The FCC caved to NAB and made the out of band emission rules excessively strict in TVWS, making equipment difficult and expensive to build. The 6Mhz channel sizes are too narrow for significant throughput. To get significant bandwidth multiple channels have to be bonded, which multiplies the cost since now you need 2 or more RF receivers. The equipment also has to be wide band to cover the spectrum, yet with very tight filtering.
Basically - a badly designed set of FCC rules, as designed by committee. The perfect compromise - nobody is happy and everyone lost. There is actually hope - there are a number of vendors that have solved the problems and should have product available shortly with decent bandwidth. Mark > On Feb 22, 2016, at 6:21 AM, Adam Moffett <[email protected]> wrote: > > Oh....that being the case, why is there no equipment?� It seemed like > everybody was excited for TVWS ten years ago.� If there's no excitement > now, it's probably because they got tired of waiting for it and moved on with > life. > > If Cambium or UBNT made a 700mhz product where the subscriber equipment was > not $800 and actually worked ok then I have to think people would buy it. > > > On 2/22/2016 6:14 AM, Mark Radabaugh wrote: >> There are several vendors offering the database for TVWS. � The equipment >> manufacturer picks and contracts with the database vendor in TVWS. � >> �For CBSD (3550-3700) the WISP will need to pick the database vendor. >> >> Mark >> >> Please note the mailing and shipping address change below: >> >> Mark Radabaugh >> Amplex >> 22690 Pemberville Rd >> Luckey, OH 43443 >> 419-837-5015 x1021 >> [email protected] <mailto:[email protected]> >>> On Feb 22, 2016, at 6:09 AM, Adam Moffett <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> Does anyone know why the location service never happened? >>> Were the feds supposed to do it, or did they need a private entity to do it? >>> >>> On 2/21/2016 11:13 PM, Chuck McCown wrote: >>>> I will always wonder of the location database came from me.� I did an ex >>>> parte with the FCC years ago when this was first being discussed.� I >>>> wrote up a white paper describing the location database and how it would >>>> work.� What they adopted was essentially exactly what I wrote up.� I >>>> added it being a profit center for the FCC where you would pay to play.� >>>> � >>>> That is not to say it was not an obvious solution that was undoubtedly >>>> thought of by many people at the same time.� >>>> � >>>> From: Josh Reynolds <mailto:[email protected]> >>>> Sent: Sunday, February 21, 2016 9:00 PM >>>> To: <mailto:[email protected]>[email protected] <mailto:[email protected]> >>>> Subject: Re: [AFMUG] TVWS >>>> � >>>> There was just an email about this a few weeks ago. >>>> >>>> Consider it dead, it might as well be. All the gear is alpha crap with >>>> very low bandwidth and extremely high cost for the capabilities. >>>> >>>> I believe the location database was never created either, but I'm not sure. >>>> >>>> On Feb 21, 2016 8:32 PM, "John Woodfield" < >>>> <mailto:[email protected]>[email protected] >>>> <mailto:[email protected]>> wrote: >>>> Is it dead? Anyone deploying it? Anyone besides Carson selling it? >>>> � >>>> � >>>> � >>>> John Woodfield, President >>>> Delmarva WiFi Inc. >>>> 410-870-WiFi >>> >> >
