[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] Multiplexing modulators
From: |
Marcus D. Leech |
Subject: |
Re: [Discuss-gnuradio] Multiplexing modulators |
Date: |
Tue, 21 Jun 2011 19:54:28 -0400 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc14 Thunderbird/3.1.10 |
On 06/21/2011 04:40 PM, John Ackermann N8UR wrote:
Thanks, Nick. I missed the sample rate factor because I was thinking of USRP1.
I'll fix that and the fallacy of adding rates, and try again.
Thanks,
John
I have an example, in GRC, attached.
It uses an audio source, which is common to all three modulators, this
goes to a fractional interpolator to interpolate up to the basic
sample rate of 200Ksps, which is an integral divisor of 100Msps.
I don't actually send it to a USRP2, but you can see the basic
structure, with complex multipliers acting as mixers, and a pair of
30Khz signal sources, sampled at the 200Ksps sample rate, one set for
30KHz, the other set for -30KHz. An FFT display shows
you the composite spectrum.
The bandwidth of the modulators is set by changing the "sensitivity"
parameter.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
three_fm_modulators.grc
Description: application/gnuradio-grc
three_fm_modulators.py
Description: Text Data
- [Discuss-gnuradio] Multiplexing modulators, John Ackermann N8UR, 2011/06/21
- Re: [Discuss-gnuradio] Multiplexing modulators, Alexandru Csete, 2011/06/21
- Re: [Discuss-gnuradio] Multiplexing modulators, Alexandru Csete, 2011/06/21
- Re: [Discuss-gnuradio] Multiplexing modulators, Johnathan Corgan, 2011/06/21
- Re: [Discuss-gnuradio] Multiplexing modulators, Marcus D. Leech, 2011/06/21
- Re: [Discuss-gnuradio] Multiplexing modulators, John Ackermann N8UR, 2011/06/21
- Re: [Discuss-gnuradio] Multiplexing modulators, Nick Foster, 2011/06/21
- Re: [Discuss-gnuradio] Multiplexing modulators, John Ackermann N8UR, 2011/06/21
- Re: [Discuss-gnuradio] Multiplexing modulators,
Marcus D. Leech <=
- Re: [Discuss-gnuradio] Multiplexing modulators, John Ackermann N8UR, 2011/06/24
- Re: [Discuss-gnuradio] Multiplexing modulators, Iain Young, G7III, 2011/06/28
Re: [Discuss-gnuradio] Multiplexing modulators, Marcus D. Leech, 2011/06/21
Re: [Discuss-gnuradio] Multiplexing modulators, Matt Ettus, 2011/06/21
Re: [Discuss-gnuradio] Multiplexing modulators, Johnathan Corgan, 2011/06/21