Is it actually paranoid reasoning, or is it maybe more of the fact that in order for the smaller outlying areas to be in the know and have interoperability they are having to migrate to the ProVoice system?muddy mudskipper said:Small towns and incoporated cities that dot Bexar County are also looking to move "up" to Provoice communications for a variety of paranoid reasons.
As far as monitoring City and County Services it's encrypted. You can still get most of the suburbs with a Trunking Scanner or Conventional frequencies; Bexar County Fire & Rescue still dispatches to area agencies over conventional frequencies. Those frequencies are in this RR Database. There are few news agencies on some of the commercial LTR systems.djgrial said:I am a cab driver I woul like to know what's going on the traffic, accidents, congestions ...
anybody can help me?
How intuitive.....Cowthief said:Hello.
In Bexar county, the fire department is a bunch of vollies.
Yes, the county has provided ProVoice radios, mounted in the trucks.
County fire alarm will stay on VHF, along with everyone else.
Memorial Hermann Lifeflight down here in Houston does fine useing STAR-Net. They get good coverage, so I don't know what's wrong with your 800MHz antenna or radio....Cowthief said:Hello.
The "biofone" that is in the airlife 'copters is UHF,just look at the antenna.
The media outlets had it right from the beginning, 800 MHz, including cell phones, work poorly if at all in aircraft, the downtilt thing.
However, the discone antenna, like what is atop the medical center hospital, or the baptist, or VA, have a very high angle of radiation, so much so that there really is no ground signal.
The doctors exchange transmits from the same near downtown tower it always has but the offices have moved from the 900 block of san pedro to the medical center.
The other trouble with 800 MHz is the fact that TACAN is on the top end of 900 MHz to 1 GHz, running several hundred watts in pulse mode.
The transponders run 1030 MHz and 1090 MHz at nearly a Kw.
The radios that are approved, and connected to the audio panel, for medical use, are the wulfsberg flitefone.
The biofone is actually a portable unit, it can connect to an external antenna and power, all TSOed, but is really just a talkie with an analog MODEM in a big box.
True, a VHF signal carries further than an 800 signal, however, coverage depends on tower, design, and terrain. There are parts of my county (Caldwell) where the 800 system covers better than VHF and vise versa. I'll also note that both are on the same tower at the same height.Cowthief said:"The other trouble is that VHF has better coverage by far over 800 MHz, ProVoice or not."
I'm not sure where and what that link you provided is referring to, but I can assure you it is not Texas. We are governed by the FCC, not some international law. The frequencies listed are not even close to the interoperable MED channels, VHF or UHF. Look Here at the FCC approved Texas State Interoperability channel plan. What exactly do you mean by "the FCC can not allow 800 MHZ for this type of traffic." If you are talking about pt reports over 800 MHz, The Austin/Travis County 800 MHz radio system uses specific talkgroups for each hospital. Pt reports are given from the ambulance to the hospital via those talkgroups.Cowthief said:"Due to a supreme court ruling, the medical community has complete control over this type of radio system, so there will not be any change to the MED channels,
Again, this is INTERNATIONAL law, The FCC can not allow 800 MHz for this type of traffic."
Where did you find this information? If a system is designed for this, it was a because the customer requested it that way. My system (Caldwell County), Williamson County, and the Austin/Travis Co system all have great coverage from the air. In fact, the Austin/Travis Co System has a talkgroup designated as "STARflight out of county" which is exactly as it labled. This is their out of county mutual aid talkgroup on the system for the STARflight helicopter.Cowthief said:"There is something called "downtilt" built into 800 MHz antennas, this prevents good coverage from the air.
Both Bexar county and San Antonio went to the feds trying to find a fix."