MIC

[max232]

I am too much interessé by the NUMERIC(DIGITAL) COMMUNICATION, for it I want to realiser a systeme of transmission, It(he) consists transported of the word (for a téléfonique band(strip) (300 - 3.400 hz) on a pair of threads bifilaire ,For it I owes echanttilonné, quantified, and coded in HDB3 this signal attacks(affects) a pair of modem 64kb / @ Then being reconstituted my indicates of origin of the other one quoted(esteemed). Highly-rated modulation in theory I have not of probleme the choice of the orloge of echittilonage (fe=8 khz), but the hard ,adaptation of my signial with modems the probleme which this(they) pose(installation).

 

[ve7brz]

Hi max232,

Your query is difficult to understand, but I'll translate as much of it as I can for others:

"I'm very interested in digital communication. I wish to design a system to transmit voice (300 - 3400 Hz) digitally via a twisted pair (read telephone or equivalent). I want intonation(?) quantified and coded re: HD3B(?). A pair of 64 K(baud) modems are to be used. I want an accurate reproduction upon decoding. High frequency modulation is not a problem (in theory), the choice of ????????? (8kHz), but interfacing this to the modems is my problem.

I realize it's a poor translation but I hope it helps. Perhaps you could explain further the missed (????????) portion.

 

[max232]

thank you ve7brz , this is traduction frensh to english

 

[Lewish]

The only problem I see, is that you aren't going to be able to do 8K sample rate. By the time you allow for start and stop bits, and doing 8 bit A/D at most you can get about 5.5K sample rate. So, your voice band is at most going to be half of that. That may be good enough, as that will cover most of the frequencies of the human voice.