On Tue, 19 Aug 2008 13:26:25 -0700 (PDT), Bill W4ZV wrote: >Well why not the -60 to -80 dB points? :-)
Because -35 dB or so is the best I can do. If you lived close to W0YK, you'd WANT to know what's happening at -60dB! :) >Two points are entirely >sufficient to **center** the filter's 6 dB bandwidth, which was the question >asked. I don't think -6dB bandwidth was the question, but rather how to measure the filter. Whatever -- a single number description is quite limited. >Regarding Ed's comment about ripple, we'll never see 6 dB ripple >excursions unless there is a defective filter. I've not seen enough going on in the passband to even begin to call it ripple. BUT -- when I'm measuring something, the more detail I can see the more I know about it. The fact that the filters ARE quite flat in passband is something that I want to know! Having read LOTS of product data sheets that looked like they were drawn by an artist rather than measured, its quite encouraging to see a product that actually measures like it's data sheet! 73, Jim Brown K9YC _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
