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
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