[hpsdr] QEX covers

[John Laur]

This is an often repeated story, but is true in as much as any single chip
FM transceiver is using "SDR Technology" internally which is to say there
are necessarily some elements that must be done using similar processes to
be miniaturized like that. But there is no way to interface with it to
obtain digitized quadrature data at baseband if that's what you are after.

The Baofeng radios which I have disassembled use the RDA1846 which says it
has a DSP in it (and RDA5802 for WFM receive).

73, John KF5SAB


On Thu, May 1, 2014 at 12:54 PM, <mstangelo at comcast.net> wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Don't those cheap Chinese VHF/UHF handi-talkies use SDR technology?
>
> Does anyone know the chipset?
>
> Mike N2MS
> ----- Original Message -----
> From: lstoskopf at cox.net
> To: hpsdr at openhpsdr.org
> Sent: Thu, 01 May 2014 04:16:32 -0000 (UTC)
> Subject: [hpsdr] QEX covers
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Congrats.  Kind of sad though.  Below is an article on how to measure
> crystals.  Over the years I gathered boxes of crystals, measured bunches
> and made filters.  Now the fast A/D chips have nearly made that technology
> an historical footnote. Soon VHF transverters also.   N0UU
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