Re: [bpsk31] Abridged summary of bpsk31@googlegroups.com - 1 update in 1 topic

[Hal Muir Ruttinger]

The scale above the waterfall is a kilohertz scale relative to your tuner frequency

The waterfall graphic is a picture of your pass band which your software driven radio is looking at all of the time.  The computer software is merely reflecting the range of the radio's pass band in a graphic to give the illusion that you can click anywhere on the waterfall and some how improve the possibility of receiving that stations transmission.  In digital modes the software is deciphering the whole pass band regardless of where you click the graphic pointer on your computer screens waterfall.

The reason that I mention all of this is because most people don't understand how the newer software defined radios work.  We get confused because most are thinking of how it works using audio voice modes.  Yes when you are transmitting audio it is important for your tuner frequency to be exactly coordinated with the other station that you are doing an audio QSO with in simplex operation.

Digital modes are deciphering any digital transmissions within the 3000 to 6000 kilohertz passband that your radio is looking at all at the same time digitally! The digital processing happens very fast and runs at a rate in the megaherts per second processing time to accomodate the size of the whole passband.

I hope that this answers the original question! ( and that it further confuses those that have no idea what I am talking about!)

 

On Thu, Feb 23, 2023 at 11:06 PM <bps...@googlegroups.com> wrote:

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• numbers on top of the waterfall display - 1 Update

numbers on top of the waterfall display

Bob May <robm...@gmail.com>: Feb 23 06:25PM -0800 I almost hate to ask this question but here goes: what does the graded scale (0 to 5500) on top of the waterfall represent? Is it a scale in Hz relative to the base RF frequency? Is it audio ...more

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[Bob May]

OK. That I can get my head around -  the scale above the waterfall is a kilohertz scale relative to my tuner frequency and the waterfall graphic is a picture of my pass band. Thank you!