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Author Topic: How do you deal with illegal frequencies?  (Read 1584 times)

Henry Cohen

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Re: How do you deal with illegal frequencies?
« Reply #20 on: February 11, 2024, 02:44:19 PM »

I believe it's actually 653-663, and as Ike mentioned only part of that is legal for unlicensed users.

Only in the US. As I determined from my conversations with ISED, Canada permits unlicensed operations at 20mW throughout 652-653. (Ike?)
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Ike Zimbel

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Re: How do you deal with illegal frequencies?
« Reply #21 on: February 11, 2024, 05:35:18 PM »

Only in the US. As I determined from my conversations with ISED, Canada permits unlicensed operations at 20mW throughout 652-653. (Ike?)
Well, from my read of this link https://ised-isde.canada.ca/site/spectrum-management-telecommunications/en/learn-more/key-documents/consultations/decision-technical-and-policy-framework-white-space-devices ISED is still saying 652-663MHz. The difference being that in the US, the FCC has invoked a 1MHz guard band between the last downlink (Block G) and the Duplex Gap.
A few takeaways for the TLDR set:
1) The bulk of this document is still talking about white space devices, so they ain't gone away.
2) That the FCC and ISED have, in fact, come to different rulings about WSD use, with the FCC being more relaxed in allowing future WSD use in Ch-37 (608-614MHz), the Guard Band (614-616MHz), un-used portions of the downlink block (618-652MHz) and the upper 6MHz of the Duplex Gap (657-663MHz). ISED has said a solid "No" to any WSD use above 608MHz.
3)  The two regulatory bodies have inverted the Licensed/Un-Licensed chunk of the Duplex Gap between the two countries (see images).

From a practical standpoint, I try and leave some room between 652MHz and my first assigned frequency in the duplex gap, just because it's right up against an occupied cell block (you know, like in the prison movies...that's a bad thing! 8))...effectively I'm self imposing a guard band there.
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~Ike Zimbel~
Wireless frequency coordination specialist and educator.
Manufacturer's Representative (Canada)
Radio Active Designs
Pro Audio equipment repair and upgrades.
~416-720-0887~
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Ike Zimbel

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Re: How do you deal with illegal frequencies?
« Reply #22 on: February 11, 2024, 05:43:03 PM »

Well, from my read of this link https://ised-isde.canada.ca/site/spectrum-management-telecommunications/en/learn-more/key-documents/consultations/decision-technical-and-policy-framework-white-space-devices ISED is still saying 652-663MHz. The difference being that in the US, the FCC has invoked a 1MHz guard band between the last downlink (Block G) and the Duplex Gap.
A few takeaways for the TLDR set:
1) The bulk of this document is still talking about white space devices, so they ain't gone away.
2) That the FCC and ISED have, in fact, come to different rulings about WSD use, with the FCC being more relaxed in allowing future WSD use in Ch-37 (608-614MHz), the Guard Band (614-616MHz), un-used portions of the downlink block (618-652MHz) and the upper 6MHz of the Duplex Gap (657-663MHz). ISED has said a solid "No" to any WSD use above 608MHz.
3)  The two regulatory bodies have inverted the Licensed/Un-Licensed chunk of the Duplex Gap between the two countries (see images).

From a practical standpoint, I try and leave some room between 652MHz and my first assigned frequency in the duplex gap, just because it's right up against an occupied cell block (you know, like in the prison movies...that's a bad thing! 8))...effectively I'm self imposing a guard band there.
Here's the 2nd image...the two together were over 512kb.
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~Ike Zimbel~
Wireless frequency coordination specialist and educator.
Manufacturer's Representative (Canada)
Radio Active Designs
Pro Audio equipment repair and upgrades.
~416-720-0887~
ca.linkedin.com/pub/ike-zimbel/48/aa1/266

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Re: How do you deal with illegal frequencies?
« Reply #22 on: February 11, 2024, 05:43:03 PM »


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