> I'm surprised I can see a difference between the two tones > through the flatter filter 8-pole filter. It's just enough > to see on the 200W scale of an old (pretty much uncalibrated) > Daiwa CN-520.
With the 8 pole filter I see 2 watts difference on the N8LP LP-100 wattmeter. However, in AFSK A or DATA A modes for PSK I see as much as 15 watts (0.7 dB) difference (maximum to minimum) as the tone frequency varies from 200 Hz to 2800 Hz in DATA A (FC=1500 Hz) or 1000 Hz to 3500 Hz in AFSK (FC=2210 Hz). 73, ... Joe, W4TV > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Randy Farmer > Sent: Sunday, September 27, 2009 7:57 PM > To: [email protected] > Subject: Re: [Elecraft] [K3] K3 FSK power transients > > > The roofing filter IS offset to put the RTTY tones (Data | > Pitch) in the center of the filter. > > Good to know. That's how I would have done it I were the designer. > I'm surprised I can see a difference between the two tones through > the flatter filter 8-pole filter. It's just enough to see on the 200W > scale of an old (pretty much uncalibrated) Daiwa CN-520. > > 73... > Randy, W8FN > ______________________________________________________________ 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
