"Configuration bandwidth" is the DSP bandwidth at which the given crystal
filter engages in the K3/K3S. This crystal filter remains engaged as the
DSP bandwidth is narrowed, to the point where another crystal filter's
"configuration bandwidth" is reached.
In choosing the configuration bandwidth,
On 2/10/2016 11:12 AM, j...@kk9a.com wrote:
> This sounds like a great idea. I used Inrad 250Hz filters in my Yaesu
> FT1000MP Mark-V and they worked great on RTTY but I found the 250Hz
> setting to be too narrow on my K3S.
The INRAD filters are spec'd for -3dB bandwidth. This goes way back to
This sounds like a great idea. I used Inrad 250Hz filters in my Yaesu
FT1000MP Mark-V and they worked great on RTTY but I found the 250Hz
setting to be too narrow on my K3S. Is anyone doing this?
John KK9A
RLVZ at aol.com RLVZ at aol.com
Wed Feb 10 00:05:30 EST 2016
A question regarding roofing
What the K3 contesters around here have done with the "400" and "250"
roofing filters is assign them 450 and 350. For someone running in a
contest, those are meaningful settings where is is *desired* to have the
DSP and roofing skirts concurrent for sharp adjacent channel rejection.
As to where th
Filter bandwidth is defined by two points either across the top or at
the knee of the filter. If the knee is 250 Hz wide at the 3 dB points
then measuring the 6 dB points may be 370 Hz wide. So without the
position of the filter where the measurement takes place, the number
relating to bandwi
Hi Dick,
Just do it. If you need a certain bandwidth for a certain mode, use the
narrowest roofer you have in there; just like in any other conventional
transceiver.
So if you want 350Hz as bandwidth, use that 250 filter (which is
actually 370). That's common sense.
Don't let the 250Hz tag on
A question regarding roofing filter "configuration bandwidth" settings on
the K3:
The factory default roofing filter "configuration bandwidth" setting is to
set the 250hz filter at a setting of "250". Therefore, the 250hz roofing
filter will engage at the same time as the 250hz DSP filter.
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