Batboard

Hmm... I wonder.

Now, I'll preface this with I have not powered up this radio yet...

I am pretty sure that i'm going to be stuck with analog only firmware, until, I popped the hood (of course checking to see if they were kind enough to leave a DES module intact - which they weren't ) that there was an interesting sticker in there that I had never seen before:

"Contains Technology Patented by Digital Voice Systems Inc."

Now, I know that DVSI is responsible for the IMBE codec (I am pretty sure at least) and that this is probably their representation that this radio contains IMBE?

The flash is a very basic one... 0000010020005, which translates to:

H35/G48 Conventional Operation
Q241 ASTRO Ready (Analog Operation ONLY)

Usually, this means that you won't get IMBE out of it without a flash, but I would have assumed that it wouldn't contain any of the code required to actually perform IMBE encoding/decoding - until I saw the sticker inside.

Thoughts?

Again, I haven't powered it up yet... Just mostly curious why the sticker would be there, if, in theory it didn't contain the code.

-Alex

even in analog only radios, all modulation is processed by the DSP onboard the vocon.

even w/o an IMBE flash, you still have an A->D and D->A conversion going on.

that's why there is a sticker there....

of course, it could be that they ALWAYS put the sticker there.... LOL

doug

batdude wrote:even in analog only radios, all modulation is processed by the DSP onboard the vocon.

even w/o an IMBE flash, you still have an A->D and D->A conversion going on.

that's why there is a sticker there....

of course, it could be that they ALWAYS put the sticker there.... LOL

doug

Sure.

But I wasn't sure if the A/D D/A conversion was something written by M and then just "grabbed" the codec if it detected it needed to process the audio, or the whole A/D D/A process was developed by DVSI.

If it were me developing the radio, I would probably write something that would do the A/D, D/A conversion, and then have the acutal decode/encode of the data done through a function (a.k.a. IMBE)

Just my thoughts.

-Alex

Then entire A/D conversions was done by DVSI. Based on the firmware in the DSP, it will tell you what operation (if any) it's coded for. (Firmware breakdowns in other threads)

The Host and DSP revisions are seperate (yet equal.)
IE:
Hosts:
11.22.01
11.22.02
11.22.03
11.23.00

all have DSP 8.03.02.

The Host is M produced.

tpg

The Pager Geek wrote:Then entire A/D conversions was done by DVSI. Based on the firmware in the DSP, it will tell you what operation (if any) it's coded for. (Firmware breakdowns in other threads)

The Host and DSP revisions are seperate (yet equal.)
IE:
Hosts:
11.22.01
11.22.02
11.22.03
11.23.00

all have DSP 8.03.02.

The Host is M produced.

tpg

Well there ya go...

We'll see what happens when it powers up...

I was curious to know if it was a M developed process, with DVSI just doing the codec, but apparently that's not the case...

Cool.

-Alex

I noticed the same sticker in my astro II vhf when I had it open a cuple of weeks ago. I haven't owned enough of these to know whether that was something they slapped in all of them or not.

mancow

DVSI only provides the IMBE software. The A/D hardware, DSP analog software or DSP 12kb software are done by Motorola. The sticker is required on radios than contain the IMBE code as part of the DVSI licensing terms. The "astro ready" radios include the IMBE DSP software in the radio even though it isn't enabled for use by the flash code.