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Today's Topics:
1. Re: PSAT PSK31 experimental software (EMike McCardel)
2. Re: PSAT PSK31 experimental software (Graham Shirville)
3. Re: PSAT PSK31 experimental software (David W0DHB)
4. Re: PSAT PSK31 experimental software (KO6TZ Bob)
5. Re: PSAT PSK31 experimental software (David W0DHB)
6. Re: SO-50 (Neil Smith)
7. Re: SO-50 (Patrick STODDARD (WD9EWK/VA7EWK))
8. Re: SO-50 (Bryan Green)
9. Re: SO-50 (Bob- W7LRD)
10. Re: PSAT PSK31 experimental software (Joe)
11. Re: PSAT PSK31 experimental software (Joe)
----------------------------------------------------------------------
Message: 1
Date: Thu, 16 Jul 2015 10:45:59 -0400
From: EMike McCardel <mccardelm@xxxxx.xxx>
To: "aflowers@xxxxxxxxxxx.xxxx <andyk0sm@xxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] PSAT PSK31 experimental software
Message-ID: <93C12BA6-2EA9-4E49-8F86-2E513EBE6CED@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
This could make for a great AMSAT Journal article!
EMike
EMike McCardel, KC8YLD
VP for Educational Relations AMSAT-NA
Sent from my iPhone
> On Jul 16, 2015, at 8:28 AM, "aflowers@xxxxxxxxxxx.xxxx
<aflowers@xxxxxxxxxxx.xxx> wrote:
>
> Bob, Dave;
> That's great. I'm interested in how well it tracks when the satellite is
at a very high elevation and the Doppler is >3 Hz/s. I suspect the error is
going to be mostly in the estimates of the orbital elements, but we'll see.
I will try to join you on the pass when I can cobble together an uplink and
a downlink in the same place--probably next week sometime after I get back
from vacation.
>
> I think you should be able to share a sound device on most OS's, but I
have not tried. I assumed it would work on modern Windows OS's because of
the hardware abstraction. The program appears to run fine on OSX, but I
have not tried running CocoaModem or some other software next to it.
Ultimately I could also add a demodulator to the program itself, but that
will take some work....I know several hams have separate sound cards for
radio stuff, so I may need to add a device selection option in case the
system default (or whatever Java picks as the default) isn't what you want.
>
> The audio frequency displayed in DopplerPSK is the audio frequency being
send to the radio, not what you should expect in the passband of your
downlink receiver. The LO on PSAT is apparently a bit below 28120 KHz, so if
your radio was tuned to 28120 USB (suppressed carrier frequency) you would
expect to be a bit higher than 2000Hz in the FM passband:
>
>
http://www.urel.feec.vutbr.cz/esl/files/Projects/PSAT/P%20sat%20transponder%20
WEB%20spec02.htm
>
> In general, if you want to be lower in the passband I would lower your
transmitter RF frequency rather than the audio frequency going to the
transmitter. The reason being that if you have any non-linearity in the
audio chain you don't end up transmitting a harmonic higher in the band that
might bother someone else. Of course, you can probably see if this is an
issue or not since the satellite also serves as a crude signal analyzer :-)
I chose 2000 Hz as a center since at maximum Doppler of around 700 Hz, the
~2700 Hz tone should go through the transmitter's IF filter without too much
attenuation while keeping all the third harmonics and most of the time the
second harmonic above the cutoff of a 3 KHz IF filter. Every radio is a bit
different, however. You may find that the 1500Hz sweep in the program shows
you all your passband ripple in your IF filter :-)
>
> Since it works, I'm more motivated to improve the ergonomics of the
interface. Much of that depends on the unique operating practices of
satellite operation.
>
> Andy K0SM/2
>
>
>
>
> On Thursday, July 16, 2015 12:31 AM, KO6TZ Bob <my.callsign@xxxxxxx.xxx>
wrote:
>
>
> The software worked great !!! Produced a straight line on the waterfall
> for the down link.
>
> As expected, I was alone on the pass, so no opportunity for a contact.
>
> I was using digi-pan for the RX, my signal was at around 2200Hz..
> Probably an indication the oscillator in my radio is off a bit. I think
> I will lower the frequency from 2000 to about 1600. That will put my
> signal lower in the VF pass band.
>
> I like the program. Had good copy.
>
> THANKS.....
>
>
> BOB KO6TZ
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 2
Date: Thu, 16 Jul 2015 16:08:27 +0100
From: "Graham Shirville" <g.shirville@xxxxxxxxxx.xxx>
To: "EMike McCardel" <mccardelm@xxxxx.xxx>, "aflowers@xxxxxxxxxxx.xxxx
<andyk0sm@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSAT PSK31 experimental software
Message-ID: <9DA56CC8A7FC4274A2C807E513C2A39D@xxxxxxx.xxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
And for OSCAR NEWS :)
73
Graham
G3VZV
-----Original Message-----
From: EMike McCardel
Sent: Thursday, July 16, 2015 3:45 PM
To: aflowers@xxxxxxxxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSAT PSK31 experimental software
This could make for a great AMSAT Journal article!
EMike
EMike McCardel, KC8YLD
VP for Educational Relations AMSAT-NA
Sent from my iPhone
> On Jul 16, 2015, at 8:28 AM, "aflowers@xxxxxxxxxxx.xxxx
> <aflowers@xxxxxxxxxxx.xxx> wrote:
>
> Bob, Dave;
> That's great. I'm interested in how well it tracks when the satellite is
> at a very high elevation and the Doppler is >3 Hz/s. I suspect the error
> is going to be mostly in the estimates of the orbital elements, but we'll
> see. I will try to join you on the pass when I can cobble together an
> uplink and a downlink in the same place--probably next week sometime after
> I get back from vacation.
>
> I think you should be able to share a sound device on most OS's, but I
> have not tried. I assumed it would work on modern Windows OS's because of
> the hardware abstraction. The program appears to run fine on OSX, but I
> have not tried running CocoaModem or some other software next to it.
> Ultimately I could also add a demodulator to the program itself, but that
> will take some work....I know several hams have separate sound cards for
> radio stuff, so I may need to add a device selection option in case the
> system default (or whatever Java picks as the default) isn't what you
> want.
>
> The audio frequency displayed in DopplerPSK is the audio frequency being
> send to the radio, not what you should expect in the passband of your
> downlink receiver. The LO on PSAT is apparently a bit below 28120 KHz, so
> if your radio was tuned to 28120 USB (suppressed carrier frequency) you
> would expect to be a bit higher than 2000Hz in the FM passband:
>
>
http://www.urel.feec.vutbr.cz/esl/files/Projects/PSAT/P%20sat%20transponder%20
WEB%20spec02.htm
>
> In general, if you want to be lower in the passband I would lower your
> transmitter RF frequency rather than the audio frequency going to the
> transmitter. The reason being that if you have any non-linearity in the
> audio chain you don't end up transmitting a harmonic higher in the band
> that might bother someone else. Of course, you can probably see if this
> is an issue or not since the satellite also serves as a crude signal
> analyzer :-) I chose 2000 Hz as a center since at maximum Doppler of
> around 700 Hz, the ~2700 Hz tone should go through the transmitter's IF
> filter without too much attenuation while keeping all the third harmonics
> and most of the time the second harmonic above the cutoff of a 3 KHz IF
> filter. Every radio is a bit different, however. You may find that the
> 1500Hz sweep in the program shows you all your passband ripple in your IF
> filter :-)
>
> Since it works, I'm more motivated to improve the ergonomics of the
> interface. Much of that depends on the unique operating practices of
> satellite operation.
>
> Andy K0SM/2
>
>
>
>
> On Thursday, July 16, 2015 12:31 AM, KO6TZ Bob <my.callsign@xxxxxxx.xxx>
> wrote:
>
>
> The software worked great !!! Produced a straight line on the waterfall
> for the down link.
>
> As expected, I was alone on the pass, so no opportunity for a contact.
>
> I was using digi-pan for the RX, my signal was at around 2200Hz..
> Probably an indication the oscillator in my radio is off a bit. I think
> I will lower the frequency from 2000 to about 1600. That will put my
> signal lower in the VF pass band.
>
> I like the program. Had good copy.
>
> THANKS.....
>
>
> BOB KO6TZ
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions
expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 3
Date: Thu, 16 Jul 2015 13:57:49 -0600
From: "David W0DHB" <dave@xxxxx.xxx>
To: "'aflowers@xxxxxxxxxxx.xxxxx <andyk0sm@xxxxx.xxx>,
<amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] PSAT PSK31 experimental software
Message-ID: <001501d0c001$b1d2b1e0$157815a0$@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Andy
Here is a recording of the 1930 pass of NO-84
https://www.dropbox.com/s/2qtb5d2cm3ktrr0/FM%20435.359944MHz%20%5B12k%5D%207
-16-2015%2019%2033%2052.wav?dl=0
Bob KO6TZ and I had a successful QSO. My audio was set at 1500 Uplink
frequency of 28.119700 MHz .
The signals seemed to be stable, decoding at my end (DM780 ) was not
stellar, I'm running the recording through fldigi, MixW and Digipan to see
if it's any better.
Dave W0DHB
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of David W0DHB
Sent: Thursday, July 16, 2015 8:41 AM
To: 'aflowers@xxxxxxxxxxx.xxxxx amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSAT PSK31 experimental software
Hey Andy
The ability to select soundcard would be helpful. In my setup TX audio is
fed by a virtual audio cable set to match the 48K sample rate that
DopplerPSK is using.
Folks using windows should set the recording device side of their soundcard
to a 48K sample rate (it usually defaults to 44.1K).
You are correct that the uplink frequency is high, I apply a -300 Hz
calibration offset.
Thanks for all your work on this.
Dave W0DHB
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of
aflowers@xxxxxxxxxxx.xxx
Sent: Thursday, July 16, 2015 6:29 AM
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSAT PSK31 experimental software
Bob, Dave;
That's great. I'm interested in how well it tracks when the satellite is at
a very high elevation and the Doppler is >3 Hz/s. I suspect the error is
going to be mostly in the estimates of the orbital elements, but we'll see.
I will try to join you on the pass when I can cobble together an uplink and
a downlink in the same place--probably next week sometime after I get back
from vacation.
I think you should be able to share a sound device on most OS's, but I have
not tried. I assumed it would work on modern Windows OS's because of the
hardware abstraction. The program appears to run fine on OSX, but I have
not tried running CocoaModem or some other software next to it. Ultimately
I could also add a demodulator to the program itself, but that will take
some work....I know several hams have separate sound cards for radio stuff,
so I may need to add a device selection option in case the system default
(or whatever Java picks as the default) isn't what you want.
The audio frequency displayed in DopplerPSK is the audio frequency being
send to the radio, not what you should expect in the passband of your
downlink receiver. The LO on PSAT is apparently a bit below 28120 KHz, so if
your radio was tuned to 28120 USB (suppressed carrier frequency) you would
expect to be a bit higher than 2000Hz in the FM passband:
http://www.urel.feec.vutbr.cz/esl/files/Projects/PSAT/P%20sat%20transponder%
20WEB%20spec02.htm
In general, if you want to be lower in the passband I would lower your
transmitter RF frequency rather than the audio frequency going to the
transmitter. The reason being that if you have any non-linearity in the
audio chain you don't end up transmitting a harmonic higher in the band that
might bother someone else. Of course, you can probably see if this is an
issue or not since the satellite also serves as a crude signal analyzer :-)
I chose 2000 Hz as a center since at maximum Doppler of around 700 Hz, the
~2700 Hz tone should go through the transmitter's IF filter without too much
attenuation while keeping all the third harmonics and most of the time the
second harmonic above the cutoff of a 3 KHz IF filter. Every radio is a bit
different, however. You may find that the 1500Hz sweep in the program shows
you all your passband ripple in your IF filter :-)
Since it works, I'm more motivated to improve the ergonomics of the
interface. Much of that depends on the unique operating practices of
satellite operation.
Andy K0SM/2
On Thursday, July 16, 2015 12:31 AM, KO6TZ Bob <my.callsign@xxxxxxx.xxx>
wrote:
The software worked great !!! Produced a straight line on the waterfall for
the down link.
As expected, I was alone on the pass, so no opportunity for a contact.
I was using digi-pan for the RX, my signal was at around 2200Hz..
Probably an indication the oscillator in my radio is off a bit. I think I
will lower the frequency from 2000 to about 1600. That will put my signal
lower in the VF pass band.
I like the program. Had good copy.
THANKS.....
BOB KO6TZ
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Thu, 16 Jul 2015 13:17:22 -0700
From: KO6TZ Bob <my.callsign@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSAT PSK31 experimental software
Message-ID: <55A81152.8010004@xxxxxxx.xxx>
Content-Type: text/plain; CHARSET=US-ASCII; format=flowed
I made a successful contact with Dave W0DHB on the 19:35u pass of
NO-84. It was hard copy, chock it up to band conditions I guess. There
was a pulsing noise and fade, probably on the 10m up link.
BOB KO6TZ
------------------------------
Message: 5
Date: Thu, 16 Jul 2015 14:34:16 -0600
From: "David W0DHB" <dave@xxxxx.xxx>
To: "'KO6TZ Bob'" <my.callsign@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] PSAT PSK31 experimental software
Message-ID: <001a01d0c006$c9512720$5bf37560$@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Playing back the recording I agree with Bob there was pulsing and fading
that can be seen with the recording .
Bob gets into the bird better than I do, I'm going to try 10m tuned 80m
dipole next time.
I have refined the uplink offset it's close to -275 Hz . If your Uplink freq
is 28.119725 your downlink center frequency should match your uplink center
frequency.
The DopplerPSK program simplifies operating NO-84 greatly.
Thanks for putting this together Andy.
Dave W0DHB
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of KO6TZ Bob
Sent: Thursday, July 16, 2015 2:17 PM
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSAT PSK31 experimental software
I made a successful contact with Dave W0DHB on the 19:35u pass of NO-84. It
was hard copy, chock it up to band conditions I guess. There was a pulsing
noise and fade, probably on the 10m up link.
BOB KO6TZ
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 6
Date: Thu, 16 Jul 2015 14:50:01 -0700
From: Neil Smith <n5eil@xx.xxx>
To: Bill Dillon <bill.g.dillon@xxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] SO-50
Message-ID: <E7C2B6F3-D8DB-404E-8D40-3019492867AF@xx.xxx>
Content-Type: text/plain; charset=utf-8
Was anyone able to work the 1902 UTC west coast pass? It was coming in from
the southeast over the pacific, so I figured it might not be turned on, but
I expected to hear some traffic on it by the end of the pass. When it?s off
and needs the 74.4hz 2 second tone to reset the timer does so-50 give any
feedback to indicate that?s it?s now on?
-Neil N5EIL
> On Jul 16, 2015, at 6:40 AM, Bill Dillon <bill.g.dillon@xxxxx.xxx> wrote:
>
> I had no trouble on the following 05:15-05:30 UT pass.
>
> 73,
>
> --Bill, KG5FQX
>
> On Wed, Jul 15, 2015 at 10:45 PM, Lee Ernstrom <lee.ernstrom@xxxxxxxx.xxx>
> wrote:
>
>> On the 0330-0341 pass of SO-50 this evening, Wednesday, I couldn't get it
>> to come to life. Was it just me? Did I lose my pre-amp or was there
>> something wrong with the sat?
>>
>> Lee (Doc) Ernstrom
>> Syracuse, Utah DN-31
>>
>> Sent from my iPad
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership. Opinions
>> expressed
>> are solely those of the author, and do not reflect the official views of
>> AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 7
Date: Thu, 16 Jul 2015 14:59:44 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] SO-50
Message-ID:
<CAN6TEUeOhnMUf0jca-CcBvggfJ=iWAssJxNbMpzqogWVbLEHaw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Neil,
There is no feedback from SO-50 when you send the 74.4 Hz tone on the
uplink. You only have feedback after sending the 74.4 Hz tone when you
switch back to the 67.0 Hz tone and transmit through the satellite (as long
as you are working full-duplex), or when you hear another station transmitting
through the satellite with the 67.0 Hz tone.
Good luck, and 73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
Twitter: @xxxxxx
On Thu, Jul 16, 2015 at 2:50 PM, Neil Smith <n5eil@xx.xxx> wrote:
> Was anyone able to work the 1902 UTC west coast pass? It was coming in
from the southeast over the pacific, so I figured it might not be turned on,
but I expected to hear some traffic on it by the end of the pass. When it?s
off and needs the 74.4hz 2 second tone to reset the timer does so-50 give
any feedback to indicate that?s it?s now on?
>
> -Neil N5EIL
------------------------------
Message: 8
Date: Thu, 16 Jul 2015 15:00:45 -0700
From: Bryan Green <bryan@xxxxx.xxx>
To: Neil Smith <n5eil@xx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] SO-50
Message-ID: <5BB2540E-2DEC-481B-BB7B-C8E8116D58D0@xxxxx.xxx>
Content-Type: text/plain; charset=windows-1251
I've turned it on plenty of times from a western approach. Usually it takes
a good 5 second burst of carrier at 74.4 Hz. The only way to tell is to
switch back to 67 Hz and send a carrier. If you hear quieting, it's on.
Bryan KL7CN/W6
Sent from my iPhone
> On Jul 16, 2015, at 14:50, Neil Smith <n5eil@xx.xxx> wrote:
>
> Was anyone able to work the 1902 UTC west coast pass? It was coming in
from the southeast over the pacific, so I figured it might not be turned on,
but I expected to hear some traffic on it by the end of the pass. When it?s
off and needs the 74.4hz 2 second tone to reset the timer does so-50 give
any feedback to indicate that?s it?s now on?
>
> -Neil N5EIL
>
>
>> On Jul 16, 2015, at 6:40 AM, Bill Dillon <bill.g.dillon@xxxxx.xxx> wrote:
>>
>> I had no trouble on the following 05:15-05:30 UT pass.
>>
>> 73,
>>
>> --Bill, KG5FQX
>>
>> On Wed, Jul 15, 2015 at 10:45 PM, Lee Ernstrom <lee.ernstrom@xxxxxxxx.xxx>
>> wrote:
>>
>>> On the 0330-0341 pass of SO-50 this evening, Wednesday, I couldn't get it
>>> to come to life. Was it just me? Did I lose my pre-amp or was there
>>> something wrong with the sat?
>>>
>>> Lee (Doc) Ernstrom
>>> Syracuse, Utah DN-31
>>>
>>> Sent from my iPad
>>> _______________________________________________
>>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>>> to all interested persons worldwide without requiring membership. Opinions
>>> expressed
>>> are solely those of the author, and do not reflect the official views of
>>> AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
Opinions expressed
>> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 9
Date: Thu, 16 Jul 2015 22:17:41 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
To: Bryan Green <bryan@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] SO-50
Message-ID:
<173450589.12959912.1437085061035.JavaMail.zimbra@xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
likewise I have turned it on some W. Coast passes
73 Bob W7LRD
----- Original Message -----
From: "Bryan Green" <bryan@xxxxx.xxx>
To: "Neil Smith" <n5eil@xx.xxx>
Cc: amsat-bb@xxxxx.xxx
Sent: Thursday, July 16, 2015 3:00:45 PM
Subject: Re: [amsat-bb] SO-50
I've turned it on plenty of times from a western approach. Usually it takes
a good 5 second burst of carrier at 74.4 Hz. The only way to tell is to
switch back to 67 Hz and send a carrier. If you hear quieting, it's on.
Bryan KL7CN/W6
Sent from my iPhone
> On Jul 16, 2015, at 14:50, Neil Smith <n5eil@xx.xxx> wrote:
>
> Was anyone able to work the 1902 UTC west coast pass? It was coming in
from the southeast over the pacific, so I figured it might not be turned on,
but I expected to hear some traffic on it by the end of the pass. When it?s
off and needs the 74.4hz 2 second tone to reset the timer does so-50 give
any feedback to indicate that?s it?s now on?
>
> -Neil N5EIL
>
>
>> On Jul 16, 2015, at 6:40 AM, Bill Dillon <bill.g.dillon@xxxxx.xxx> wrote:
>>
>> I had no trouble on the following 05:15-05:30 UT pass.
>>
>> 73,
>>
>> --Bill, KG5FQX
>>
>> On Wed, Jul 15, 2015 at 10:45 PM, Lee Ernstrom <lee.ernstrom@xxxxxxxx.xxx>
>> wrote:
>>
>>> On the 0330-0341 pass of SO-50 this evening, Wednesday, I couldn't get it
>>> to come to life. Was it just me? Did I lose my pre-amp or was there
>>> something wrong with the sat?
>>>
>>> Lee (Doc) Ernstrom
>>> Syracuse, Utah DN-31
>>>
>>> Sent from my iPad
>>> _______________________________________________
>>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>>> to all interested persons worldwide without requiring membership. Opinions
>>> expressed
>>> are solely those of the author, and do not reflect the official views of
>>> AMSAT-NA.
>>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
Opinions expressed
>> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
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expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Thu, 16 Jul 2015 17:20:38 -0500
From: Joe <nss@xxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSAT PSK31 experimental software
Message-ID: <55A82E36.8010700@xxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
What is the station equipment, antennas etc.
Joe WB9SBD
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 7/16/2015 2:57 PM, David W0DHB wrote:
> Andy
>
> Here is a recording of the 1930 pass of NO-84
> https://www.dropbox.com/s/2qtb5d2cm3ktrr0/FM%20435.359944MHz%20%5B12k%5D%207
> -16-2015%2019%2033%2052.wav?dl=0
>
> Bob KO6TZ and I had a successful QSO. My audio was set at 1500 Uplink
> frequency of 28.119700 MHz .
>
> The signals seemed to be stable, decoding at my end (DM780 ) was not
> stellar, I'm running the recording through fldigi, MixW and Digipan to see
> if it's any better.
>
> Dave W0DHB
>
> -----Original Message-----
> From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of David W0DHB
> Sent: Thursday, July 16, 2015 8:41 AM
> To: 'aflowers@xxxxxxxxxxx.xxxxx amsat-bb@xxxxx.xxx
> Subject: Re: [amsat-bb] PSAT PSK31 experimental software
>
> Hey Andy
>
> The ability to select soundcard would be helpful. In my setup TX audio is
> fed by a virtual audio cable set to match the 48K sample rate that
> DopplerPSK is using.
> Folks using windows should set the recording device side of their soundcard
> to a 48K sample rate (it usually defaults to 44.1K).
>
> You are correct that the uplink frequency is high, I apply a -300 Hz
> calibration offset.
>
> Thanks for all your work on this.
>
> Dave W0DHB
>
> -----Original Message-----
> From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of
> aflowers@xxxxxxxxxxx.xxx
> Sent: Thursday, July 16, 2015 6:29 AM
> To: amsat-bb@xxxxx.xxx
> Subject: Re: [amsat-bb] PSAT PSK31 experimental software
>
> Bob, Dave;
> That's great. I'm interested in how well it tracks when the satellite is at
> a very high elevation and the Doppler is >3 Hz/s. I suspect the error is
> going to be mostly in the estimates of the orbital elements, but we'll see.
> I will try to join you on the pass when I can cobble together an uplink and
> a downlink in the same place--probably next week sometime after I get back
> from vacation.
>
> I think you should be able to share a sound device on most OS's, but I have
> not tried. I assumed it would work on modern Windows OS's because of the
> hardware abstraction. The program appears to run fine on OSX, but I have
> not tried running CocoaModem or some other software next to it. Ultimately
> I could also add a demodulator to the program itself, but that will take
> some work....I know several hams have separate sound cards for radio stuff,
> so I may need to add a device selection option in case the system default
> (or whatever Java picks as the default) isn't what you want.
>
> The audio frequency displayed in DopplerPSK is the audio frequency being
> send to the radio, not what you should expect in the passband of your
> downlink receiver. The LO on PSAT is apparently a bit below 28120 KHz, so if
> your radio was tuned to 28120 USB (suppressed carrier frequency) you would
> expect to be a bit higher than 2000Hz in the FM passband:
>
> http://www.urel.feec.vutbr.cz/esl/files/Projects/PSAT/P%20sat%20transponder%
> 20WEB%20spec02.htm
>
> In general, if you want to be lower in the passband I would lower your
> transmitter RF frequency rather than the audio frequency going to the
> transmitter. The reason being that if you have any non-linearity in the
> audio chain you don't end up transmitting a harmonic higher in the band that
> might bother someone else. Of course, you can probably see if this is an
> issue or not since the satellite also serves as a crude signal analyzer :-)
> I chose 2000 Hz as a center since at maximum Doppler of around 700 Hz, the
> ~2700 Hz tone should go through the transmitter's IF filter without too much
> attenuation while keeping all the third harmonics and most of the time the
> second harmonic above the cutoff of a 3 KHz IF filter. Every radio is a bit
> different, however. You may find that the 1500Hz sweep in the program shows
> you all your passband ripple in your IF filter :-)
>
> Since it works, I'm more motivated to improve the ergonomics of the
> interface. Much of that depends on the unique operating practices of
> satellite operation.
>
> Andy K0SM/2
>
>
>
>
> On Thursday, July 16, 2015 12:31 AM, KO6TZ Bob <my.callsign@xxxxxxx.xxx>
> wrote:
>
>
> The software worked great !!! Produced a straight line on the waterfall for
> the down link.
>
> As expected, I was alone on the pass, so no opportunity for a contact.
>
> I was using digi-pan for the RX, my signal was at around 2200Hz..
> Probably an indication the oscillator in my radio is off a bit. I think I
> will lower the frequency from 2000 to about 1600. That will put my signal
> lower in the VF pass band.
>
> I like the program. Had good copy.
>
> THANKS.....
>
>
> BOB KO6TZ
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
> interested persons worldwide without requiring membership. Opinions
> expressed are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
> interested persons worldwide without requiring membership. Opinions
> expressed are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
> interested persons worldwide without requiring membership. Opinions
> expressed are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
>
------------------------------
Message: 11
Date: Thu, 16 Jul 2015 17:24:06 -0500
From: Joe <nss@xxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSAT PSK31 experimental software
Message-ID: <55A82F06.4030804@xxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
hEDRE i FIXED THAT url ALSO,
*http://tinyurl.com/q3np2sm
Joe
*
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 7/16/2015 2:57 PM, David W0DHB wrote:
> Andy
>
> Here is a recording of the 1930 pass of NO-84
> https://www.dropbox.com/s/2qtb5d2cm3ktrr0/FM%20435.359944MHz%20%5B12k%5D%207
> -16-2015%2019%2033%2052.wav?dl=0
>
> Bob KO6TZ and I had a successful QSO. My audio was set at 1500 Uplink
> frequency of 28.119700 MHz .
>
> The signals seemed to be stable, decoding at my end (DM780 ) was not
> stellar, I'm running the recording through fldigi, MixW and Digipan to see
> if it's any better.
>
> Dave W0DHB
>
> -----Original Message-----
> From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of David W0DHB
> Sent: Thursday, July 16, 2015 8:41 AM
> To: 'aflowers@xxxxxxxxxxx.xxxxx amsat-bb@xxxxx.xxx
> Subject: Re: [amsat-bb] PSAT PSK31 experimental software
>
> Hey Andy
>
> The ability to select soundcard would be helpful. In my setup TX audio is
> fed by a virtual audio cable set to match the 48K sample rate that
> DopplerPSK is using.
> Folks using windows should set the recording device side of their soundcard
> to a 48K sample rate (it usually defaults to 44.1K).
>
> You are correct that the uplink frequency is high, I apply a -300 Hz
> calibration offset.
>
> Thanks for all your work on this.
>
> Dave W0DHB
>
> -----Original Message-----
> From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of
> aflowers@xxxxxxxxxxx.xxx
> Sent: Thursday, July 16, 2015 6:29 AM
> To: amsat-bb@xxxxx.xxx
> Subject: Re: [amsat-bb] PSAT PSK31 experimental software
>
> Bob, Dave;
> That's great. I'm interested in how well it tracks when the satellite is at
> a very high elevation and the Doppler is >3 Hz/s. I suspect the error is
> going to be mostly in the estimates of the orbital elements, but we'll see.
> I will try to join you on the pass when I can cobble together an uplink and
> a downlink in the same place--probably next week sometime after I get back
> from vacation.
>
> I think you should be able to share a sound device on most OS's, but I have
> not tried. I assumed it would work on modern Windows OS's because of the
> hardware abstraction. The program appears to run fine on OSX, but I have
> not tried running CocoaModem or some other software next to it. Ultimately
> I could also add a demodulator to the program itself, but that will take
> some work....I know several hams have separate sound cards for radio stuff,
> so I may need to add a device selection option in case the system default
> (or whatever Java picks as the default) isn't what you want.
>
> The audio frequency displayed in DopplerPSK is the audio frequency being
> send to the radio, not what you should expect in the passband of your
> downlink receiver. The LO on PSAT is apparently a bit below 28120 KHz, so if
> your radio was tuned to 28120 USB (suppressed carrier frequency) you would
> expect to be a bit higher than 2000Hz in the FM passband:
>
> http://www.urel.feec.vutbr.cz/esl/files/Projects/PSAT/P%20sat%20transponder%
> 20WEB%20spec02.htm
>
> In general, if you want to be lower in the passband I would lower your
> transmitter RF frequency rather than the audio frequency going to the
> transmitter. The reason being that if you have any non-linearity in the
> audio chain you don't end up transmitting a harmonic higher in the band that
> might bother someone else. Of course, you can probably see if this is an
> issue or not since the satellite also serves as a crude signal analyzer :-)
> I chose 2000 Hz as a center since at maximum Doppler of around 700 Hz, the
> ~2700 Hz tone should go through the transmitter's IF filter without too much
> attenuation while keeping all the third harmonics and most of the time the
> second harmonic above the cutoff of a 3 KHz IF filter. Every radio is a bit
> different, however. You may find that the 1500Hz sweep in the program shows
> you all your passband ripple in your IF filter :-)
>
> Since it works, I'm more motivated to improve the ergonomics of the
> interface. Much of that depends on the unique operating practices of
> satellite operation.
>
> Andy K0SM/2
>
>
>
>
> On Thursday, July 16, 2015 12:31 AM, KO6TZ Bob <my.callsign@xxxxxxx.xxx>
> wrote:
>
>
> The software worked great !!! Produced a straight line on the waterfall for
> the down link.
>
> As expected, I was alone on the pass, so no opportunity for a contact.
>
> I was using digi-pan for the RX, my signal was at around 2200Hz..
> Probably an indication the oscillator in my radio is off a bit. I think I
> will lower the frequency from 2000 to about 1600. That will put my signal
> lower in the VF pass band.
>
> I like the program. Had good copy.
>
> THANKS.....
>
>
> BOB KO6TZ
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
> interested persons worldwide without requiring membership. Opinions
> expressed are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
> interested persons worldwide without requiring membership. Opinions
> expressed are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
> interested persons worldwide without requiring membership. Opinions
> expressed are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
>
>
------------------------------
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_______________________________________________
Sent via amsat-bb@xxxxx.xxx.
AMSAT-NA makes this open forum available to all interested persons worldwide
without requiring membership. Opinions expressed
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AMSAT-NA.
Not an AMSAT member? Join now to support the amateur satellite program!
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