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Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards
From: |
Angilberto Muniz Sb |
Subject: |
Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards - I've got it ! |
Date: |
Sat, 11 Mar 2006 07:41:02 -0800 (PST) |
I think I've got it, Eric.
According to "usrp_standard.h" the set_mux method
understand the mux value a differente way...
BTW does the same mux value works for rx way?
Angilberto.
--- Angilberto Muniz Sb <address@hidden> wrote:
> Eric, it works but theres something I dont
> understand...
>
> No matter of what I put in the
> "self.u.set_mux(0xVVVV)"
> I always get 1st signal out to tx board A and 2nd
> signal out to tx board B.
>
> I suppose I could switch output channels just
> swapping
> the mux values...
>
> Also, according to "usrp_standard.cc" mux values
> should be "0,1,2" or "3". How come the example uses
> "a", "b", "9" and "8" ?! -- Im totally lost...
>
> Angilberto.
>
>
> --- Eric Blossom <address@hidden> wrote:
>
> > On Sun, Mar 05, 2006 at 02:21:55AM -0500, Satashu
> > Goel wrote:
> > >I am trying to find some information on how to
> use
> > the two Tx
> > >daughterboards to transmit independent data
> > streams?
> > >In one of the posts,
> >
>
>http://lists.gnu.org/archive/html/discuss-gnuradio/2005-10/msg00142.html
> > >Eric said that this can be done by using a
> "stream
> > with two interleaved
> > >channels of I & Q data".
> > >Does anyone know how to do this using the
> existing
> > blocks? It will be
> > >great if someone can post an example.
> > >
> > >Thanks,
> > >Satashu
> >
> > OK, I've got your example ready. It runs with any
> > kind of
> > daughterboard on either side. Here's an example
> of
> > running it with
> > a basic Tx on side A and a flex 400 on B:
> >
> > address@hidden usrp]$ ./fm_tx_2_daughterboards.py 10M
> > 446.1M
> > Using TX d'board A: Basic Tx
> > Using TX d'board B: Flex 400 Tx
> > Tuning side A to 10MHz
> > r.baseband_freq = 0
> > r.dxc_freq = 10M
> > r.residual_freq = 0
> > r.inverted = False
> > OK
> > Tuning side B to 446.1MHz
> > r.baseband_freq = 450M
> > r.dxc_freq = -3.9M
> > r.residual_freq = -381.47m
> > r.inverted = False
> > OK
> >
> >
> > Enter ^C to kill it.
> >
> > It puts out SSB (USB) signals. Side A gets a 600
> Hz
> > tone. Side B
> > gets 350 + 440 Hz (US dial tone). You should be
> > able to hear these
> > with a suitable receiver. Worked for me ;)
> >
> > It's checked in as
> >
>
gnuradio-examples/python/usrp/fm_tx_2_daughterboards.py
> >
> > and is also attached. Yes, you could consider
> > having to manually
> > interleave the output streams a bug.
> >
> > Eric
> > > #!/usr/bin/env python
> >
> > """
> > Transmit 2 signals, one out each daughterboard.
> >
> > Outputs SSB (USB) signals on side A and side B at
> > frequencies
> > specified on command line.
> >
> > Side A is 600 Hz tone.
> > Side B is 350 + 440 Hz tones.
> > """
> >
> > from gnuradio import gr
> > from gnuradio.eng_notation import num_to_str,
> > str_to_num
> > from gnuradio import usrp
> > from gnuradio import audio
> > from gnuradio import blks
> > from gnuradio.eng_option import eng_option
> > from optparse import OptionParser
> > import usrp_dbid
> > import math
> > import sys
> >
> >
> > class example_signal_0(gr.hier_block):
> > """
> > Sinusoid at 600 Hz.
> > """
> > def __init__(self, fg, sample_rate):
> >
> > src = gr.sig_source_c (sample_rate, #
> > sample rate
> > gr.GR_SIN_WAVE, #
> > waveform type
> > 600, #
> > frequency
> > 1.0, #
> > amplitude
> > 0) #
> DC
> > Offset
> >
> > gr.hier_block.__init__(self, fg, None,
> src)
> >
> >
> > class example_signal_1(gr.hier_block):
> > """
> > North American dial tone (350 + 440 Hz).
> > """
> > def __init__(self, fg, sample_rate):
> >
> > src0 = gr.sig_source_c (sample_rate, #
> > sample rate
> > gr.GR_SIN_WAVE, #
> > waveform type
> > 350, #
> > frequency
> > 1.0, #
> > amplitude
> > 0) #
> DC
> > Offset
> >
> > src1 = gr.sig_source_c (sample_rate, #
> > sample rate
> > gr.GR_SIN_WAVE, #
> > waveform type
> > 440, #
> > frequency
> > 1.0, #
> > amplitude
> > 0) #
> DC
> > Offset
> > sum = gr.add_cc()
> > fg.connect(src0, (sum, 0))
> > fg.connect(src1, (sum, 1))
> >
> > gr.hier_block.__init__(self, fg, None,
> sum)
> >
> >
> >
> > class my_graph(gr.flow_graph):
> >
> > def __init__(self):
> > gr.flow_graph.__init__ (self)
> >
> > usage="%prog: [options] side-A-tx-freq
> > side-B-tx-freq"
> > parser = OptionParser
> > (option_class=eng_option, usage=usage)
> > (options, args) = parser.parse_args ()
> >
> > if len(args) != 2:
> > parser.print_help()
> > raise SystemExit
> > else:
> > freq0 = str_to_num(args[0])
> > freq1 = str_to_num(args[1])
> >
> > #
> >
>
----------------------------------------------------------------
> > # Set up USRP to transmit on both
> > daughterboards
> >
> > self.u = usrp.sink_c(nchan=2) #
> say
> > we want two channels
> >
> > self.dac_rate = self.u.dac_rate()
>
=== message truncated ===
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- [Discuss-gnuradio] Simulateous transmission from two daughterboards, Satashu Goel, 2006/03/05
- Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards, Eric Blossom, 2006/03/07
- Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards, Satashu Goel, 2006/03/08
- Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards, Eric Blossom, 2006/03/08
- Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards, Eric Blossom, 2006/03/08
- Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards, Angilberto Muniz Sb, 2006/03/11
- Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards - I've got it !,
Angilberto Muniz Sb <=
- Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards - I've got it !, Eric Blossom, 2006/03/12
- Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards - I've got it !, Angilberto Muniz Sb, 2006/03/12
- Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards - I've got it !, Eric Blossom, 2006/03/13
- Re: [Discuss-gnuradio] Simulateous transmission from two daughterboards, Eric Blossom, 2006/03/11