Ed,
Understood, and thank you. The metodology is not my question, though.
I still ask: what was the lowest frequency swept? I infer from the tiny graph
it was around 300 khz, but did not catch any numerical data at that point or
outside of the points you mention.
I ask b/c as a city manager we adopted an ordinance regulating marijauna grow
operations and included a provision of local license approval based upon also
meeting FCC regulations regarding RFI emissions. We recommend an outboard
filter for noisy ballasts, but I would like to also be able to make a
recommendation for an effective and clean ballast from LF to VHF.
Is this the one?
Scott
Scott
Sent via the Samsung Galaxy Note® II, an AT&T 4G LTE smartphone
<div>-------- Original message --------</div><div>From: "Hare, Ed W1RFI"
<w1rfi@arrl.org> </div><div>Date:12/01/2016 4:14 PM (GMT-05:00)
</div><div>To: nm8rmedic <nm8rmedic@rocketmail.com>, Tom Thompson
<w0ivj@tomthompson.com> </div><div>Subject: RE: [RFI] Grow light RFI </div><div>
</div>It looks like they swept the entire frequency range with a spectrum
analyzer in peak-detection mode, obtained the 6 highest values and frequency,
then went back and measured just those frequencies in quasi peak detector mode.
This is a common test practice.
Ed, W1RFI
-----Original Message-----
From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of nm8rmedic via RFI
Sent: Thursday, December 01, 2016 4:09 PM
To: Tom Thompson; rfi@contesting.com
Subject: Re: [RFI] Grow light RFI
Tom,
It looks like there were three test runs conducted. The tabular data shows the
lowest frequency tested was 14 megahertz, in runs 1 and 2. The graphic data
results show lower frequencies though. Can you verify the lowest frequency at
which these were tested? Scott
Sent via the Samsung Galaxy Note® II, an AT&T 4G LTE smartphone
<div>-------- Original message --------</div><div>From: Tom Thompson
<w0ivj@tomthompson.com> </div><div>Date:12/01/2016 1:32 PM (GMT-05:00)
</div><div>To: Roger D Johnson <n1rj@roadrunner.com>, RFI <rfi@contesting.com>
</div><div>Subject: Re: [RFI] Grow light RFI </div><div> </div>Roger,
Here is an independent lab evaluation of a Galaxy ballast the may be a good bet.
http://tomthompson.com/radio/GrowLight/RFI_Tests_Galaxy_902220_FCC-Report.pdf
Tom W0IVJ
On 12/1/2016 11:27 AM, Roger D Johnson wrote:
> Is there a list of ballasts that Don't cause RFI?
>
> 73, Roger
>
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