Hell. I haven't tried this, but:
If you're building GNU Radio from source, you can use this:
https://github.com/marcusmueller/gnuradio/tree/uhd_add_tx_tune_tag_handling
ie. in your gnu radio directory do something like (assuming you're on
the master branch)
git pull https://github.com/marcusmuel
I'd just try. Clearly, physically retuning is bad in this case, but if
you haven't tried with the stream tag approach, you should.
Other than that, I think a relatively small patch to the USRP sink would
add a tx_tune tag, doing the same as the message of the same name,
namely allowing you to spec
well here's the thing: I need to transmit a burst every 7ms. From what
you've written about tuning times, i got somewhat pessimistic as to
whether this is enough time to retune. Or would you say that this should
be enough?
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Hi Mat,
> I decided to achieve frequency hopping not by changing the centre
> frequency of the USRP, but by multiplying my signal with a sine of a
> certain frequency offset and then transmit that signal over the USRP
> with a fixed USRP.
That's cool, but it's exactly what the FPGA of the USRP wou
hey man,
many many thanks for the detailed reply! Based on it, I decided to
achieve frequency hopping not by changing the centre frequency of the
USRP, but by multiplying my signal with a sine of a certain frequency
offset and then transmit that signal over the USRP with a fixed USRP.
Unfortun
Hi Mat,
the answer is a bit more complicated, I'm afraid:
so first of all, we need to distinguish latency from time it takes to tune.
Latency happens if you want the device to tune as soon as possible, and
will be mainly dominated by the latency of your general purpose OS
running on your general
Dear all,
After quite some searching, I wasn't able to find information about how
long it takes to retune a USRP (say, change the centre frequency). Do
you guys know anything about that? Specifically, I'm using a USRP X300
with a UBX160 daughterboard. Does anyone know how long it takes in this
spe
Sounds like you are on the right track. I'll add those details tomorrow.
Thanks,
Justin
Brian Padalino wrote:
On 9/7/07, Justin Shaw <[EMAIL PROTECTED]> wrote:
I think I have a misunderstanding regarding tuning the USRP.
I have connected the TX-A directly to RX-A. I am plotting the FFT of
On 9/7/07, Justin Shaw <[EMAIL PROTECTED]> wrote:
> I think I have a misunderstanding regarding tuning the USRP.
>
> I have connected the TX-A directly to RX-A. I am plotting the FFT of
> both the transmitted and received signal. I have tuned RX to 0 Hertz
> so I expect the positive frequencies to
I think I have a misunderstanding regarding tuning the USRP.
I have connected the TX-A directly to RX-A. I am plotting the FFT of
both the transmitted and received signal. I have tuned RX to 0 Hertz
so I expect the positive frequencies to look the same up to noise
affects.
What I get instead is m
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