This is a good point. Using some intelligence after the ADC stage (uP or the DSP itself) and a "control channel" (possibly two way) embedded in the sample stream transport, values like Gain-Level can be transmitted/controlled to/from the PC or other controlling unit. I'm actually planning to build some evoluted SDR RTX to be placed near the remote antenna and to be radiocontrolled by a PC in the shack.
It is nice (and useful) to see rain-flow charts if using a SDR in the HF bands but there are also other practical applications for normal VHF/UHF/SHF traffic that are waiting for this kind of radios. In this cases a PC placed under the antenna isn't properly a sensible solution, so DSP and sporadic digital radio-communication with a PC (or palmtop) for servicing is of interest too. Such an application involves different requirements for the AGC function. Here, again, a Software Defined AGC function specially tailored for this bands/services is interesting. So, simply, a change in the DSP software will make the job. ;-) vy73s de ik2wqi - Andreas KD5NWA wrote: > I prefer the idea of programmed gain steps, so you know exactly what > the system gain is at all times therefore you will be able to have > your signal displays be accurate. With traditional AGC you have no > clue what the system gain is therefore what amplitude signals you are > listening to. > ------------------------ Yahoo! Groups Sponsor --------------------~--> See what's inside the new Yahoo! Groups email. http://us.click.yahoo.com/2pRQfA/bOaOAA/yQLSAA/ELTolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
