Why not just reach out to All Comm directly for help? They did the radio work for Northbridge. (781) 289-3000.
Northbridge FIRE Dept
- Thread starter KB1UAM
- Start date
I didn't know who did the work.
AJ1L
Member
I can confirm that they are C4FM, not LSM/CQPSK
Well that contradicts what others in the thread have suggested. Unless they’re only using one repeater site. I guess i
Need to reach out to All Comm
Need to reach out to All Comm
AJ1L
Member
You can consider this your communication with All Comm.
AJ1L
Member
Also just using one TX site doesn't mean that a system is C4FM or LSM/CQPSK. There are C4FM systems that are simulcast, and LSM/CQPSK systems that are single site, possibly ready for future expansion.
Even better!! I’m a former NFD member who now does the radio programming for Hopkinton Fire. I’m trying to add NFD to our D7 zone since we are on their run assignments for I think a 3rd alarm. So I just want to get this to work. So they aren’t running a satellite type system with multiple repeater sites? I know they have a site at the water tank on Hill St which is the highest point in town. So I’ll need to use the CF4M
Modulation. What about their analog channel? I’m using mixed mode on the new channel rx side. Also left the analog as its own channel. We have all P25 radios at HFD so is this best practice?
AJ1L
Member
Yes right now it's just a single site, not positive on the location as I wasn't in on the repeater install, but I'd imagine it's the same. The repeater is mixed mode, so will operate analog or P25 from the same location.
creeperjeep
Lit GMRS
Well I just programmed a neighboring town's portables and they are working with the provided info.
CF4M modulation? Mixed mode or Astro for RX?
creeperjeep
Lit GMRS
Mixed C4FM
I can never get those letters right
Continuous 4 Level Frequency Modulation. Thinking of what the acronym stands for will help.
I will also tell you I can no confirm first hand that the information provided by NFD to their mutual aid partners was accurate and works correctly. And sounds very good.
