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Author Topic: Shure Axient Digital X55 Band [941MHz-960MHz]  (Read 1783 times)

Henry Cohen

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Re: Shure Axient Digital X55 Band [941MHz-960MHz]
« Reply #10 on: November 27, 2019, 09:16:05 am »

Including if I recall quite a bit of medical telemetry gear operates in that region.  You could wipe out a nearby hospital wireless cardiac monitors.

Nope. Wireless Medical Telemetry bands are 608-614 MHz (TV ch 37), 1395-1400 MHz and 1427-1432 MHz.
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Henry Cohen

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Scott Helmke

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Re: Shure Axient Digital X55 Band [941MHz-960MHz]
« Reply #11 on: November 27, 2019, 10:02:50 am »

You MUST, absolutely MUST, do an FCC ULS geographic search for your operating location and frequency range (I suggest a 5 mile radius and examine each licensee's map for TX vs. RX stations.  Avoid all RX within 5 mi and all freqs with P2P paths crossing within 1 mi of your location), and calculate your freqs to avoid each primary licensee's carriers, with appropriate channel freq spacings per emission designator.

Then you MUST, absolutely MUST contact the local SBE freq coordinator and request coordination approval for your freqs.  I suggest 1 week in advance.  Then, when you get on site, do a scan and add any newly found carriers to your coordination math, then do it all again and beg "Mia culpa" if you require an amended coord request.

Jason, could you expand on those two items a little, maybe a link or just spell out the acronyms?

I do get the occasional X band request, generally from somebody who is a TV broadcaster and presumably has a part 74 license, but the coordination is done by me for a local Big 10 school.
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Henry Cohen

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Re: Shure Axient Digital X55 Band [941MHz-960MHz]
« Reply #12 on: November 27, 2019, 10:41:02 am »

Jason, could you expand on those two items a little, maybe a link or just spell out the acronyms?

ULS = FCC's Universal Licensing System

SBE = Society of Broadcast Engineers, more specifically, the local SBE coordinators


Quote
I do get the occasional X band request, generally from somebody who is a TV broadcaster and presumably has a part 74 license, but the coordination is done by me for a local Big 10 school.

The broadcaster may or may not be licensed for 941-960 (or the previous 944-952 MHz). The other important question is, does TC have an STL license? (No, according to the ULS, unless it's under another name.) If you're not following Jason's description of the rules, the consequences, legal and operational, could be significant.
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Henry Cohen

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Jason Glass

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Re: Shure Axient Digital X55 Band [941MHz-960MHz]
« Reply #13 on: November 27, 2019, 11:54:53 am »

ULS = FCC's Universal Licensing System

SBE = Society of Broadcast Engineers, more specifically, the local SBE coordinators


The broadcaster may or may not be licensed for 941-960 (or the previous 944-952 MHz). The other important question is, does TC have an STL license? (No, according to the ULS, unless it's under another name.) If you're not following Jason's description of the rules, the consequences, legal and operational, could be significant.

There's a loophole in the rules that allows Part 74 licensees to operate in any legal Part 74 band, even those not specified in the license, for up to *I think* 720 hours per year.

Henry Cohen

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Re: Shure Axient Digital X55 Band [941MHz-960MHz]
« Reply #14 on: November 27, 2019, 12:15:42 pm »

There's a loophole in the rules that allows Part 74 licensees to operate in any legal Part 74 band, even those not specified in the license, for up to *I think* 720 hours per year.

Not a loophole; an explicitly stated rule. 47CFR Part 74.24 permits licensed Part 73 broadcasters to operate up to 720 hours/year/frequency on any subpart D, E, F and H bands/services. So yes, the broadcast customer could operate legally, given the appropriate coordination with the local SBE, but the rental house can not [without the appropriate Part 74 license].
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Henry Cohen

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Scott Helmke

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Re: Shure Axient Digital X55 Band [941MHz-960MHz]
« Reply #15 on: December 12, 2019, 12:59:10 pm »

I've been doing some research on this, and getting into contact with my local SBE coordinator as suggested.

I've actually not been able to find anything about this STL band on the ULS, though, unless it's hiding under another category.
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Jason Glass

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Re: Shure Axient Digital X55 Band [941MHz-960MHz]
« Reply #16 on: December 12, 2019, 03:46:50 pm »

I've been doing some research on this, and getting into contact with my local SBE coordinator as suggested.

I've actually not been able to find anything about this STL band on the ULS, though, unless it's hiding under another category.

I've found that a ULS geographic "all services" search based on a radius from coordinates, within a frequency range, returns all TX and RX stations within that radius.  Examination of each station's license reveals the rest of the necessary details to determine which freqs to avoid and how wide their occupied BW's are.

Also, use Google Earth and download this KMZ file to get lots of good info about RF operations in a given geography, including STL paths.  This resource is pure gold for RF work.  https://www.fccinfo.com/fccinfo_google_earth.php

Scott Helmke

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Re: Shure Axient Digital X55 Band [941MHz-960MHz]
« Reply #17 on: December 13, 2019, 10:19:39 am »

Also, use Google Earth and download this KMZ file to get lots of good info about RF operations in a given geography, including STL paths.  This resource is pure gold for RF work.  https://www.fccinfo.com/fccinfo_google_earth.php

Wow!
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Ike Zimbel

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Re: Shure Axient Digital X55 Band [941MHz-960MHz]
« Reply #18 on: December 13, 2019, 12:11:36 pm »

I've found that a ULS geographic "all services" search based on a radius from coordinates, within a frequency range, returns all TX and RX stations within that radius.  Examination of each station's license reveals the rest of the necessary details to determine which freqs to avoid and how wide their occupied BW's are.

Also, use Google Earth and download this KMZ file to get lots of good info about RF operations in a given geography, including STL paths.  This resource is pure gold for RF work.  https://www.fccinfo.com/fccinfo_google_earth.php
Thanks, Jason, for another invaluable contribution to our field!
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~Ike Zimbel~
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John Sulek

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Re: Shure Axient Digital X55 Band [941MHz-960MHz]
« Reply #19 on: December 13, 2019, 12:54:23 pm »

I've found that a ULS geographic "all services" search based on a radius from coordinates, within a frequency range, returns all TX and RX stations within that radius.  Examination of each station's license reveals the rest of the necessary details to determine which freqs to avoid and how wide their occupied BW's are.

Also, use Google Earth and download this KMZ file to get lots of good info about RF operations in a given geography, including STL paths.  This resource is pure gold for RF work.  https://www.fccinfo.com/fccinfo_google_earth.php

Thanks!
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Re: Shure Axient Digital X55 Band [941MHz-960MHz]
« Reply #19 on: December 13, 2019, 12:54:23 pm »


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