On Thu, May 22, 2008 at 10:53:12PM -0400, Achilleas Anastasopoulos wrote:
>
> So the signal u(t) needs to be sampled at 6 Complex-Msps, which is what you
> do (sampling it at 6.4 Complex-Msps, or as Eric wants at 8 complex-Msps).
>
I'm worried about the roll off at the edges of the passband at 6.
Chuck,
I have a question regarding the comment you made in an earlier email on
the subject:
You said:
-
Now my question: Is it possible to tune the usrp so the carrier is at
+.31 Mhz ? (band center at 3, from -.2 to 6.2Mhz?) Then we could run
the cpll at 6.4 or 8Msps and get anoth
Hi
I will be trying to connect a usrp to a virtual machine this weekend, I
will let you know what happened.
I do know from previous experience that the usrp can send data at a
higher data rate than a virtual machine can handle, so there is a lot of
over run errors.
I only use vm's for testing.
By
Hi,
I 'd like to connect two daughterboards (on two separate USRP boxes)
with a coax cable. The cable will replace the two RFX2400 antenna.
What kind of coax cable do I need to buy? Anyone has any experience?
Thanks.
David
___
Discuss-gnuradio ma
After reading a bunch of questions about GPS antennas I am making myself
the guinea pig. I just ordered the "Mighty Mouse 3" active GPS antenna.
The spec sheet quotes +5dBi gain at zenith and -1dBi at 10 degrees. I
ordered the antenna from:
http://www.gpszone.ca/accessories/antennas/mm3.php
T
Eric Blossom wrote:
>
> On Thu, May 22, 2008 at 04:43:23PM +0200, Wolfgang Buesser wrote:
>> Hi,
>>
>> what is the simplest way to caluclate the average of a stream?
>>
>> I generate a stream of fixed length using head(). I would like to
>> calculate the linear average (i.e.
>> sum_of_all_sam
If your main use for this board is going to be broadcast FM, I would
strongly urge you to use a fixed oscillator and a simple mixer to
downconvert the received signal into a range that avoids alias. The fact
that FM broadcast band is split by a fold when used for direct conversion
makes it a bit c
On Thu, May 22, 2008 at 09:34:43AM -0700, isaacgerg wrote:
>
> It looks like i need to get an RF front end to pre-filter all that stuff out
> of there.
There's a reason Matt offers all those daughterboards ;-)
You may want to consider the TVRX d'board. It covers 50 MHz to 870 MHz.
http://
Does anyone know of a GPS antenna that they have had good experiences
with and would recommend?
Thanks
Quoting Gregory W Heckler <[EMAIL PROTECTED]>:
Bryan:
The DBS-RX is the way to go. I use the +5V bias on the DBS-RX, and
it works fine, with the added benefit of not adding another AC-D
On Thu, May 22, 2008 at 04:43:23PM +0200, Wolfgang Buesser wrote:
> Hi,
>
> what is the simplest way to caluclate the average of a stream?
>
> I generate a stream of fixed length using head(). I would like to
> calculate the linear average (i.e.
> sum_of_all_samples/number_of_samples).
>
> Thank
It looks like i need to get an RF front end to pre-filter all that stuff out
of there.
--
View this message in context:
http://www.nabble.com/BasicRx-Daugterboard-Frequency-Wrapping-tp17375343p17408282.html
Sent from the GnuRadio mailing list archive at Nabble.com.
___
ALeX wrote:
Hello,
I'm working on a Gps software in conjunction with a usrp and dbsrx.
Unfortunately my dbsrx has an hardware problem and I can't acquire Gps
samples. Can someone record samples in L1 frequency (1.57542 Ghz) for
me in 6.4msps/complex or 6.4msps/shorts and make it available for
isaacgerg wrote:
The mapping you ask describing isnt what I am getting. According to your
scheme, with the Basic RX board, I shouldnt be able to get any FM radio
stations, but I am able to get them. Why is this?
The daughterboard software knows about aliasing, and maps accordingly
when you a
Steven Clark-2 wrote:
>
> hex 00 and 01 are not visible characters, which is why you aren't
> seeing anything. Looking at the data, it looks like unpacked data (ie
> only the bottom bit of each byte is being used). If you convert it
> back to packed data, it may be you'll get your original mess
Chuck,
Isn't this line
> gr_complex filtered_IQ = afc.filter(gr_complex(I,Q));
supposed to be
> gr_complex filtered_IQ = afc.filter(IQ);
instead?
Achilleas
Almost working:
gr_complex input = agc.scale(in[k]);
gr_sincosf(d_phase,&a_sin,&a_cos);
gr_complex IQ = input * gr_complex
The mapping you ask describing isnt what I am getting. According to your
scheme, with the Basic RX board, I shouldnt be able to get any FM radio
stations, but I am able to get them. Why is this?
Isaac
--
View this message in context:
http://www.nabble.com/BasicRx-Daugterboard-Frequency-Wra
In the short term, how do i fix this problem? Do I just low pass filter my
incoming signal?
Isaac
Ed Criscuolo-2 wrote:
>
> isaacgerg wrote:
>> Hi,
>> I am hooked up to the BasicRx Daughterboard and wrote a simple
>> applicate
>> using the GRC to survey the spectrum from 1MHz to 250MHz and
I have a 60 second sample of GPS at 4msps here:
http://www.kd7lmo.net/ground_gnuradio_ota.html
On Thu, 22 May 2008, ALeX wrote:
> Hello,
> I'm working on a Gps software in conjunction with a usrp and dbsrx.
> Unfortunately my dbsrx has an hardware problem and I can't acquire Gps
> samples. Can
Hi,
what is the simplest way to caluclate the average of a stream?
I generate a stream of fixed length using head(). I would like to
calculate the linear average (i.e.
sum_of_all_samples/number_of_samples).
Thanks
Wolfgang
___
Discuss-gnura
isaacgerg wrote:
Hi,
I am hooked up to the BasicRx Daughterboard and wrote a simple applicate
using the GRC to survey the spectrum from 1MHz to 250MHz and run the user
tunable output through the WFM Demodulator. I can get FM radio stations in
the 88-108MHz region just find. However, I am also
isaacgerg wrote:
Hi,
I am hooked up to the BasicRx Daughterboard and wrote a simple applicate
using the GRC to survey the spectrum from 1MHz to 250MHz and run the user
tunable output through the WFM Demodulator. I can get FM radio stations in
the 88-108MHz region just find. However, I am also
Hello,
I am new in SDR so maybe the question might seem childish...
I want to transmit some data at 24 Kbps using CPM modulation and USRP :).
In the gnuradio-3.1.2/gnuradio-examples/python/digital i found the
tx_voice.py example.
Following the example I did my own setup but the problem is that w
Hi,
I am hooked up to the BasicRx Daughterboard and wrote a simple applicate
using the GRC to survey the spectrum from 1MHz to 250MHz and run the user
tunable output through the WFM Demodulator. I can get FM radio stations in
the 88-108MHz region just find. However, I am also getting copies of
Hello,
I'm working on a Gps software in conjunction with a usrp and dbsrx.
Unfortunately my dbsrx has an hardware problem and I can't acquire Gps
samples. Can someone record samples in L1 frequency (1.57542 Ghz) for me in
6.4msps/complex or 6.4msps/shorts and make it available for download or
uplo
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