Re: [Discuss-gnuradio] how is interpolation rate dynamically set?

[Bill Stevenson]

Yes, the final sampling rate of DAC is 128Msps which is fixed number. But what is the default value for interpolation rate? As we know, bitrate=128M/interpolation rate/samples per symbol* bit per symbol, while bit per symbol could be known from modulation scheme, how to calculate interpolation rate once the bitrate is set? Thanks!

Bill

----- Original Message ----
From: Brian Padalino <address@hidden>
To: Bill Stevenson <address@hidden>
Cc: address@hidden
Sent: Friday, September 26, 2008 6:16:42 PM
Subject: Re: [Discuss-gnuradio] how is interpolation rate dynamically set?

On Fri, Sep 26, 2008 at 6:10 PM, Bill Stevenson
<address@hidden> wrote:
> Thank you, Brian!
>
> Now i know how the interpolation changes, but if bitrate were set, how are
> interp/decim rate and
> samples-per-symbol derived respectively? Is there a default value for
> interpolation rate? Thanks!!!

I believe the USRP operates at 128Msps for the TX DAC.  This value
does not change.

Brian