[600MRG] Receiver bandwidth for WSPR

[Brian Pease]

But is WSPR really looking at noise outside the 200Hz WSPR band?  I have 
assumed that the software just looks at noise over a small bandwidth 
very close to each signal's frequency, then simply converts it to what 
it would be at 2500 Hz.  If it averaged the whole 2500Hz I.F. bandwidth 
then the 400Hz BW s/n numbers would be about 8dB better since the noise 
drops towards zero outside +/- 200Hz.
On 3/21/2014 9:08 AM, jrusgrove at comcast.net wrote:
> WSPR s/n measurements will be incorrect if the receiver bandwidth is 
> set to less than the expected SSB bandwidth.
>
> Jay W1VD  WD2XNS  WE2XGR/2
>
>
>
> ----- Original Message ----- From: "Brian Pease" 
> <bpease2 at myfairpoint.net>
> To: <600MRG at w7ekb.com>
> Sent: Friday, March 21, 2014 8:48 AM
> Subject: [600MRG] Receiver bandwidth for WSPR
>
>
>> I have found that my WSPR reception seems slightly better using the 
>> wide 3100Hz bandwidth on my HP3586C receiver compared to 400Hz. Have 
>> others tested this? My theory is that the static bursts reach the 
>> sound card sharp and crisp without the ringing from the narrow 
>> physical filter.  There should be no effect on the desired signals. 
>> The extra noise on other audio frequencies may not matter.  Of course 
>> it could be related to my particular man made 
>> noise.................................
>>
>> _______________________________________________
>> 600MRG mailing list
>> 600MRG at w7ekb.com
>> http://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com 
>
>
> _______________________________________________
> 600MRG mailing list
> 600MRG at w7ekb.com
> http://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com
>