[hpsdr] Pan adapter passband accuracy

[Scott Traurig]

I had a Flex-3000. The PowerSDR software client application provided by
Flex that ran that and the other legacy series Flex radios allowed a 10KHz
transmit passband (20KHz on AM).

The SmartSDR software client provided by Flex for the current day Flex
radios also allows 10KHz (20KHz on AM).

The software clients for openHPSDR architecture hardware, PowerSDR mRX PS
and Thetis, both allow 10KHz (20KHz on AM).

As far as I know there were no versions of the above applications that
limited the TX passband to 3KHz.

There are no regulations in the US that set limits on the bandwidth of
amateur radio phone signals except on 60M.

73,

Scott/w-u-2-o


On Mon, Apr 13, 2020 at 4:13 AM Willi Reppel <wi.re at telia.com> wrote:

>
> 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
>
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