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| using_sdr [2025/03/17 03:01] – in closing m7tox | using_sdr [2025/03/17 22:13] (current) – explained am and fm m7tox |
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| == Bandwidth == | == Bandwidth == |
| This bit is potentially the easiest bit to get wrong as a beginner. They are arranged in columns, if that wasn't evident, and you probably want to avoid the wider/narrower ones on the left in most instances. 'CW'((Continuous Wave)) is for morse, 'LSB'((Lower Side Band)) is used for frequencies below 10MHz, 'USB'((Upper Side Band)) is for frequencies above 10MHz, AM and FM are probably self explanatory. You may find that for these various options, the wide/narrow options improve how well you can hear the signal, though generally it's fine on the 'standard' setting rather than the 'narrow' one. | This bit is potentially the easiest bit to get wrong as a beginner. They are arranged in columns, if that wasn't evident. The left 'wider' and 'narrower' change the width of the yellow bandpass selector, although generally you won't need to very often. 'CW'((Continuous Wave)) is for morse, 'LSB'((Lower Side Band)) is used for frequencies below 10MHz, 'USB'((Upper Side Band)) is for frequencies above 10MHz. AM is twice as wide as SSB, for reasons that you can discover yourself by researching what SSB is (I recommend you do so, you'll need to for getting your license), so if you see something that looks twice as wide as the SSB signals, it might be regular AM. Some bands use FM more readily than AM modes, especially VHF. You can tell if something is FM because it will be symmetrical and looks like how a voice audio waveform looks on programs that show you the audio visually. Some of these have wide/narrow options, which may improve how well you can hear the signal, though generally it's fine on the 'standard' setting rather than the 'narrow' one. |
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| == Waterfall view == | == Waterfall view == |
