I was just poking around the INRAD site and checked out some of the filter
curves. I see they are prone to a little specsmanship - their "400 Hz" filters
for the Omni are really 490 Hz at 6 dB down (both the 750 and 753 filters), and
the "250 Hz" #751 filter is actually 340 Hz at 6 dB down. I supposed they made
up what they could with good shape factor that would be nominally close to the
button markings on the rig, but I think I'd have called the 400 Hz filters 500
Hz instead. That said, I wonder what the Network Sciences filters' bandpass
curves look like.
73, Duane AC5AA (with one INRAD 400 Hz <really 420> installed in an old
IC-735...)
Duane A. Calvin
Server Systems Test Engineer
Dept. 76TS RS/6000 - SP Nodes
IBM Austin, TX >O< Tie: 793-3368
--
FAQ on WWW: http://www.contesting.com/tentecfaq.htm
Submissions: tentec@contesting.com
Administrative requests: tentec-REQUEST@contesting.com
Problems: owner-tentec@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|