[TangerineSDR] RFI and PSWS Magnetometer

Dave Larsen kv0s.dave at gmail.com
Thu Jun 3 10:52:29 EDT 2021


FYI  All of us that have been involved in the initial testing of the
Magnetometer boards are using cat6a shielded cables and  shield
connectors.  Dave Witten KD0EAG has created a draft install manual that is
being reviewed now and will be available on the tangerinesdr.com website
once the reviews are done.

Dave KV0S

On Thu, Jun 3, 2021 at 9:23 AM Ward Silver via TangerineSDR <
tangerinesdr at lists.tapr.org> wrote:

> (Changing the thread title to something more descriptive...)
> > Jonathan,
> > If necessary, we could probably reduce the i2c bus speed and still
> > easily meet the 1 per second magnetometer polling rate currently in use.
> > Jules-K2KGJ
> RFI from the digital data stream would be mostly generated by the edges of
> the I2C pulses and isn't really affected much by the bit rate.  The edges
> have to remain sharp, so not a lot of relief there.  I guess intermittent
> polling would result in bursts of RF which might be an improvement.
> I want to mention that we probably don't have a serious RFI.  As Bill
> noted, the receive antenna is quite close to the unit and it is not an
> enormous increase in the noise floor.
> At this point, having noted a potential issue, I think the focus should be
> on proper metallic enclosures and shielding, including cable connectors,
> along with careful connections between the chassis and enclosure, in the
> configuration we expect to actually be deployed.  Once that is available,
> more testing can be performed.
> 73, Ward N0AX
> --
> TangerineSDR mailing list
> TangerineSDR at lists.tapr.org
> http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org

KV0S - Dave Larsen
Columbia, MO, USA
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