[BC] Accurian Insides

[Ron Cole]

This is what you would expect in a modern designed radio.

Mine has a problem from time to time with the local AM station in that it
will start a loop playback or audio hickup.
Once that starts you have to power cycle the radio to get it to run again.

Ron

On 12/2/06, stanleybadams <stanleybadams at yahoo.com> wrote:
>
> I was tooling around the internet looking for reviews and information on
> the
> Accurian, as I received mine this week but have not turned it on yet.
> Here is what someone posted on a web site  (www.avs.forum.com)  by the
> name
> of Eric.  So I am giving credit where credit is due
>
> I finally had the courage to open up the radio and look inside (Hint: some
> screws are hidden under the speaker grilles).
>
> There is a Samsung module that plugs into a PCB named "Table-Top Version
> 2.2". The Main PCB contains the Power Supply, Amplifier, and connectors
> for
> the display, speakers, keypad, etc. The Samsung HDRMDVM0101 module
> contains
> the heart of the radio. The module has a 20 pin and a 50 pin connector to
> interface to the Main PCB. The module also has a JTAG connector for the
> ATMEL Processor.
>
> ICs on the module include:
> ATMEL Mega128L Low Power AVR RISC Processor with 128K Flash
> TI TMS320DRI350AZTS5 DSP for HD Radio Baseband and Analog Decoding
> TI DRI8201 Intergrated AFE
> Spansion S29GL032M90TFIR4 3.3V 32Mb Flash x8/x16 Bottom Boot Sector
> ESMT M12L128324A 3.3V 4MBx32 SDRam
> 1803A 24bit 96K Stereo Audio ADC
> 1782 24bit 96K Stereo Audio DAC
> LM833 Dual Op Amp
>
> This is a Software Defined Radio where the AM or FM signal is converted to
> a
> 10.7 MHz IF and then digitized. The digitized IF gets downconverted and
> fed
> to the DSP where either AM, FM or HD signals are decoded and sent to the
> Stereo Audio DAC. It appears even the Aux Input is digitized.
>
> Several companies offer modules based on the HD reference design so I
> would
> not be surprised if most HD radios use the same scheme. Plug a module into
> a
> I/O board and put a custom user interface/configuration in flash.
>
>
> Obviously, the speakers can be replaced or the audio fed into a stereo
> system, but as you see they are modules such as this Samsung, or what TI
> or
> others would build.  It is a single unit radio that has the real guts in
> the
> decoders, not in the RF section.  Somebody ought to build a good American
> made copy of this thing, don't you think?
>
>
> Stanley Adams
> Memphis
>
>
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