to muck with the FNE LID?

Thats my stance on it. I've read where people will mess with the FNE LID. For passively monitoring a system, your radio is a ghost and I see no reason to mess with it, but thats me. If the radio is set not to register with the system, then it wont affiliate with the system. Now my understanding is a Moto set up for NAS will affiliate if the system request it to.

 

[redbeard]

The idea is to change what ID the radio expects to listen to the FNE on. As RayAir said, the system can send out requests to IDs that aren't affiliated and you could get caught in one of those scans. In theory if you change the FNE LID the radio will ignore affiliate and stun requests from other LIDs.

Your radio may be a ghost, but you can't not program in a radio ID unless you are using a BK radio that lets you set it to ID 0. Any non-0 ID number can be actively pinged from the system.