Mike, Thanks! I figured there must be at least one station engineer on the list!
Mark -----Original Message----- From: Mike Naruta [mailto:[EMAIL PROTECTED] Sent: Tuesday, November 07, 2006 1:42 PM To: Jim Lux Cc: Eric Wachsmann; 'Mark Amos'; flexradio@flex-radio.biz Subject: Re: [Flexradio] Frequency calibration, measurement of unknowns with SDR1000Re: Question regarding commercial AM broadcasters' carrieraccuracy When I was chiefing, I think the AM tolerance was 20 Hertz. To tweak it, I would have to shut down a transmitter, open the door, and adjust the trimmer. They did not like me taking the station down, or switching to the auxiliary transmitter, so I just checked frequency occasionally. We also had quarterly, third party measurements, just to be sure that we complied. Let's see, 20 Hertz off at 1000 KHz is 200 Hertz off at 10 MHz. You're better off using WWV. They're fastidious about frequency. Mike - AA8K Jim Lux wrote: > At 01:30 PM 11/6/2006, Eric Wachsmann wrote: > > For AM broadcast stations, something like a 10 MHz oscillator divided > down to make a 25 kHz marker generator might work well. You'd be > able to capture the BC station of interest, as well as more than one > marker, in the same recording bandwidth. > > _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com
