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Re: [Discuss-gnuradio] The correct way to receive pulses?

From: Matt Ettus
Subject: Re: [Discuss-gnuradio] The correct way to receive pulses?
Date: Tue, 12 Jun 2007 21:08:03 -0700
User-agent: Thunderbird (X11/20070326)

seph 004 wrote:
> My question is about the correct setup to receive
> pulses. I've managed to get my system to transmit 1
> second pulses at 16 ms intervals.
> I wanted to test how the usrp receives these pulses
> again by routing the output of the basic TX board, to
> the input of the basic RX board. This seems to work
> for continuous wave signals, but when I try to route
> my pulsed output back, the signal appearing on the
> host pc appears to be saturated. I end up getting a
> series of combs that don't seem to be related to the
> incoming pulse in anyway.
> The pulses are centred at 40 kHz and have 2 kHz bw.
> I've set the decimation rate to 250, and used the
> set_freq method to tune to 40 kHz. I know I can
> receive a 40 kHz wave as I have done so with a
> modified version of usrp_siggen.
> Is there something Ive overlooked in terms of the
> settings I've used?

What daughterboard are you using?  Only the LFRX and LFTX go down to 40 kHz.


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