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Re: [Discuss-gnuradio] GFSK frequency spectrum
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From: |
Michael Ossmann |
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Subject: |
Re: [Discuss-gnuradio] GFSK frequency spectrum |
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Date: |
Tue, 3 Nov 2015 07:18:29 -0700 |
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User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Tue, Nov 03, 2015 at 09:29:13AM +0000, Denis Stijn wrote:
>
> I have a question regarding the use of the GFSK modulator block. I
> have a simple schematic: a random repeating (Byte) source is connected
> to a GFSK mod block (Samples/Symbol: 8, Sensitivity: 707m, BT: 500m),
> which is connected to a throttle block (sample rate 444.444k), which
> is connected to an FFT Sink. I expected the resulting frequency
> spectrum to contain two peaks, at respectively -50 and 50 kHz (444444
> / (2*pi) * 0.707), however, I only have one peak at -50 kHz, and I
> can't figure out the reason behind this.
How have you configured the random source? Have you verified the output
of the source?
Mike