[amsat-bb] Signalink usb and UISS for 9600 baud packet

[Scott]

Hey Jack!

9600 baud packet requires something in the area of 15k of audio bandwidth
to work properly.  While I've heard from some folks that they've been able
to operate 9600 with a Signalink, here is the spec. from Signalink's
website:

------
Audio Freq Response: Approx. 300Hz - 3.3Khz @ 600 ohms
------

... so, as you can see it's perfectly suited for thinks like 1200 baud
packet or anything else that uses the traditional voice range up to 3k
(audio), but it's just not the "right tool" for 9600.

The other factor is the radio - for anyone else reading this, please be
sure to use a radio with a 9600-capable DATA port.  For the same reason
that the Signalink's audio bandwidth hampers operation at 9600 baud, on the
radio end of the connection you need a DATA port that works above the 3k
audio range.

Your computer's sound card might be fine but if you'd like to have a
dedicated sound device for interface to your radio's DATA port, I've had
great luck with this item:

https://www.amazon.com/gp/product/B003Y5D776

73!

-Scott,  K4KDR

==============================================

On Sun, Oct 7, 2018 at 1:21 PM alex weimer <ingejack at cox.net> wrote:

> I am running an Icom IC821H transceiver and the Signalink usb along with
> UISS software running the UX7HO High speed packet modem. However I can't
> seem to get this system to decode 9600 baud packet on falconsat-3 or  Elfin
> A or B satellites. Is anyone using this combination to decode or send
> packets through the Falconsat-3 digipeater on 9600 baud ??  I have tried
> varied jumper wire settings on the Signalink and can send and decode 1200
> baud packet with no problem. When trying 9600 baud the radio is set for
> 9600 baud using SET Mode but it still will not decode 9600 baud packets..
> Anybody out there have an answer ?? Thanks  JACK  KC7MG
>