Vamshi,
I just gave you an example in the last message. To get more information
about the stream tags, please check out the GNU Radio wiki website
https://wiki.gnuradio.org/index.php/Stream_Tags
Marcin
pon., 6 cze 2022 o 15:46 Vamshi Sainath Gavani <rafale10...@gmail.com>
napisał(a):
> can you give me an example of what the tags have to be?
> also, take a look at how I'm implementing the example you provided in my
> flowgraph.
>
>
> On Mon, Jun 6, 2022 at 6:31 PM Marcin Puchlik <m.puch...@is-wireless.com>
> wrote:
>
>> Hey,
>> So lets say that your hardware expects you to send samples at 1 MSPS rate
>> (1 million samples per second). Lets also assume that your bursts
>> always have 100k (one hundred thousand) samples. Let's also assume that you
>> want to send you bursts at 1 second period. What you have to do is to add
>> 900k additional null or noise samples after your burst samples to satisfy
>> the hardware. You can do that by using *Tagged Stream Mux* block where
>> you apply two tagged streams: burst stream (burst samples on the image) and
>> null stream (null samples on the image). Remember that both streams have to
>> be tagged.
>> I hope that helped
>> [image: image.png]
>>
>> pon., 6 cze 2022 o 13:50 Vamshi Sainath Gavani <rafale10...@gmail.com>
>> napisał(a):
>>
>>> Hey Marcin,
>>> Can you explain to me in short how to send null samples to the soapy
>>> sink or a link maybe? Sorry, I'm new to the GNU environment.
>>> Thanks.
>>>
>>> On Mon, Jun 6, 2022 at 2:00 PM Marcin Puchlik <m.puch...@is-wireless.com>
>>> wrote:
>>>
>>>> Vamshi,
>>>> I don't think that HackRF One supports bursty transmission (like USRP
>>>> UHD does). If you want to achieve a 3 seconds period bursty Tx you have to
>>>> provide an adequate amount of 'null' samples between the transmission
>>>> bursts to drive DAC. To verify that information I think you can ask on
>>>> HackRF mailing list. I think that people there will provide you more
>>>> reliable info.
>>>> Best,
>>>> Marcin
>>>>
>>>> pon., 6 cze 2022 o 10:12 Vamshi Sainath Gavani <rafale10...@gmail.com>
>>>> napisał(a):
>>>>
>>>>> So what I'm doing is transmitting with a HackRF One and when I run the
>>>>> flowgraph the transmission starts and frames are sent as bursts and
>>>>> between the bursts, the transmitter stays on and I would like to turn it
>>>>> off at tx_eob and turn on tx at tx_sob
>>>>> Below is the screenshot of the current flowgraph I'm implementing.
>>>>>
>>>>> On Mon, Jun 6, 2022 at 1:14 PM Marcin Puchlik <
>>>>> m.puch...@is-wireless.com> wrote:
>>>>>
>>>>>> Hi Vamshi,
>>>>>> First, what do you mean by turning off/on the transmitter?
>>>>>> Marcin
>>>>>>
>>>>>> pon., 6 cze 2022 o 09:14 Vamshi Sainath Gavani <rafale10...@gmail.com>
>>>>>> napisał(a):
>>>>>>
>>>>>>> Hello Folks,
>>>>>>>
>>>>>>> Here I'm implementing the transmission of LoRa Frames and I want to
>>>>>>> be able to stop the flowgraph(Stop Transmitting) between frames say the
>>>>>>> packet is set to transmit every 3s so at tx_eob turn off tx and tx_sob
>>>>>>> start tx.
>>>>>>> Below is my Flow graph code snippet can you let me know how I can
>>>>>>> turn off/on tx between the frames?
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> *def main(top_block_cls=lora_TX, options=None): tb =
>>>>>>> top_block_cls() def sig_handler(sig=None, frame=None):
>>>>>>> tb.stop()
>>>>>>> tb.wait() sys.exit(0) signal.signal(signal.SIGINT,
>>>>>>> sig_handler) signal.signal(signal.SIGTERM, sig_handler) tb.start()
>>>>>>> try: input('Press Enter to quit: ') except EOFError:
>>>>>>> pass
>>>>>>> tb.stop() tb.wait()if __name__ == '__main__': main()*
>>>>>>> Thanks and Regards,
>>>>>>> Sainath Vamshi
>>>>>>>
>>>>>>
