![baofeng bf-f8hp chirp programming baofeng bf-f8hp chirp programming](https://sc01.alicdn.com/kf/H394241cefc684d16b4d951d40a460385Z/232989223/H394241cefc684d16b4d951d40a460385Z.jpg)
![baofeng bf-f8hp chirp programming baofeng bf-f8hp chirp programming](https://theprepared.com/wp-content/uploads/2021/03/Baofeng-hero-PB.jpeg)
I've never heard of 75MHz being used anywhere else for voice so it was an educated guess. Why did you immediately go to New Zealand as the OP's location? Most radio enthusiasts don't even bother using them unless they're interested in the commercial side.ĮSA band is 75-80MHz, ESC is 494-502MHz (both reserved for public safety) F band is 470-494 and is mixture of commercial, UHF CB, and public safety and I band is 404-430 and used for fixed links only. Some of those repeaters are linked with 420ishMHz (I band) point to point links and there are some in more urban areas that use 485ishMHz (F and ESC band) as well as the cars having crossband repeaters so cops can use their portables in town and on scene near their cars.ĮSA, ESC, F & I band are just the RSM (our FCC) names for frequency bands to narrow down the exact part of the spectrum. The cop using the radio doesn't see all this, they just select the channel they want (Invercargill, Gore, Te Anau, etc) and the radio does the rest. They share a repeater input over a channel, so the cop picks up the mic and keys up and it goes into the network and is simulcast to the communications center and over all the other repeaters in the channel (and if the channel is linked to a group, it simulcasts to the group as well) and the radio locks to the strongest (not necessarily first) signal it gets. So I'm in Southland and the Southland group is the Invercargill, Gore and Te Anau channels, but some of those channels have more than one repeater. If there was a major event like an armed pursuit (our cops don't generally carry firearms on them although they're in the car) I believe they can add in channels if they're heading into another region so everyone is aware of what's going on. My understanding is that they can tie any of those repeaters together but they're normally tied into regional groups. 3 of the main centres (Auckland, Wellington and Canterbury) use encrypted P25 on VHF instead of the analogue on 75MHz. As a result all police comms go through one network, mostly of analogue 75ishMHz (ESA-Band,) fixed repeaters. In NZ, we only have one police force nationwide, we don't have different forces at county, state, federal levels like the US. One big comment that (hopefully) answers all your questions, as well as gives you a background into how our police radio operates (relevant to OP's question)