Re: scopeing filters for eventual diversity receive.

Posted by N5GE on Mar 28, 2010; 12:05am
URL: http://elecraft.85.s1.nabble.com/scopeing-filters-for-eventual-diversity-receive-tp4810767p4811259.html

On Sat, 27 Mar 2010 15:09:02 -0700, "Ed Muns" <[hidden email]> wrote:

I matched all of my 8 pole filters by using the NGEN noise generator
and setting them for matching white noise pitch.

It seemed to work for me.

TOM, N5GE BT

73 ES GUD LUK
AR DE N5GE SK

[snip]

>
>The 8-pole filters are described as having "a nominal 0 offset" and do not
>need to be matched for diversity.  However, my 400Hz 8-poles are offset by
>as much at 80Hz.  The ordering page doesn't provide for matching 8-pole
>filters.  This is only an issue for the narrow filters and only if the
>offset delta between the two filters is greater than 10-20Hz.  If two 8-pole
>filters are offset, say, +60Hz and +80Hz, then you configure both for an
>offset of +70Hz and will be fine for diversity receive.
>
>Ed - W0YK

[snip]

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html