[Discuss-gnuradio] graphical interface for gnu radio

[Josh Blum]

I have been working on a graphical interface for gnu radio. I was 
wondering if there are any gnu radio enthusiasts willing to check out my 
program and give me some feed back. I call it gnu radio companion or 
GRC. Here is the link http://www.joshknows.com/?key=grc


Thanks,
-Josh


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Re: [Discuss-gnuradio] graphical interface for gnu radio

[Berndt Josef Wulf]

On Monday 01 January 2007 18:30, Josh Blum wrote:
> I have been working on a graphical interface for gnu radio. I was
> wondering if there are any gnu radio enthusiasts willing to check out my
> program and give me some feed back. I call it gnu radio companion or
> GRC. Here is the link http://www.joshknows.com/?key=grc

Interesting, but doesn't run on a NetBSD-4.99.5 system see below:

barossa: {72} ./Main.py
app init
python: Error detected by libpthread: Unlocking unlocked mutex.
Detected by file "/usr/src/lib/libpthread/pthread_mutex.c", line 363, 
function "pthread_mutex_unlock".
See pthread(3) for information.


cheerio Berndt


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Re: [Discuss-gnuradio] graphical interface for gnu radio

[Pawel Koszut]

I tried it uder Ubuntu and openSuse and it runs fine.
(openSuse required python-gtk and pyxml packages)

Up to now, I have tested several visual components, and I had only problem with 
USRP source.
Below is detailed output.
I think it will be very useful tool and look forward as you continue this 
project.

Pawel


Traceback (most recent call last):
  File "RunnableFlowGraph.py", line 162, in ?
app.SetTopWindow(RunnableFlowGraph(sys.argv[1]))
  File "RunnableFlowGraph.py", line 51, in __init__
self.parse_nested_data(nested_data)
  File "RunnableFlowGraph.py", line 147, in parse_nested_data
if runnable_signal_block != None: self.signal_blocks_dict[id] = 
runnable_signal_block(*data_type_params)
  File "/home/pawel/programy_gr/grc_0.50/src/RunnableSignalBlocks.py", line 17, 
in USRP_SOURCE
u = usrp.source_c(USRP_number, decimation.parse())
  File "/usr/local/lib/python2.4/site-packages/gnuradio/usrp.py", line 245, in 
__init__
_ensure_rev2(which)
  File "/usr/local/lib/python2.4/site-packages/gnuradio/usrp.py", line 82, in 
_ensure_rev2
v = _look_for_usrp(which)
  File "/usr/local/lib/python2.4/site-packages/gnuradio/usrp.py", line 74, in 
_look_for_usrp
d = usrp_prims.usrp_find_device(which)
NotImplementedError: Wrong number of arguments for overloaded function 
'usrp_find_device'.
  Possible C/C++ prototypes are:
usrp_find_device(int,bool)
usrp_find_device(int)


On Monday 01 January 2007 09:00, Josh Blum wrote:
> I have been working on a graphical interface for gnu radio. I was
> wondering if there are any gnu radio enthusiasts willing to check out my
> program and give me some feed back. I call it gnu radio companion or
> GRC. Here is the link http://www.joshknows.com/?key=grc
>
> Thanks,
> -Josh
>
>
> ___
> Discuss-gnuradio mailing list
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[Discuss-gnuradio] args and patching

[Dan Halperin]

Hey,

1) I want to add a switch for which USRP (the which_board argument) is
used in the example scripts. -w seems to be used by some scripts
(usrp_siggen.py for example); is -W open?

2) What's the proper procedure for submitting patches? I've seen people
email to the list...

Thanks,

Dan


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[Discuss-gnuradio] New Software Defined Receiver soon to be available

[Philip Covington]

Highlights:

16 bit 130 MSPS ADC
HPF, LPF, RF AMP Switchable Front End
0-31.5 dB Attenuator in 0.5 dB steps
Cyclone II FPGA
Two AD6620 DDC co-processors
USB 2.0 480 Mbps High Speed Interface to PC
0.1 to 33 MHz coverage (0.1 to 65 MHz extended)
RX bandwidths from 33 MHz to 1kHz
Two independent RX channels anywhere in 0.1 to 33 MHz
6.00" X 4.00" board size
Single +12V 1A supply
Open Source Software and Hardware

Prototype picture and preliminary info at:



Soon to follow QS1R will be the QS1T transmitter board.

73 de Phil N8VB


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Re: [Discuss-gnuradio] no green snake

[Don Ward]

Thanks for the report.

- Original Message - 

From: Steve Kuhlmann

Following the trac instructions my Cygwin installation was going smoothly 
until

hitting wxPython.  I installed the latest version 2.8.0.1.

Some observations:

1)   the statbmp patch appears to already be applied


That patch is not needed in 2.8.0.1.

2)   the build wxPython step did not recognize the flag 
BUILD_AUTOMATE.


The automate stuff is gone.


3)   Assuming these were not fatal,  I tried the demo and the file
/usr/lib/python2.4/site-packages/wx-2.8-msw-ansi/wx/py/editwindow.py 
could

not import stc.


Apparently the (formerly optional) stc package is now needed to run the 
demo.  As far as I know it is not needed for GNU Radio.


The wiki instructions have been updated to reflect the above changes.




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[Discuss-gnuradio] Gain ahead of Basic RX?

[John Ackermann N8UR]

As mentioned earlier, I'm working on a front-end board for the Basic-RX
to provide some gain and selectivity for HF use.

Question -- has anyone figured out what sort of gain is optimum ahead of
the the Basic-RX for use as an HF receiver?  I can easily tweak the
front-end design to provide anything from about 8 to 18 dB gain; more
than that might require adding a second amp stage, which is doable if
necessary.

Thanks,

John


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Re: [Discuss-gnuradio] Gain ahead of Basic RX?

[Charles Swiger]

On Mon, 2007-01-01 at 13:41 -0500, John Ackermann N8UR wrote:
> As mentioned earlier, I'm working on a front-end board for the Basic-RX
> to provide some gain and selectivity for HF use.
> 
> Question -- has anyone figured out what sort of gain is optimum ahead of
> the the Basic-RX for use as an HF receiver?  I can easily tweak the
> front-end design to provide anything from about 8 to 18 dB gain; more
> than that might require adding a second amp stage, which is doable if
> necessary.
> 

John - I use 18db gain .5-30Mhz amps from Advanced Receiver Research, as
well as their 29db GAsFet amps for 7-7.4Mhz.  Another workhorse is a
29db .05-150Mhz Minicicuits ZHL-32A. 

I've been playing with a mobile hamstick antenna with great success due
to two things: good band conditions recently (k index near zero) and
being able to park in a quite place away from power lines and consumer
electronics. My apartment is so noisy from all the neighbors electronics
that 40 meters is completely unusable, nothing but noise all the time.

Here's a snapshot of the 40 meter band using the ZHL-32A
and a trunk mounted 40m hamstick in the park:

http://webpages.charter.net/cswiger/40m_spectrum.jpg


Last night, using the 29db and hamstick, logged EA8EQ, FM5AN, JR1CFP,
JE6DOI, etc. - AND have the band recorded for proof ;)

--Chuck




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Re: [Discuss-gnuradio] Gain ahead of Basic RX?

[Matt Ettus]

John Ackermann N8UR wrote:
> As mentioned earlier, I'm working on a front-end board for the Basic-RX
> to provide some gain and selectivity for HF use.
>
> Question -- has anyone figured out what sort of gain is optimum ahead of
> the the Basic-RX for use as an HF receiver?  I can easily tweak the
> front-end design to provide anything from about 8 to 18 dB gain; more
> than that might require adding a second amp stage, which is doable if
> necessary.
>   

Using an BasicRX on a USRP with the PGA turned all the way (+20dB) up is
roughly like having a 35dB noise figure.  Based on that and your desired
system noise figure, you can tell how much gain you need ahead of it. 

On the high side, with the PGA turned down (0dB), the ADCs will clip at
2Vpp.

Matt


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Re: [Discuss-gnuradio] New Software Defined Receiver soon to be available

[Marcus Leech]

Philip Covington wrote:

Highlights:

16 bit 130 MSPS ADC
HPF, LPF, RF AMP Switchable Front End
0-31.5 dB Attenuator in 0.5 dB steps
Cyclone II FPGA
Two AD6620 DDC co-processors
USB 2.0 480 Mbps High Speed Interface to PC
0.1 to 33 MHz coverage (0.1 to 65 MHz extended)
RX bandwidths from 33 MHz to 1kHz
Two independent RX channels anywhere in 0.1 to 33 MHz
6.00" X 4.00" board size
Single +12V 1A supply
Open Source Software and Hardware

Prototype picture and preliminary info at:



Soon to follow QS1R will be the QS1T transmitter board.

73 de Phil N8VB



Phil, this looks pretty good.

A quick comment, though.   Some of the daughtercards for the USRP 
produce complex baseband signals (I and Q), which
 are then sampled by the twin 12-bit A/Ds.   Since you are using 
real-mode only sampling, it would be inconvenient to
 attach (for example) a DBS_RX type front-end to your SDR card, since 
the DBS_RX uses a complex baseband.
 All of the modern satellite front-end chips, for example, use a 
complex-baseband direct-conversion approach.


My interest is radio astronomy, and while I'm perfectly happy with the 
USRP for my own use, I'd be happy to include support for
 your HPSDR card in my radio astronomy applications once your product 
is stable, and there's "driver" support in

 Gnu Radio for it...




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Re: [Discuss-gnuradio] Gain ahead of Basic RX?

[John Ackermann N8UR]

Matt Ettus said the following on 01/01/2007 03:52 PM:
=
> Using an BasicRX on a USRP with the PGA turned all the way (+20dB) up is
> roughly like having a 35dB noise figure.  Based on that and your desired
> system noise figure, you can tell how much gain you need ahead of it. 

Thanks, Matt.  So it looks like 20+dB gain would be desired, at least
for the higher bands.  One version of the amp chip I'm using (a
Mini-Circuits 3rd generation monolithic amp called a "GALI") has about
25dB gain, 2.6dB noise figure, and an IP3 output of +37dBm (so about
+12dBm input).  Looks like that may do the trick.

John


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[Discuss-gnuradio] Down Conversion on USRP

[science quest]

Hi all
   Newbie here. I am using FLEX 2400 daughterboard with USRP. On
the exploring GNUradio web page it is mentioned under the title "what goes
in FPGA" that there is a NCO and Decimation filter in FPGA. I did  a quick
scan of the FLEX 2400 receive schematic and it appears to me that it is a
direct conversion receiver. So if it is a direct conversion receiver with
the demodulation and filtering bringing the signal to baseband, why do we
need the NCO and Decimation filter in the FPGA? Please correct me if I have
interpreted this incorrectly.

Thank you
SQ
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Re: [Discuss-gnuradio] Down Conversion on USRP

[Matt Ettus]

science quest wrote:
> Hi all
> Newbie here. I am using FLEX 2400 daughterboard with USRP.
> On the exploring GNUradio web page it is mentioned under the title
> "what goes in FPGA" that there is a NCO and Decimation filter in FPGA.
> I did  a quick scan of the FLEX 2400 receive schematic and it appears
> to me that it is a direct conversion receiver. So if it is a direct
> conversion receiver with the demodulation and filtering bringing the
> signal to baseband, why do we need the NCO and Decimation filter in
> the FPGA? Please correct me if I have interpreted this incorrectly.

The RFX2400 is direct conversion, but the VCO/PLL only tunes in 4 MHz
steps (this is changeable, but leaving it this way gives the best phase
noise).  The DDC downconverts the rest of the way if necessary.

Some other daughterboards, like the TVRX, are not direct conversion.

Matt


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Re: [Discuss-gnuradio] Gain ahead of Basic RX?

[Charles Swiger]

On Mon, 2007-01-01 at 16:17 -0500, John Ackermann N8UR wrote:
> for the higher bands.  One version of the amp chip I'm using (a
> Mini-Circuits 3rd generation monolithic amp called a "GALI") has about

I just cracked open a Ramsey PR-2. The secret sauce is a upc1678,
available at mouser for $2.50. 





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