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Re: [Discuss-gnuradio] Sampling Freq
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Sampling Freq |
Date: |
Fri, 23 Mar 2007 05:53:43 -0700 |
User-agent: |
Mutt/1.5.9i |
On Thu, Mar 22, 2007 at 02:14:05PM -0700, Johnathan Corgan wrote:
> Jonathan Shan wrote:
>
> >> What do you have the transmitter interpolation and receiver decimation
> >> set to?
> >
> > interp_rate = 64, decim_rate = 16.
> >
> > I saw the formulas
> > usb_sample_rate1 = 64e6 / decim_rate
> > usb_sample_rate2 = 128e6 / interp_rate
> >
> > Using current values, usb_rate1 = 2 * usb_rate2. I'm assuming.. to
> > get the correct sampling freq, usb_sample_rate at both ends should be
> > same?
>
> Correct.
And it would be better to use the
u.adc_rate() and
u.dac_rate()
methods to retrieve the rates than to hard code them.
Eric