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Re: [Discuss-gnuradio] GPS with DBSRX, Almost There

From: Marcus Leech
Subject: Re: [Discuss-gnuradio] GPS with DBSRX, Almost There
Date: Wed, 07 Mar 2007 15:08:09 -0500
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20060130 Red Hat/1.7.12-1.4.2

Robert McGwier wrote:

There is a multiplier circuit/ PLL in the DBS-RX. Whatever phase noise is coming from the oscillator is being multiplied considerably by this upconversion to be used at LO in the DBS-RX. You cannot get low phase noise oscillators and high performance mixers in that small a package. Together these considerations imply more power and territory and thermal control than is available with the DBS-RX.


Indeed, the target application space of the MAX2118 (satellite TV), upon which DBS_RX is based, has relatively sloppy
 phase-noise requirements.

Marcus Leech                            Mail:   Dept 1A12, M/S: 04352P16
Security Standards Advisor        Phone: (ESN) 393-9145  +1 613 763 9145
Strategic Standards
Nortel Networks                          address@hidden

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