[hpsdr] Pan adapter passband accuracy

[Willi Reppel]

Hi Dean,
Sending from Sweden to "down under" my best wishes for your Happy Ester 
festivities.
The problem you report is well know to older users of HPSDR. In the 
beginning of Gerald Youngblood´s Software Radio programs, you  could choose 
all audio frequencies in SSB from zero to 10 kHz. I made short test QSOs 
with ham operators of my region here and they reported a FM-radio-like audio 
quality when  trans-mitting a short tune of musik with an audio bandwidth of 
10 kHz. However, the receiver of my illlegal transmission was asked to tune 
his bandwidth in recption to a maxi-mum.
Later on the US-authorities interfered and reminded Flex Radio Inc. to 
restrict the choice of audio bandwidth to
max 3000 Hz. They complied and in later versions of HPSDR software radio 
programs, the bandwidth became limited to the legal regulations in the US. 
Yet, may be  that some smart programmers change this part of HPSDR and 
allowing themselves a greater bandwidth again.
This is my guess work, but::What can be done will be done will be done by 
wizard programmers.
vy 73 gl es cuagn de
SM6OMH  Willi

---- Original Message ----- 
From: "Dean" <vk5lb at yahoo.com.au>
To: <hpsdr at openhpsdr.org>
Sent: Monday, April 13, 2020 6:20 AM
Subject: [hpsdr] Pan adapter passband accuracy


> ***** High Performance Software Defined Radio Discussion List *****
>
> Happy Easter to all,
>
> I see many signals on my panadapter that seem wider that 3KHz.
> They are usually strong signals but I am not sure the spectrum scope is 
> accurately reporting the received stations bandwidth.
> Any comments on spectrum scopes on HPSDR and in general such as on Icom 
> etc?
> I doubt their accuracy.  Very curious.
>
> Dean VK5LB.
>
> Sent from my iPad
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