This is a system that actually uses meteor burst propagation to carry high reliability traffic. ELOS stands for Extended Line Of Sight, and uses whatever it takes to get through... forward scatter, E layer, meteor trails, whatever works. The low band frequency is critical to it's success.
Low Band VHF IN 2018
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This is a system that actually uses meteor burst propagation to carry high reliability traffic. ELOS stands for Extended Line Of Sight, and uses whatever it takes to get through... forward scatter, E layer, meteor trails, whatever works. The low band frequency is critical to it's success.
It’s the state of California. They’ll say it is, buy a “solution”, get it half working, run out of money, demand more, get it “working” and everyone will hate it and it won’t work right.
captaincab
Member
I am in Delaware County right outside Philadelphia we use low band for county wide fire dispatch and ems dispatch. We also have a county wide Ema and county wide fire police low band channel. But those aren't used as much. City of Philadelphia haste system uses a low band frequency for trauma alerts to hospitals also.
@captaincab
Do you hear much on the Philly Hospital Alert frequency? I have it punched in my base radio and because their is no PL all I get is a near by bus company.
Do you hear much on the Philly Hospital Alert frequency? I have it punched in my base radio and because their is no PL all I get is a near by bus company.
Martin County Florida--VHF--154.010---Used for Tone Out Dispatch and Then the Units and Dispatch go to the Slers System--(800)
Not That Much Low Band Down in These Parts----Back Up In Long Island 46.100 (Nassau County) for Tone Outs--Uhf for Fire Ops
46.460--(Suffolk County) Tone Outs---Uhf for Fire Ops But I Hear Things are Changing for Suffolk
Not That Much Low Band Down in These Parts----Back Up In Long Island 46.100 (Nassau County) for Tone Outs--Uhf for Fire Ops
46.460--(Suffolk County) Tone Outs---Uhf for Fire Ops But I Hear Things are Changing for Suffolk
154.010 is VHF High band not Low Band.
quarterwave
Member
From research I have done several times in assisting with licensing and spectrum issues, and from tracking frequency and system changes in counties local to me, I see another reason why there are still a lot of licenses "active", at least in the FCC DB.
At the administrative level in public safety / local government, and even companies like the one I worked for and took lead in narrow-banding and audit on their systems a few years ago, much of that happens just because "that's what we have always done". So, in more detailed example, in several instances around where I live, the county Sheriff hasn't been on LB for years, many years, don't even have radios in cars or working base stations anymore. However, on the administrative side, when the renewal comes due, they just see a radio license, they renew it and move on. There isn't thought about... "Do we still use this frequency?", they don't ask, maybe no one there knows without asking the radio shop, and usually there is no one there to discern what is what anyway.
So, many of these just get renewed because a renewal notice is sent. I asked, and that was the answer I got in a couple of cases with LB licenses.
The company I helped 4-5 years ago with their VHF was simply going to renew an IMTS and Paging license. The IMTS base had been off air for 6-7 years, and the paging base had not been used for at least 4 years as the encoder blew up and they were switching to employee cell phones anyway. So there again, just do what we always did. I subsequently cleaned that up, cancelled the licenses, narrow banded the VHF repeater they had, added a couple new splinter itinerants so they could stop using 154.570 illegally in 45 watt mobiles...and got everything on track. The repeater has extremely good coverage (even in narrow), but sadly they have few mobiles installed now, no base stations/remotes being used or hooked up and it's status as backup system to their cell phones is about lost, and no one knows what to do, or what they have since I left. Sad.
At the administrative level in public safety / local government, and even companies like the one I worked for and took lead in narrow-banding and audit on their systems a few years ago, much of that happens just because "that's what we have always done". So, in more detailed example, in several instances around where I live, the county Sheriff hasn't been on LB for years, many years, don't even have radios in cars or working base stations anymore. However, on the administrative side, when the renewal comes due, they just see a radio license, they renew it and move on. There isn't thought about... "Do we still use this frequency?", they don't ask, maybe no one there knows without asking the radio shop, and usually there is no one there to discern what is what anyway.
So, many of these just get renewed because a renewal notice is sent. I asked, and that was the answer I got in a couple of cases with LB licenses.
The company I helped 4-5 years ago with their VHF was simply going to renew an IMTS and Paging license. The IMTS base had been off air for 6-7 years, and the paging base had not been used for at least 4 years as the encoder blew up and they were switching to employee cell phones anyway. So there again, just do what we always did. I subsequently cleaned that up, cancelled the licenses, narrow banded the VHF repeater they had, added a couple new splinter itinerants so they could stop using 154.570 illegally in 45 watt mobiles...and got everything on track. The repeater has extremely good coverage (even in narrow), but sadly they have few mobiles installed now, no base stations/remotes being used or hooked up and it's status as backup system to their cell phones is about lost, and no one knows what to do, or what they have since I left. Sad.
Yah I Realized That After I Posted it and Your Post After Mine Made it Non Editable--Thanks for the PPD Heads Up
Looking More Into What You Said--I Searched Hi & Low and All the Searches on Fcc and Other Sites Show
Very high frequency VHF 30–300 MHz
10.0–1.0 m FM, television broadcasts, line-of-sight ground-to-aircraft and aircraft-to-aircraft communications, land mobile and maritime mobile communications, amateur radio, weather radio
Ultra high frequency UHF 300–3,000 MHz
1.0–0.1 m Television broadcasts, microwave oven, microwave devices/communications, radio astronomy, mobile phones, wireless LAN, Bluetooth, ZigBee, GPS and two-way radios such as land mobile, FRS and GMRS radios, amateur radio, satellite radio, Remote control Systems, ADSB
VHF is VHF--There is No Hi or Low Band that I Can See
Here is the Wiki-Pedia on Radio Spectrum----
https://en.wikipedia.org/wiki/Radio_spectrum
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n1gye
Newbie
MSP Low Band
Mass. State Police still actively uses their low band system in Berkshire county due to the terrain. Any UHF system they've tried fails miserably in the hills (800 Motorola trunked and P25), so stations B1 and B4 (Lee and Cheshire) still use their old low band channel (42.460) as a co-primary. The P25 system seems to be a bit better with coverage, but the low band always gets through, Same thing happens in the Worcester hills with C8 small town dispatch at times. I doubt MSP will ever totally drop their low band system due to these challenges. Even their brand new cruisers are still being fitted with low band radios (the only exception seems to be Troop E which is being disbanded and metro Boston units).
Mass. State Police still actively uses their low band system in Berkshire county due to the terrain. Any UHF system they've tried fails miserably in the hills (800 Motorola trunked and P25), so stations B1 and B4 (Lee and Cheshire) still use their old low band channel (42.460) as a co-primary. The P25 system seems to be a bit better with coverage, but the low band always gets through, Same thing happens in the Worcester hills with C8 small town dispatch at times. I doubt MSP will ever totally drop their low band system due to these challenges. Even their brand new cruisers are still being fitted with low band radios (the only exception seems to be Troop E which is being disbanded and metro Boston units).
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