Re: IBOC and ssb or sync detection


Thanks, Jim.
Is an allignment of the BFO a big job?

--- On Thu, 2/18/10, jim_kr1s wrote:

From: jim_kr1s
Subject: [ultralightdx] Re: IBOC and ssb or sync detection
To: ultralightdx@...
Date: Thursday, February 18, 2010, 6:47 AM

Synchronous and SSB-ECSS detection depend on a locally generated signal at the intermediate frequency (IF). To allow the use of a single bandpass filter at the IF, that locally generated signal (beat-frequency oscillator -- BFO) is shifted in frequency when you toggle from LSB to USB. It's possible the BFO signal in your receiver is not aligned correctly, and also possible it's drifting as the set ages. This correlates with sporadic quality problems sometimes reported with other Grundig models.


Jim, KR1S
http://qrp.kearman. com/ 

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