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Re: [Discuss-gnuradio] 2.2 GHz tx?


From: Matt Ettus
Subject: Re: [Discuss-gnuradio] 2.2 GHz tx?
Date: Wed, 14 Nov 2007 10:27:46 -0800
User-agent: Thunderbird 2.0.0.0 (X11/20070326)

Ed Criscuolo wrote:
I'm in the process of trying to put together a package to
do some of the direct sequence spread spectrum modulations
used by NASA's TDRSS relay satellites.  I need to be able to
transmit on 2287.5 MHz, and this appears to be just above the
the range of the RFX-1800 (2.1 GHz) and just below the range
of the RFX-2400 (2.4 GHz).  Is it possible to transmit on
this frequency using either of these daughterboards?

You can modify an RFX1800 or an RFX2400 by replacing the 2 VCO/PLL chips. You would need to remove the chips on there (ADF4360-3 in the case of the RFX1800, ADF4360-0 in the case of the RFX2400) and replace them with the ADF4360-1 from Analog devices.

Matt




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