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Re: [Discuss-gnuradio] Maximum TX frequency limit

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] Maximum TX frequency limit
Date: Sat, 15 Apr 2006 13:06:56 -0700
User-agent: Mutt/1.5.9i

On Sat, Apr 15, 2006 at 02:00:00PM +0200, Matteo Campanella wrote:
> Hello, I found out that the max tx freq is limited in usrp_standard.cc
> to 44MHz (since USE_FPGA_TX_CORDIC is undef'd). Now, since a 128MSps
> should safely ensure 64MHz, what is actually imposing that limitation?

It's set by the passband of the interpolator in the AD9862.  See the
datasheet for details.

> I was trying to go to 6mtrs ham band...

Use a harmonic.  You *are* going to want some filtering ;)


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