If you receive a broadcast station it is very simple. The frequency, you can find in a list or other publication, is the fequency you tune to. AM, FM or SSB will work at once.
But if you try to receivee a utility station things become more difficult. For example a RTTY-WX-Station like DDH47. In the list you can find 147.3 Khz RTTY 50 Baud 85 Hz shift.
You will not receive this station when you tune to 147.3 Khz. That is because this Frequency is the center between Mark and Space. Here you have one tone at 147.2575 Khz and the other at 147,3425 Khz.
You can either use USB or LSB. All you can receive are sounds at 42.5 Hz. Most receivers do not work with tones at that low end of the filters.
DX-Buddy takes care of this. in the above case your RXCV will be tuned to 146.3 Khz and you now have the two frequencies at 957.5 Hz and 1042.5 hz. You will hear that loud and clear and your RTTY-program can easily decode things.
Of course different shifts need different settings, but that can be done by DX-Buddy.
But it is not always that easy. What works with RTTY does not work with HFDL. HFDL works on the frequency listed. No offset is needed.
What DX-Buddy does
DX-Buddy takes care of the frequency offset needed to "hear" the signals of utility stations. Click on the frequency you want to listen to and DX-Buddy finds the correct tuning for that. That works with both DX-Buddy-list and station-memory.
What DX-Buddy does when MultiPSK is connected
In that combination DX-Buddy does the setting needed to read the transmission on the screen. Your receiver is tuned to the right frequency. MultiPSK is set to the right mode and other settings are made if needed.
That is what I call a ONE-CLICK-TUNING.
As I did not receive all possible signals on my own receiver, I have not tested everything. If you find something not working propperly, it would be a great help if you could send me an email to tell me what went wrong. You can do this either in this forum or via email DL7NB@DX-BUDDY.NET.