[amsat-bb] unable to dig over ISS

[Scott]

To "CQ" via "ARISS" continues to work very well for the ISS digipeater.

73!

-Scott,  K4KDR

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

On Tue, May 19, 2020 at 2:05 PM D. Craig Fox via AMSAT-BB <
amsat-bb at amsat.org> wrote:

> Thanks Bob. Not sure but I seem to recall that sound modem has a tone
> calibration function which may allow me to do as you suggest.  I have
> regularly tried RS0ISS. Both ARISS and RS0ISS used to work fine for me.
>
> Craig
> N6RSX
>
> -----Original Message-----
> From: Robert Bruninga <bruninga at usna.edu>
> Sent: Tuesday, May 19, 2020 10:55 AM
> To: D. Craig Fox <DCFox at rwglaw.com>
> Cc: amsat-bb at amsat.org
> Subject: RE: [amsat-bb] unable to dig over ISS
>
> A series capacitor (experimental value until you hear the change in pitch
> on another radio) will boost the high tone.  A parallel cap to ground
> (experimental value) can reduce the high tone...
>
> ARISS reports that the ericcson radio on ISS is quite deaf and so needs to
> hear some power.  Also, they are not sure if the ARISS alias works.  Try
> RS0ISS.
>
> Bob
> bob
>
> -----Original Message-----
> From: D. Craig Fox <DCFox at rwglaw.com>
> Sent: Tuesday, May 19, 2020 1:20 PM
> To: 'Robert Bruninga' <bruninga at usna.edu>
> Cc: amsat-bb at amsat.org
> Subject: RE: [amsat-bb] unable to dig over ISS
>
> Thanks Bob! Maybe that is the issue. Now I just need to figure out how to
> analyze the tones being generated by my Signalink.
>
> Thank you and 73
>
> Craig
> N6RSX
>
> -----Original Message-----
> From: Robert Bruninga <bruninga at usna.edu>
> Sent: Tuesday, May 19, 2020 7:47 AM
> To: D. Craig Fox <DCFox at rwglaw.com>; amsat bb <amsat-bb at amsat.org>
> Subject: RE: [amsat-bb] unable to dig over ISS
>
> If the ISS radio is the Kenwood D700, it is quite sensitive to  unbalanced
> tones.  So your base station might work well with a local digi, but if the
> low tone is higher than the high tone by just a bit (or other way around),
> it will not be decoded by the D700.  This is because the kenwood is
> optimized for flat tones (at the discriminator) not pre-emphasized as most
> people do when they hook up an external TNC to the mic circuits.
>
> (I may have the tones reversed).  One of them can be higher than the other
> a bit and work fine.  The other way around it simply will not work.
> Bob
>
> -----Original Message-----
> From: AMSAT-BB <amsat-bb-bounces at amsat.org> On Behalf Of D. Craig Fox via
> AMSAT-BB
> Sent: Monday, May 18, 2020 6:18 PM
> To: 'k6vug at sbcglobal.net' <k6vug at sbcglobal.net>; amsat-bb at amsat.org
> Subject: Re: [amsat-bb] unable to dig over ISS
>
> Thanks Umesh. Well I would agree except that several nights ago I pulled
> out the D7 HT and elk, and digipeated numerous times on a nigh pass.
> Immediately went to the base station and tried but no dice. Plus, on every
> pass Ive tried on my base station, I see the stations I decoded show up on
> the ISS spotter. So it remains as issue at my end.
>
> Thank you
>
> Craig
> N6RSX
>
> From: k6vug at sbcglobal.net <k6vug at sbcglobal.net>
> Sent: Monday, May 18, 2020 2:22 PM
> To: amsat-bb at amsat.org; D. Craig Fox <DCFox at rwglaw.com>
> Subject: Re: [amsat-bb] unable to dig over ISS
>
> Looking at when the problem started, I'm assuming the problem is related
> to ISS turning off their packet systems regularly.
>
> Long ago I was able to operate ISS packet throughout the pass, even drop
> messages into their their BBS, etc., but for a considerable time now I have
> pretty much given up working with ISS packet.
>
> All other factors considered, the fact that your system gets ACK-ed on
> 144.390 is proof positive.  It has always been a guarantee to be able to
> work ISS packet.
>
> 73!
> Umesh,k6vug
>
>
>
>
>
> On Monday, May 18, 2020, 11:40:40 AM PDT, D. Craig Fox via AMSAT-BB <
> amsat-bb at amsat.org<mailto:amsat-bb at amsat.org>> wrote:
>
>
> Posting this as a last resort as I ordinarily enjoy doing my own
> troubleshooting, but this one has me perplexed. For normal sat ops I am
> running a TS2Kx, 5 el 2m and 11 el 70 cm Directive Systems yagis on a G5400.
> Doppler and rotor all run by SatPc32.  Up to about a year ago I ran AGWPE
> and UISS and a USB Signalink (through ACC 2) to dig over ISS. Never had a
> problem, except the occasional decode problem fixed by UX7HO Soundmodem. I
> finally removed AGWPE and began using Sound Modem with UISS.
> However, since then I have been unable to dig over ISS.  I decode just
> fine.
> My transmissions sound like normal packet transmissions, listening on a
> second receiver. I have used all of the online recommended settings for
> both Sound Modem and UISS. I have played with the audio levels. I
> substituted Signalinks in case that was the issue. Also, I have no problem
> sending APRS over 144.39 using different "wide" settings and getting an
> acknowledgement back. My "neighbor" Christy KB6LTY has provided mu ch
> assistance, but still no joy.  I am missing something. So I'm hoping
> someone has had a similar issue with a similar set up and can maybe send me
> screen shots of their settings that work, especially in Sound Modem.
> Or, any other suggestions would be greatly appreciated.
>
> Thank you in advance
>
> Craig
> N6RSX
>