Thanks, got it 73s Tom
-------- Original message -------- From: "Joe Subich, W4TV" <[email protected]> Date: 02/11/2013 16:42 (GMT-05:00) To: [email protected] Subject: Re: [Elecraft] Question about filters in USB as shown on a P3 The P3 display shows the "carrier (dial) frequency" as a vertical line and the audio (filter) bandwidth as the boarder bar. In USB/LSB the filter bandwidth is typically something like 200 Hz to 2900 Hz (for a 2.7 KHz "width"). If you have selected shift/width instead of Lo/Hi, adjusting "width" will reduce the bandwidth equally above and below the center frequency (typically 1500 Hz). Thus if you select "width" = 2.1 KHz the filter will be 500 - 2600 Hz and you will see 500 Hz between the vertical line (carrier/dial) and the actual filter response. 73, ... Joe, W4TV On 11/2/2013 4:28 PM, [email protected] wrote: > Hi, > > I have a question concerning what you see on the P3 when you tune in a USB > signal. > The green band that represents the bandwidth is not quite at the tuned in > frequency (center frequency) but is displaced slight higher in frequency. If > you lower the bandwidth say using a 2.1 KHz filter it has shifted quite a bit > up. > Can someone explain what is happening from the radio point of view please? > > Thanks, Tom VA2FSQ > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
