Xts3k Encryption module qtn

cbus · Post by **cbus** » Mon Nov 21, 2005 2:15 pm

Guys, anybody know what the module NTN8250G is ?

Thanks

Fuel4300 · Post by **Fuel4300** » Tue Nov 22, 2005 10:24 am

MOL says its a vocoder board but thats all. I would have to dig out the service manuals to tell what radio - I will when I get home later if some one hasnt come up with a better answer.

Mike

cbus · Post by **cbus** » Wed Nov 23, 2005 1:28 am

Fuel4300 wrote:MOL says its a vocoder board but thats all. I would have to dig out the service manuals to tell what radio - I will when I get home later if some one hasnt come up with a better answer.

Mike

thanks Mike

Zap · Post by **Zap** » Thu Nov 24, 2005 6:23 pm

Here are the IC's on the VOCODER board:

U401~U403 ___32Kx8 DSP s-ram
U404_________256Kx8 FLASH ROM
U405_________DSP (digital signal processor)
U406_________ADSIC (ABACUS/DSP support IC)

It appears in the XTS3000 service pdf, includes schematic and PC board image.

... but what does it do...

IMBE?

The Pager Geek · Post by **The Pager Geek** » Thu Nov 24, 2005 7:35 pm

The vocoder does all the audio processing (DSP, IMBE, etc.)

The controller is the human interface (channels, audio amp, volume, buttons, etc)

tpg