nstants, and I
don't think it does that).
- Jeff, K6JCA
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Guy Olinger, K2AV
Sent: Wednesday, February 14, 2007 4:53 PM
To: Larry W8ER; [EMAIL PROTECTED]
Cc: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] Po
at might get you 10 dB or so better performance at
10 Hz out, say, -143 dBc/Hz, for those real eyelash of the bacteria
sitting on the gnat's eyelash kind of measurements.
>73, Guy.
>
>- Original Message -
>From: "Larry W8ER" <[EMAIL PROTECTED]>
>To:
al is?
73, Guy.
- Original Message -
From: "Larry W8ER" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Cc:
Sent: Wednesday, February 14, 2007 7:22 PM
Subject: Re: [Flexradio] PowerSDR "filter" bandwidth
> Mark,
>
> I would assume that you
Mark,
I measured the bandwidth of the narrow filters previously using
Spectrogram, a DSP and display program, and a RF noise generator. As
Eric pointed out, the largest DSP filters give the narrowest filter
widths. Using the FireBox at 48Ks/s, the 25 Hz filter was on the
order of 6o Hz at -6
Mark,
I would assume that you also turned off your AGC. I am surprised at your
figures. From what I hear, I would expect the filters to be much sharper
than that.
--Larry W8ER
Mark Amos wrote:
> Flexers,
>
> Has anyone done any actual measurements on filter bandwidth in PowerSDR -
> I've bee
At 02:23 PM 2/14/2007, Eric Wachsmann wrote:
>Mark,
>
>Make sure that you are using the largest _DSP_ Buffer size possible for the
>sharpest filters. 4096 is the max. Also, you will get sharper filters at
>lower sampling rates. 4096 @ 192kHz is about the same as 1024 @ 48kHz.
I would assume th
age-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
> radio.biz] On Behalf Of Mark Amos
> Sent: Wednesday, February 14, 2007 4:20 PM
> To: FlexRadio@flex-radio.biz
> Subject: [Flexradio] PowerSDR "filter" bandwidth
>
> Flexers,
>
> Has anyone done any ac
Flexers,
Has anyone done any actual measurements on filter bandwidth in PowerSDR - I've
been having an on-going discussion with a friend of mine on filter sharpness,
etc. - basically bragging about how tight the software filters are.
However, when I use a signal generator and measure the filter
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