[RTTY] ARRL attack on current RTTY users

[Kok Chen]

On Nov 22, 2013, at 12:32 PM, Ben Antanaitis - WB2RHM wrote:

> What side band will these new modes use? LSB or USB?  

Doesn't matter.

LSB/USB are just two methods to translate a DC baseband signal up to RF.

Just like RTTY and PSK31, you can use either LSB or USB transmitters, as long as you send the transmitter a proper baseband audio signal.  (Same thing for receive direction.)

With SDR, you are simply moving a complex baseband signal (I/Q) up to RF by using a complex exponential, and you also end up potentially with much cleaner interpretation of the math than by using SSB hardware.

73
Chen, W7AY