Re: [softrock40] RXTX_04 Dividers
- MikeChecked the book, no help there. Did the math, yep, third harmonic.Thanks again.Tom----- Original Message -----From: Mike CollinsSent: Monday, January 31, 2011 1:22 PMSubject: Re: [softrock40] RXTX_04 DividersTune Tab: Set, 7.04 mhzTest Values: QSE Clk 0= 21.123QSE Clk 1= 21.123QSD Clk 0= 21.123QSD Clk 1= 21.123Does anyone have any explanation why my frequencies arn't nominal 7.04 like the auther's??
Are you using a freq counter? If so, they respond to harmonics. The QSD clocks are square wave which have 1st, 3rd, 5th, 7th,... harmonics.
Some freq counters have a LowPass button to help prevent this (sometimes depending on the rolloff).
73, Mike Collins KF4BQ
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