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[Discuss-gnuradio] Re: fm_tx_2_daughterboards output 2nd board is AM!!
From: |
anmar |
Subject: |
[Discuss-gnuradio] Re: fm_tx_2_daughterboards output 2nd board is AM!! |
Date: |
Mon, 26 Feb 2007 21:14:48 +0100 |
> I don't think anything's wrong. What do you expect the output to be?
fm modulated signale on the scoop.
> The way you've got it set up, side A is modulating a 10 MHz carrier
> with a 600 Hz tone. Side B is modulating a 12Mz tone with the sum of
> 350 + 440 Hz tones.
>
> I'm assuming you've got two Basic Tx daughterboards installed, right?
yes
> While this is running, have you looked at all 4 outputs, the two on
> the A side and the two on the B side? The two on the A side will be
> related. One of them is shifted 90 degress from the other. Likewise,
> the two on the B side are related. One of them is shifted 90 degrees
> from the other.
ok i tryed that and indeed 90 degrees shift
>
> Eric
how does the sample rate and the interp effect the output, should the
sample rate be 64 MPS because we have two outputs.
i have read on the forum that we should not use 'set_freq(0, freq0)',
but use
self.u.tune(self.subdev[side]._which, self.subdev[side], target_freq)
insted. what are the differnt?
and can i want to use 10mhz low pass filter how can i add it to the
code? how should i connect it to the sig? btw what is the function of
the interleaver. 'intl = gr.interleave(gr.sizeof_gr_complex)'
thanks
anmar
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