Now the problems with digital 800
It's expensive. It uses more computers. When you key up a radio you are transmitting in the 700mhz range. The signal hits closest tower, goes to computer, is assigned a frequency and is retransmitted on the talkgroup on 800mhz. . StL PD has been trunked for a long time and FD was once trunked for short time but they didn't like it.
Thanks for the confirmation!Yes. St. Louis FD is on the 800 MHz P25 trunked system full time now. The switch happened quickly and is pretty complete. They do not simulcast on the old VHF frequencies. At night, they've been using tones on the old VHF dispatch frequency (154.13) but it's just the tones, no voice. Dispatch is on the trunked system 24/7. The tone on VHF is different from the tone on the trunked system.
On VHF I used to hear just dispatch. Now I hear mobiles and portables and even identify them through radio IDs, although I haven't identified all the radios yet.
I don't know but I seriously doubt it. I get the impression that the St. Louis FD has moved on and does not have any serious problems with the new system (except that they still need the tone out feature of the old system at night). The speed with which they seemed to adapt to the new system kind of surprised me.Do you know if they still use 460.175?
Excellent analysis and I agree with what you said. It's all about Motorola establishing a monopoly and taking advantage of people who know very little about what they're buying with taxpayer money. The move to digital trunked systems is one of the great con jobs of our time. Motorola is the big winner and everybody else is a loser. What bothers me most is the extent to which it seems to be government policy to make sure Motorola has a monopoly. Motorola evidently has the best lobyists and the best legislators money can buy. I can't wait for Frontline to do a story on this.To answer your 800 mhz question I'm going to try and be as polite regarding the situation and non-political. I however am a very honest person so here it goes...
That's one way of looking at it but I think the opposite terminology is more common. Perhaps it's nit-picking but I think it's common to say that dispatch transmits on 154.325 and that the callback frequency is 154.4. I think most databases list the truck frequency as the response or callback frequency, not the other way around.North Central trucks to my knowledge actually transmit on 154.400 but dispatch callsback on 154.325.
That's the real question, isn't it? If everyone will be switching to a P25 digital trunked system in a few months, then maybe what you should be thinking about is a digital scanner and not a better antenna. You can probably rig up a better antenna for very little money. Sometimes simply moving a scanner a little bit helps a lot. Putting an antenna higher may help a lot. Those things cost nothing. A digital scanner can be expensive. The "word on the street," at least for now, is that fire talkgroups in St. Louis County will not be encrypted. But I don't believe it 'til it happens.Do you have any recommendations for both outdoor and indoor/desktop antennas? Do you think it's even worth the investment if everyone's switching over to 800 MHz??