Rough example of possible table for front page:

Mode	Frequency Range (kHz)	Bandwidth (kHz)	Shift (Hz)	Number of Tones	Key Features	Sources	Recording	Spectrum Image
Non DATA Modes
	Communications Modes
USB	All Frequencies in the HF Range	Typically 2.4 to 3.0 kHz, can be wider or narrower	Not Applicable	Not Applicable	No carrier present in Spectrum, audio typically bunched to towards the left (low frequency)	World wide	USB recording link here	200 x 200 pixel thumbnail of spectrum image
LSB	All Frequencies in the HF Range	Typically 2.4 to 3.0 kHz, can be wider or narrower	Not Applicable	Not Applicable	No carrier present in Spectrum, audio typically bunched to towards the right (low frequency)	World wide	LSB recording link here	200 x 200 pixel thumbnail of spectrum image
AM	All Frequencies in the HF Range	Typically 2.6 to 10.0 kHz, can be wider or narrower	Not Applicable	Not Applicable	Carrier present in center of signal, audio mirrored left and right of the carrier	World wide	AM recording link here	200 x 200 pixel thumbnail of spectrum image
	Non Communications Modes
PLUTO Radar	8000 to 38000	3 to 40 kHz, depending on specific operating conditions	Not Applicable	Not Applicable	FMCW transmission, presenting a wide signal equal to the swept (chirp) width, sweep rate creates a pulsed sound affect	British Sovereign base of Akrotiri, Island of Cyprus	PLUTO recording link here	200 x 200 pixel thumbnail of spectrum image
16 x 64 Sounder (unofficial name)	Below 4000 to above 30000	3 kHz	Not Applicable	Not Applicable	FMCW transmission, changes sweep rates in 16 steps, resulting in 16 different sounds per transmission	Unknown	16 x 64 Sounder recording link here	200 x 200 pixel thumbnail of spectrum image
Mode	Frequency Range (kHz)	Bandwidth (kHz)	Shift (Hz)	Number of Tones	Key Features	Sources	Recording	Spectrum Image
DATA Modes
	FSK
STANAG 4491 FSK	All Frequencies in the HF Range	0.85 kHz (850 Hz)	850 Hz	2	Appears as two lines on waterfall, separated by the shift, normally encrypted	Used by NATO forces world wide	4491 FSK recording link here	200 x 200 pixel thumbnail of spectrum image
CIS 36-50, BEE, T-600	All Frequencies in the HF Range	0.085 to 0.500 kHz (85 to 500 Hz depending on mode)	85, 125, 250, or 500 Hz, only one shift used at a time	2	Appears as two lines on waterfall, separated by the shift, normally encrypted	Used by Russian or Russian supplied forces, a mode of the T-600 modem	CIS 36-50 recording link here	200 x 200 pixel thumbnail of spectrum image
	MFSK
	PSK
	SELCAL
	Image