[digitalradio] tuning of SDR radio

Hi gang. I found a great idea for tuning of SDR radio using a cheap mouse and rotary encoder on www.cq.sk http://www.cq.sk/img/sdr_rotacny_enkoder.jpg Just buy a cheap mouse (Genius NetScroll 1200 on picture) and replace the whell optical encoder with a panel mount rotary encoder with knob. It

[digitalradio] ANNOUNCE: PocketDigi 1.0.12 released

Hi gang. After nearly two years I finally found time to release an update on PocketDigi. The biggest new feature is DXCC lookup function and distance / bearing calculation. DXCC database from DXLab Suite was converted into a highly compact form and packed into the PocketDigi binary to simplify

[digitalradio] ANNOUNCE: PocketDigi 1.0.11 released

Hi gang. I released PocketDigi 1.0.11 at http://pocketdigi.sourceforge.net. There are following new features implemented: RSID, PSK63F, PSK125, sampling rate conversion, tx delay/tx tail/ats3 preamble/postamble settings, keyboard accelerators, Handheld PC 2000 improvements, Waterfall FFT

[digitalradio] Re: digital voice within 100 Hz bandwidth

Hi Mike. I studied some aspects of voice recognition about 10 years ago when I thought of joining a research group at Czech Technical University in Prague. I have a 260 pages text book on my book shelf on voice recognition. Voice signal has high redundancy if compared to a text transcription.

[digitalradio] Digital ATS3 - MFSK modes implemented

Digital ATS3 - MFSK modes implemented Hi gang. I implemented MFSK remote modulation into ATS-3a firmware. I also extended PocketDigi to make use of it. The little transceiver in Altoids tin is now able to send a lot of digital modes if commanded by PocketDigi, namely: CW, BPSK31, BPSK63,

[digitalradio] Announce: PocketDigi 1.0.9

Hi gang. I put a new release of PocketDigi on Source Forge. I set the version number to 1.0.9, because I sent away lot of 1.0.8-pre already. I was quite busy the last couple of months by making ATS-3a transceiver talk digitally, which is the reason I did not release updates of PocketDigi since

Re: [digitalradio] Portable PSK operating

Hi Mel. Knowing absolutely nothing about the activity, could someone who operates portable PSK tell me what specification is required in a pocket PC to transmit PSK ? Normally of course I would be communicating from the shack. PocketDigi works on Pocket PC devices with Pocket PC 2002 and

Re: [digitalradio] Don't hear much clamor about, Chirp, DominoEx, MFSK16 anymore!

Try gmfsk or the new cousin fldig if you want a free multi-mode digital program that does CW. Or you coud use PocketDigi built for desktop windows. It is actually a port of gMFSK to Pocket PC and desktop windows. http://pocketdigi.sourceforge.net 73,Vojtech OK1IAK Need a Digital mode QSO?

Re: [digitalradio] digital modes and THE RADIO

Hi gang. The whole group delay fuss is pointless in my opinion because of the constraints that are put on the operating modes by our lovely ionosphere. I do not think that group delay is an issue at 100Bd symbol speed. The flattness of the passband is more an issue but it is something that the

Re: [digitalradio] Re: ARQ sound card modes

WHAT WE KNOW AT THIS MOMENT: A computer will not work for a fast ARQ mode because every time it does anything else that timing link is lost. Not true. The question is what you mean with speed. If it is an average data transfer speed, than it is certainly possible to write a very high speed