I like the description "DSP-tracking crystal filters", it really says what they will do.
73 Stewart G3RXQ On Mon, 12 May 2008 19:36:16 -0700, wayne burdick wrote: > The K3 selects a filter based on the user's WIDTH setting, which > usually varies with the mode of operation. Typically you might select > 50 Hz to 1000 Hz WIDTH while using CW mode. We offer several crystal > filters in this range (200, 250, 400, 500, and 1000), and if you have > more than one installed, the K3 will select the optimal one > automatically. > > The idea of a variable-passband crystal filter is that it could replace > two or more fixed-bandwidth filters. For example, if we made one with a > BW of about 200-500 Hz, it could replace up to four crystal filters (in > practice, it would be replacing two or three at most). This would free > up one or two slots for other fixed- or variable-bandwidth SSB filters. > > Since this variable-passband filter has 8 steps of bandwidth, we can > optimize automatically it to be equal to or just a bit higher than the > selected DSP bandwidth (i.e., the WIDTH control setting). So you could > think of them as "DSP-tracking crystal filters." > > Wayne > N6KR > > On May 12, 2008, at 7:23 PM, Shane White wrote: > >> >> Wayne, I don't understand the concept of variable passband filters. >> Surely >> the K3 will just choose a filter based on the current operating >> frequency, >> and that filter will be used over a range of frequencies. How are >> these new >> filters you describe different? >> >> >> wayne burdick wrote: >>> >>> >>> 3. Later this year we'll be offering variable-passband crystal filters >>> that each cover a significant bandwidth range, e.g. 200-400, 400-800, >>> etc. (These are not finalized.) Each of these filters will have 8 >>> discrete bandwidths. As you adjust the DSP controls, the K3 will again >>> optimize the passband of the selected filter. >>> >>> 73, >>> Wayne >>> N6KR >>> >>> >> -- >> View this message in context: >> http://www.nabble.com/AGC-Design-of-the-K3-tp17199520p17199832.htm l >> Sent from the Elecraft mailing list archive at Nabble.com. >> >> _______________________________________________ >> 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 >> >> > --- > > http://www.elecraft.com > > _______________________________________________ > 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 _______________________________________________ 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
