On 24/06/2011 1:06 PM, Patrik Tast wrote:
It came from a VERY old traditional GR build.
I thought *no changes there in source code init stage was altered*
after moving on to uhd, I was wrong.
Time for me to upgrade from trad to uhd. Latest git trad compile
does serve my needs still 100%
Thanks
-
From: Marcus D. Leech
To: discuss-gnuradio@gnu.org
Sent: Friday, June 24, 2011 19:11
Subject: Re: [Discuss-gnuradio] TVRX Microtune 4702 (4937) Gain question
On 24/06/2011 11:45 AM, Patrik Tast wrote:
Hi All,
I can not see in source code where GR is setting the TVRXx gain. I&#
riday, June 24, 2011 19:14
Subject: Re: [Discuss-gnuradio] TVRX Microtune 4702 (4937) Gain question
On Fri, Jun 24, 2011 at 5:45 PM, Patrik Tast wrote:
Hi All,
I can not see in source code where GR is setting the TVRXx gain. I'm
referring to
gnuradio-core/src/lib/io/mi
Aha I see,
It seems to be time for me to "upgrade" to uhd from traditional
Many thanks,
Patrik
- Original Message -
From: Alexandru Csete
To: Patrik Tast
Cc: Discuss-gnuradio@gnu.org
Sent: Friday, June 24, 2011 19:14
Subject: Re: [Discuss-gnuradio] TVRX Micr
On 24/06/2011 11:45 AM, Patrik Tast wrote:
Hi All,
I can not see in source code where GR is setting the TVRXx gain. I'm
referring to
gnuradio-core/src/lib/io/microtune.cc
If so (not set), what does it default to, max? See page 12 and
forward. The tuner document can be found at
http://www.poes-
On Fri, Jun 24, 2011 at 5:45 PM, Patrik Tast wrote:
> **
> Hi All,
>
> I can not see in source code where GR is setting the TVRXx gain. I'm
> referring to
> gnuradio-core/src/lib/io/microtune.cc
>
I'm don't think that code is related to TVRX. For old non-uhd driver you
need to look in the usrp/ho
On Wed, May 26, 2010 at 02:43:13PM +0700, Muhammad Najib wrote:
> Thank you for your previous response,
>
> About the algorithm,, it's rather straight forward without
> modification from the textbook
> 1. for the usrp, i use decimation of 8, with tuning frekuency at the
> middle of the channel(706
Thank you for your previous response,
About the algorithm,, it's rather straight forward without
modification from the textbook
1. for the usrp, i use decimation of 8, with tuning frekuency at the
middle of the channel(706MHz).
2.1 using 2 sine signal source, i shift video and audio carrier to 0Mh
On Mon, Mar 08, 2010 at 11:33:18AM +0700, Muhammad Najib wrote:
> Hello All,
>
> I'm trying to recreate Mr. Dayal's thesis about analog tv decoding
> using gnuradio.
> i have already got the black and white picture after taking 8MHz band
> with frequency centered in the middle of the channel.
>
>
Matt Ettus wrote:
>
> Nirali Patel wrote:
>> Matt,
>>
>> Is the TVRX daughter board expected to change anytime in near future?
>
>
> No
>
>
> Matt
>
>
is there any tv band transmitter daugterboard for USPR? and may i know why
there is currently only receiver is available for the TV band
>> I recently acquired a USRP with a TVRX. In the package there was also a
>> F -> SMA pigtail to put in the front.
>>
>> But that kinda surprised me from an impedance point of view because:
>> - The TVRX input is 75ohm according
>> - F connector is 75 ohm afaik.
>> - The RG316 cable used for t
Sylvain Munaut wrote:
Hi,
I recently acquired a USRP with a TVRX. In the package there was also a
F -> SMA pigtail to put in the front.
But that kinda surprised me from an impedance point of view because:
- The TVRX input is 75ohm according
- F connector is 75 ohm afaik.
- The RG316 cable us
On Sun, Jun 21, 2009 at 08:34:51PM +0200, Sebastiaan Heunis wrote:
> Martin
>
> Thanks for the reply. How do I set the mux then? Is 0xf2f0f2f0
> correct when I have 2 TV tuner modules and 0xf0f0f0f0 correct when I
> have only one?
Correct, assuming that in the single case the board is on the A
Martin
Thanks for the reply. How do I set the mux then? Is 0xf2f0f2f0
correct when I have 2 TV tuner modules and 0xf0f0f0f0 correct when I
have only one?
Just to recap, in case you can't remember what the mux, etc. looks
like. ADC 0 and 1 are on the first IC and ADC 2 and 3 are on the
second I
On Sun, 2009-06-21 at 15:15 +0200, Sebastiaan Heunis wrote:
> Hi all
>
> For some reason I always thought that the TVRX daughterboards support
> IQ sampling. Turns out I was wrong.
You are only partly wrong.
The TVRX is only sampled in I.
But the usrp firmware transforms this into IQ samples at
Andrew Lutomirski wrote:
Hi-
I'm having trouble with the gain control on a TVRX (actually, on a
whole bunch of TVRX's). There are two problems:
1. The effect of the gain setting is far from linear. I measured this
with the attached program, at 1 dB increments of requested gain, with
antennas
Engin Karabulut wrote:
hi all,
I have usrp and tvrx daughterboard,but tvrx sensitivity
is very bad, minimum input signal level is 40 dBuV(equal to-68dBm).
and noise figure is 8-10 dB. even if you have hi gain antenna, weak
signals die in TVRX. then I decided to purchase LNA next to antenna.
LNA
Matt Ettus
Sent: Sunday, March 08, 2009 3:22 AM
To: Sebastiaan Heunis
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] TVRx and BasicRx gain questions
Sebastiaan Heunis wrote:
> Matt
>
> Sorry to bother. Please tell me why I lose 6dB when measuring the
> signal at pins 17
Sebastiaan Heunis wrote:
Matt
Sorry to bother. Please tell me why I lose 6dB when measuring the
signal at pins 17 and 18? I have the RF transformer from Minicircuits
that is supposed to match the 200ohm output of the TVRX to a 50ohm so
that I can measure it on a spectrum analyser. Because it
Matt
Sorry to bother. Please tell me why I lose 6dB when measuring the
signal at pins 17 and 18? I have the RF transformer from Minicircuits
that is supposed to match the 200ohm output of the TVRX to a 50ohm so
that I can measure it on a spectrum analyser. Because it is matched,
I should not ha
Sebastiaan Heunis wrote:
Hi all
Can someone please provide me with some guidance? We are working on a
passive radar project and the aim is to implement a pcl radar receiver
on the USRP1 using TVRx daughterboards. I have the Microtune 7901.
I did some tests to see what the effects of the RF an
On Tue, Aug 26, 2008 at 10:54:24PM +0200, Sebastiaan Heunis wrote:
> Matt
>
> My DSPing is a bit rusty. With the TVRX card, we send -20MHz to the
> DDC. Is this because of 44-64 MHz? The code where the actual FPGA
> register gets written is in usrp_standard.cc?
Clue: it's called _write_fpga_re
Matt
My DSPing is a bit rusty. With the TVRX card, we send -20MHz to the
DDC. Is this because of 44-64 MHz? The code where the actual FPGA
register gets written is in usrp_standard.cc? Here is a function
called compute_fpga_freq_control_word which takes the -20MHz and
returns 2952790016 which
Sebastiaan Heunis wrote:
Hi
I need to figure out exactly what is happening to a captured signal
from the moment it enters the TVRX daughtercard to the moment it
enters the PC. At this moment I am conducting some experiments on the
TVRX card. I need to measure the signal that leaves the card an
JALLON Pierre 201932 wrote:
Thanks.
And what is the minimal level of signal that can be detected by the USRP (with
the TVRX) ?
Like for any other radio, it depends on the bandwidth of the signal.
That is why sensitivity is properly expressed as a noise figure -- it is
the only universal
u.org
Objet : Re: [Discuss-gnuradio] TVRX sensitivity
JALLON Pierre 201932 wrote:
>
> Dear all,
>
>
>
> What is the TVRX front end sensitivity?
>
It has a noise figure of roughly 10 dB.
Matt
___
Discuss-gnuradio mailing lis
JALLON Pierre 201932 wrote:
Dear all,
What is the TVRX front end sensitivity?
It has a noise figure of roughly 10 dB.
Matt
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Aadil Volkwin wrote:
Hi,
I would like to measure the actual signal that is output from the
module and subsequently input into the ADC.
After looking through the module Datasheet im still not entirely sure
which pins I ought to probe in order to extract this measurement.
I think it may be p
Nirali Patel wrote:
Hi,
Does the TVRX board have a front-end gain stage before the signal is
downconverted to IF? I will be using the TVRX and the USRP to capture over the
air HDTV signals in a mobile field test. I looked at the schematic for the TVRX
board and it looks there isn't a discrete
Nirali Patel wrote:
Matt,
Is the TVRX daughter board expected to change anytime in near future?
No
Matt
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
ok.. so i guess it is the passband sampling principle used here..
Do you still supply the MICROTUNE MT4937 module or some other ones?
___
Prasanna
On 10/15/07, Matt Ettus <[EMAIL PROTECTED]> wrote:
>
> Prasanna Rao wrote:
> > If IF is at 44MHz, is it further downconverted(to around 5-15
Prasanna Rao wrote:
> If IF is at 44MHz, is it further downconverted(to around 5-15MHz)
> before being fed to the ADC? I just want to know this out of
> curiosity. Pls let me know.
This is why I publish schematics. If you look at it you will see that
the output of the tuner goes straight to the A
> So, anything that works with the DBS_RX works also with the TV_RX?
yes
> Is
> the tuner real-mode only,
>
It doesn't matter. But yes, the analog signal is real
> and do you synthesize I and Q in the FPGA
yes, but again, it doesn't matter.
All that matters is that you get a 6 MHz w
If IF is at 44MHz, is it further downconverted(to around 5-15MHz) before
being fed to the ADC? I just want to know this out of curiosity. Pls let me
know.
_
Cheers!
Prasanna
On 10/12/07, Nirali Patel <[EMAIL PROTECTED]> wrote:
>
> >>I ordered Tvrx module and expect it to arrive at my pla
Matt Ettus wrote:
>
> Yes, the shippingones have an IF of 44 MHz. The older ones were 5.75
> MHz, but from the user's point of view, it doesn't matter. You don't
> need to know the IF.
>
>
>
> Matt
>
Actually that's something I was curious about as well. I'll likely be
picking up a TV_RX for
>>> 1) What is range of the IF I can set its output to?
>>>
> It has a fixed IF at 44Mhz I believe. A different version of the same tuner
> module comes with 5.75Mhz IF. Matt, please correct me if I am wrong.
>
Yes, the shippingones have an IF of 44 MHz. The older ones were 5.75
MHz, b
>>I ordered Tvrx module and expect it to arrive at my place soon. Hope it
will have a manual or imp guidelines on usage.
The TVRX will not come with a manual or guidelines on usage. You can find
the schematics at http://gnuradio.org/trac/browser/usrp-hw/trunk/tvrx
The TVRX module has a Microtune
It just happens I've got some MGA62563 from Avago (former Agilent) - those
are MMIC on steroids: 0.8dB noise figure from 50 to 1300 MHz, 22db gain -
5v supply, very simple polarization circuit. Let's see how it performs.
Given the very low intermod characteristic of the MMIC, i'll try without
filt
On Mon, Mar 06, 2006 at 11:17:59AM +0100, Matteo Campanella wrote:
> Hello, I started my testing evening (after ARRL worldwide phone contest,
> where I was desperately looking for Vermont to close WAS - are there hams
> in Vermont??? :-)) taking care of TVRX.
>
> First thing I did was to attach th
On Fri, Oct 21, 2005 at 05:33:22PM -0400, Weber, Michael J. (US SSA) wrote:
> What is the recommended position of the USRP gain setting when using the
> TVRX daughtercard?
Hi Mike,
First off, I strongly suggest you use CVS. Things are a lot different
with that code. Sooo, for the code currently
[EMAIL PROTECTED] wrote:
> Hi, all
> This may be a simple question but I can not find any definite answer
> from the archive.
> In the module interface, there are two RF data differential pairs
> from
> RF board to the USRP board: VINN_A, VINP_A; VINN_B, VINP_B.
> If there are t
On Mon, Sep 26, 2005 at 02:56:18PM +0800, [EMAIL PROTECTED] wrote:
> In the module interface, there are two RF data differential pairs
> from
> RF board to the USRP board: VINN_A, VINP_A; VINN_B, VINP_B.
> If there are two individual RF tuners on the RX board, I think they each use
> on
Quoting [EMAIL PROTECTED]:
> Is there a way to disable the AGC on the TVRX (cable MODEM) board?
>
> If a strong signal appears within the 6 MHz BW the AGC is activated and
> many weak signals are lost. It limits the receiver dynamic range to about
> 10dB.
There is no AGC running. The gain is c
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