questions about gr-osmosdr

Pavel Demin pavel.demin at
Fri Sep 18 13:47:25 UTC 2015

Hi Sylvain,

> What do you mean by PTT ?
> (I mean I know what PTT means in the context of a walkie talkie, but I
> don't really see how it applies to the red pitaya or gr-osmosdr. Or
> rather I see several different things it could mean .. ).

In case of the Red Pitaya SDR transceiver, it's a command to enable or 
disable the transmitter output and eventually to drive a relay that 
switches the antenna between the RX path or TX path and/or to control an 
external amplifier.

I've seen that some SDR transceivers (Elad FDM-DUO, FLEX, ANAN) have an 
output called PTT-Out and graphical user interfaces of some SDR programs 
(Quisk, PowerSDR, QtRadio) have a button called PTT or MOX that controls 
the PTT output of the SDR transceivers. So, I thought that it's a common 
name for this kind of command.



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