From: Bill Owsley <00f5a03f18eb-dmarc-requ...@listserv.ieee.org>
Sent: Monday, March 24, 2025 12:49
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Tracking down interference at 915 MHz
Once to chase down interference signal, phone company pointed a very big finger
22, 2025 4:51 PM
*To:* EMC-PSTC@LISTSERV.IEEE.ORG
*Subject:* Re: [PSES] Tracking down interference at 915 MHz
Nice. Seems as if a simpler fix would be a set of directional antennas
for the gas station’s 915 MHz link, yielding higher intentional signal
and if the antennas are properly oriented
: Re: [PSES] Tracking down interference at 915 MHz
What really struck me was how busy the 915 MHz ISM band was utilized in an
urban environment! See Figure 5 in the article. This was a swept measurement in
Max Hold mode over a period of about a minute and you can see the average
signal
ood as neither given nor endorsed by it.
From: Brent DeWitt
Sent: Monday, March 24, 2025 1:54 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Tracking down interference at 915 MHz
Hi Ken. I guess I'm not terribly surprised, since this is a Region 2 ISM band
from 902-928 MHz. I am
: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Tracking down interference at 915 MHz
Nice. Seems as if a simpler fix would be a set of directional antennas for the
gas station’s 915 MHz link, yielding higher intentional signal and if the
antennas are properly oriented relative to the suspected
025 at 12:08 PM
*To:*
*Subject:*Re: [PSES] Tracking down interference at 915 MHz
I agree Ken. Unfortunately, installation companies don’t have that
degree of technical prowess or care, they just go in, do a job as
fast as possible, and move on. The owner of the gas station would be
oblivious to
] Tracking down interference at 915 MHz
The interference hunt was an interesting article.
The simple fix of using a set of directional antennas would work but is likely
to run afoul of the FCC Rules as using higher gain antennas are generally
prohibited unless they are Certified with the t
Enforcement Advisory
https://docs.fcc.gov/public/attachments/DA-19-90A1.pdf
Bob Sykes
Semi-Retired EMC Engineer
From: Ken Javor
Sent: Saturday, March 22, 2025 7:51 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [EXTERNAL] Re: [PSES] Tracking down interference at 915 MHz
Nice. Seems as if a simpler fix
-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Tracking down interference at 915 MHz
What really struck me was how busy the 915 MHz ISM band was utilized in an
urban environment! See Figure 5 in the article. This was a swept measurement in
Max Hold mode over a period of about a minute and you can see
: (256) 650-5261
From: Ralph McDiarmid mailto:rmm.priv...@gmail.com> >
Reply-To: * IEEE emc-pstc List * mailto:EMC-PSTC@listserv.ieee.org> >
Date: Sunday, March 23, 2025 at 12:08 PM
To: mailto:EMC-PSTC@LISTSERV.IEEE.ORG> >
Subject: Re: [PSES] Tracking down inter
>
> From: Ralph McDiarmid
> Reply-To: * IEEE emc-pstc List *
> Date: Sunday, March 23, 2025 at 12:08 PM
> To:
> Subject: Re: [PSES] Tracking down interference at 915 MHz
>
> I agree Ken. Unfortunately, installation companies don’t have that degree of
> technical
at 12:08 PM
To:
Subject: Re: [PSES] Tracking down interference at 915 MHz
I agree Ken. Unfortunately, installation companies don’t have that degree of
technical prowess or care, they just go in, do a job as fast as possible, and
move on. The owner of the gas station would be oblivious to
Nice. Seems as if a simpler fix would be a set of directional antennas for the
gas station’s 915 MHz link, yielding higher intentional signal and if the
antennas are properly oriented relative to the suspected interference source,
diminishing the interference level.
--
Ken Javor
Ph: (2
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