Re: [Discuss-gnuradio] how to suspend the flowgragh without any signal transmission for a few sec

[ikjtel]

  On Mon, Feb 14, 2011 at 3:09 AM, Venkat Vinod <address@hidden> wrote:
> 2. Is time.sleep() function is an appropriate way to use for OFF
> cycles in my model ?? If not can anyone suggest me better way to
> break the transmission using GNU blocks ??

  On Fri, 18 Feb 2011 14:05:33 -0500 Yan Nie wrote:
> how to pause the system for 5 milliseconds? ... time.sleep(0.005)
>

The op25-dev p25 transmitter faces a similar problem of how to
have real-time PTT (push to talk) - the transmit duty cycle is
usually far lower than 100%.  

During periods of inactivity, the TX block (which connects directly
to the USRP sink block) just outputs zero-valued complex samples -
so a "signal" is still transmitted, but it has zero energy - and
no sleep() is used.

Some of the gnuradio-example progs also contain calls such as
   self.subdev.set_enable(enable)            # set H/W Tx enable
although this might not give you a very fine tuned control in
terms of timing
( also no clue if set_enable() is universally supported or not).

Max