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Author Topic: RF Interference at Stadium  (Read 1707 times)

Pasi Manninen

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Re: RF Interference at Stadium
« Reply #20 on: September 21, 2019, 03:37:35 pm »

In addition to Henry's excellent collection of links, you can find more real world scan data from the website https://taajuus.info/

Nearest location with quite recent scan would be from Dos Equis Pavilion scanned by mr C, 2019-08-25, you can find the scan from the following link
https://taajuus.info/scan-database/ViewScan/279

Scan files can be downloaded as .csv files which could be imported in frequency coordination software such as  Shure Wireless Workbench, Sennheiser Wireless Systems Manager or Intermodulation Analysis System (IAS) by Professional Wireless Systems.

A fresh scan from  the actual location would always be most valuable!
Hopefully the available online data can help you to find some free spectrum for your wireless mics.


Currently, the best FCC database to use for determining occupied channels is the Licensing and Management System. Data is presented in a different format than the TV Query database, but it is mostly up to date.

By far the best TV database tool set available right now is rabbitears.info which draws on all the FCC databases and provides a wealth of repack and phase transition information.

However, nothing beats an actual RF scan of the target location at the time of deployment. Barring a real time scan, one that is somewhat recent, and not prior to a transition phase end date is the next best thing. There are a couple of very good scan repositories available:

- Peter Erskine's bestaudio.com (registration is required, but only to keep out the riff-raff, there is no tracking or advertising, well no tracking Pete's aware of . . .)

- Gotham Sound

- For Manhattan, NY, by far the best resource is rfcoordinationnyc.com. Pauls' scans are immediately post each phase deadline (his last scans are August 1) and are in the general areas of the primary TX points in Manhattan.

As it concerns whitespace databases, Nominet is another currently active database in which Part 74 licensees can ostensibly register for protection. There is no confirmation of registration and very little additional information. It does not inspire confidence.
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https://taajuus.info -  Frequency scan database for wireless professionals

Caleb Dueck

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Re: RF Interference at Stadium
« Reply #21 on: September 22, 2019, 06:37:01 pm »

True dat!  And probably more important with every day into the future. Life is gonna get tough in the very near future for those that can’t get a good co-ordination.

What are the odds of large venues installing a basic analyzer and Domotz, so anyone who requests can get a current scan of that venue? 
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Jason Glass

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Re: RF Interference at Stadium
« Reply #22 on: September 22, 2019, 08:04:58 pm »

What are the odds of large venues installing a basic analyzer and Domotz, so anyone who requests can get a current scan of that venue?

https://www.rfvenue.com/wavetower

Henry Cohen

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Re: RF Interference at Stadium
« Reply #23 on: September 22, 2019, 08:48:53 pm »

What are the odds of large venues installing a basic analyzer and Domotz, so anyone who requests can get a current scan of that venue?

The issue is who's going to pay for and maintain the equipment and service. Few venues have any incentive to do so.
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John Sulek

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Re: RF Interference at Stadium
« Reply #24 on: September 24, 2019, 02:30:24 pm »

What are the odds of large venues installing a basic analyzer and Domotz, so anyone who requests can get a current scan of that venue?

About the same odds as getting an up to date list of the venue freqs. ;)
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Don Boomer

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Re: RF Interference at Stadium
« Reply #25 on: September 24, 2019, 07:27:31 pm »

What are the odds of large venues installing a basic analyzer and Domotz, so anyone who requests can get a current scan of that venue?

We sell a scanner - RF Venue Wavetower that reports to a cloud. It’s just requires conventional internet access so you can read it in a web app. Nothing to buy for third parties to read it provided the owner set it to “public”.

Everyone is invited to https://www.rfvenue.com/wavetower. You can sign up for a free account that allows you to read in near real time any of the multitudes of public towers all around the world.
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brian maddox

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Re: RF Interference at Stadium
« Reply #26 on: September 25, 2019, 04:02:28 pm »

We sell a scanner - RF Venue Wavetower that reports to a cloud. It’s just requires conventional internet access so you can read it in a web app. Nothing to buy for third parties to read it provided the owner set it to “public”.

Everyone is invited to https://www.rfvenue.com/wavetower. You can sign up for a free account that allows you to read in near real time any of the multitudes of public towers all around the world.

Very clever repurposing of the RF Explorer "Chip" [i'm guessing] combined with GPS and remote access.  I like it.

Now to just get about 500 of these deployed in every major venue in the world.  Then start working on the minor ones....
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John Sulek

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Re: RF Interference at Stadium
« Reply #27 on: September 26, 2019, 01:09:26 am »

Very clever repurposing of the RF Explorer "Chip" [i'm guessing] combined with GPS and remote access.  I like it.

Now to just get about 500 of these deployed in every major venue in the world.  Then start working on the minor ones....

I think Jason already tried a version of this with a rack mounted industrial pc, signal hound and an internet connection on tour with artists.
I agree that a wavetower in major venues would be great...but I'm not holding my breath. Hard enough to get seating charts and trash cans.
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Ike Zimbel

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Re: RF Interference at Stadium
« Reply #28 on: September 30, 2019, 12:13:17 pm »

I think Jason already tried a version of this with a rack mounted industrial pc, signal hound and an internet connection on tour with artists.
I agree that a wavetower in major venues would be great...but I'm not holding my breath. Hard enough to get seating charts and trash cans.
+1 on the trash cans! Last tour, I had my own waste basket, and it was a cherished possession.
Meanwhile back on topic...I agree that having a remote scanning device, like Wavetower in venues would be great, but I always have huge questions about where such a device would be placed. For example, if one was placed anywhere near the window in the audio booth at our local arena, it would be sitting on top of their TX antenna for IEM's and IFB's. Or, because it relies on an internet connection and is easily stolen, does it end up in a "secure place" like an IT rack room, or a desk in the IT department? I would worry about placement even if I was FedEx'ing a unit to someone at a venue for an advance scan.
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Don Boomer

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Re: RF Interference at Stadium
« Reply #29 on: September 30, 2019, 12:32:51 pm »

Or, because it relies on an internet connection and is easily stolen, does it end up in a "secure place" like an IT rack room, or a desk in the IT department? I would worry about placement even if I was FedEx'ing a unit to someone at a venue for an advance scan.

Simple.  Just order the model that comes with an armed security guard :)
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Don Boomer
Senior applications engineer
RF Venue, Inc.

ProSoundWeb Community

Re: RF Interference at Stadium
« Reply #29 on: September 30, 2019, 12:32:51 pm »


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