Inductive RFID transmit spectrum

[George Lemaster]

Some clues may be found in the documentation for
Texas Instruments Series 2000 LF RFID at:
http://www.ti.com/tiris/docs/manuals/s2000.htm

Some transmission format detail begins on page 24 of "Description of
....Transponders" :
http://www.ti.com/tiris/docs/manuals/refManuals/mpt-tsp.pdf
Also 'Reader System' appendix C, beginning on page 66 (field strength
limits):
http://www.ti.com/tiris/docs/manuals/rfm01-98.pdf
73
George
WB5OYP

----- Original Message -----
From: Andre Kesteloot <andre.kesteloot@ieee.org>
To: lf-amrad <lf@amrad.org>; AMRAD Tacos <tacos@amrad.org>
Sent: Wednesday, January 09, 2002 9:55 PM
Subject: Inductive RFID transmit spectrum]


> John W Gould wrote:
>
> > Inductive RFIDs that operate at 134.8kHz pose a possible treat in the
future
> > to the noise floor in the 136kHz amateur band.  A paper is currently
being
> > considered internationally that would allow an increase in the
modulation
> > sidebands, falling in the 136kHz band and elsewhere, from the RFID
system.
> >
> > One item of detail omitted from the papers that are being reviewed is a
> > precise specification of the transmit spectrum from the RFID "readers"
as
> > the interrogators are termed.   It is assumed that it is a flat spectrum
> > with constant spectral density.
> >
> > Grateful if anyone can provide me with more detail of the system's
> > modulation scheme / transmit spectrum.
> >
> > 73  John, G3WKL
> > RSGB HF Committee
> > g3wkl@btinternet.com
>
>
>
>
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