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[Sean Chen]

Looking at pre-set channels on my UHF-R J5 frequency list, none shows up in the guard band of 612 MHz to 614 MHz. My question is, is manual tuning the only way to get into guard band on UHF-R J5 system? Thanks for your helps!

[Henry Cohen]

Looking at pre-set channels on my UHF-R J5 frequency list, none shows up in the guard band of 612 MHz to 614 MHz. My question is, is manual tuning the only way to get into guard band on UHF-R J5 system? Thanks for your helps!

In the US, 612-614 is not a guard band, rather it's part of what's still called "channel 37" (608-614 MHz). It's only for radio astronomy, wireless medical telemetry and now white space devices (WSD). Wireless mics/coms/IEMs/IFBs are not permitted to operate there.

[Sean Chen]

In the US, 612-614 is not a guard band, rather it's part of what's still called "channel 37" (608-614 MHz). It's only for radio astronomy, wireless medical telemetry and now white space devices (WSD). Wireless mics/coms/IEMs/IFBs are not permitted to operate there.

Thanks for the heads up. So is the FCC verbiage below no longer applicable?

"...and unlicensed wireless microphones may operate on a portion of the 600 MHz guard band (614-616 MHz) or a portion of the 600 MHz duplex gap (657-663 MHz)."

https://www.fcc.gov/general/wireless-microphones-0

[Mac Kerr]

Thanks for the heads up. So is the FCC verbiage below no longer applicable?

"...and unlicensed wireless microphones may operate on a portion of the 600 MHz guard band (614-616 MHz) or a portion of the 600 MHz duplex gap (657-663 MHz)."

https://www.fcc.gov/general/wireless-microphones-0

Just to state the obvious, the frequencies you asked about are not in that range.

Mac

[Sean Chen]

Just to state the obvious, the frequencies you asked about are not in that range.

Mac

Thanks for your correction. My mistake.  614 MHz to 616 MHz is in some J5 band preset.

[Henry Cohen]

Thanks for the heads up. So is the FCC verbiage below no longer applicable?

"...and unlicensed wireless microphones may operate on a portion of the 600 MHz guard band (614-616 MHz) or a portion of the 600 MHz duplex gap (657-663 MHz)."

As Mac, said, different frequency range. The FCC's verbiage from their April 2017 public notice stands and has to do with the 2MHz above 37, as well as the 6MHz unlicensed band in the duplex gap.

Do note that any equipment that can tune to the auctioned spectrum and/or operate at an RF power greater than 20mW will lose it's certification at the conclusion of the transition period on July 13, 2020. So just because you would only operate on the appropriate frequencies at or below 20mW, you'd still be in violation of FCC rules due to operating non-certified equipment.

[Sean Chen]

Thanks again for your help.

[brian maddox]

...

Do note that any equipment that can tune to the auctioned spectrum and/or operate at an RF power greater than 20mW will lose it's certification at the conclusion of the transition period on July 13, 2020. So just because you would only operate on the appropriate frequencies at or below 20mW, you'd still be in violation of FCC rules due to operating non-certified equipment.

Apologies for slight swerve....

Was this also true for the last auction when the 700 band was sold off?  It's an academic point.  I'm just curious.

[Mac Kerr]

Apologies for slight swerve....

Was this also true for the last auction when the 700 band was sold off?  It's an academic point.  I'm just curious.

Yes.

Mac

[Sean Chen]

Hello, academically, would the new Axient Digital transmitter in band G57 sold in US, if capable of transmitting in the guard band of 614-616 MHz in up to 35 mW, require limiting to 10 mW mode going forward?

This is the latest FCC clarification I can find:

https://transition.fcc.gov/oet/ea/presentations/files/nov17/61-Wireless-Microphone-Rules-DT.pdf

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