On the web page, it states that the filter shape factor for a 500 Hz
filter is 1.35:1 and a 2.6 KHz filter is 1.06:1. But I believe that
these values were taken at 48K sampling rate with a 1024 DSP filter.
I don't have a scope or a signal generator to check this, so I am asking
if anyone has
On 4/28/07, Tim Ellison [EMAIL PROTECTED] wrote:
On the web page, it states that the filter shape factor for a 500 Hz
filter is 1.35:1 and a 2.6 KHz filter is 1.06:1. But I believe that
these values were taken at 48K sampling rate with a 1024 DSP filter.
I don't have a scope or a signal
Tim,
It probably is at 48000 s/s and a 4096 buffer. I did some work on
measuring filters earlier. If you like, I will email you a copy of
Spectrogram 5.7 which is the last free program, and you can verify
it. It works well with VAC 4.x
Chas, WiCG
At 11:25 AM 4/28/2007, Tim Ellison wrote:
-
Integrated Technical Services
--
*From:* [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] *On
Behalf Of *Frank Brickle
*Sent:* Saturday, April 28, 2007 12:40 PM
*To:* Tim Ellison
*Cc:* flexradio@flex-radio.biz
*Subject:* Re: [Flexradio] PowerSDR filter shape factor
--
*From:* [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] *On
Behalf Of *Frank Brickle
*Sent:* Saturday, April 28, 2007 12:40 PM
*To:* Tim Ellison
*Cc:* flexradio@flex-radio.biz
*Subject:* Re: [Flexradio] PowerSDR filter shape factor?
On 4/28/07, Tim Ellison [EMAIL PROTECTED] wrote
--
*From:* [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] *On
Behalf Of *Frank Brickle
*Sent:* Saturday, April 28, 2007 12:40 PM
*To:* Tim Ellison
*Cc:* flexradio@flex-radio.biz
*Subject:* Re: [Flexradio] PowerSDR filter shape factor?
On 4/28/07, Tim Ellison [EMAIL PROTECTED
On 4/28/07, Robert McGwier [EMAIL PROTECTED] wrote:
We use Blackman-Harris windows for all the right reasons as the window
in the filter design. We care about the ultimate out of band rejection...
The only place I'd take exception to this is where you might not necessarily
want the steepest
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