[RTTY] So...2125 or 1275

[Thom]

My TS-480sat gives me 2 mark frequencies options for radio generated 
FSK.  2125 and 1275.

So which one should I use if I use 2 Tone as a decoder?

I kinda like the sound of 2125 and I keep the monitor at a low level in 
the shack.

thanks

Thom KI8W