Falconsat just went over
435.111 MHz to 435.095 MHz doppler corrected using MacDoppler CIV Main VFO FM 9k6 ON
Signalink USB hooked up to an ICOM 910H with 9k6 turned on and wired for 9k6
Sound modem HS ( High Speed ) set to FSK G3RUH 9600bd
Satellite heard once - too weak to decode - next pass is better
Confirmed system is working - can see 1k2 data in waterfall of sound modem
ETA 1.5 hours 90 Degrees
Andrew
On 12 Oct 2017, at 2:25 pm, Andrew Rich vk4tec@tech-software.net wrote:
I can confirm that the Signal link wired up as 9k6 transmits 1k2 fine
I just tested it
Andrew
On 12 Oct 2017, at 12:37 pm, christy hunter cchunter3@mindspring.com wrote:
thanks Andrew, will be interested to hear how it works. I can decode ok, but not thru the signalink. but it seems to not be practical anyway having to move the internal wire connector to use 9600. 73 christy kb6lty
On 10/11/2017 19:18, Andrew Rich wrote:
Twitter is flooded with Falconsat Reception reports as is my website
I watched Falconsat on SDR - It has a fair amount of doppler
I have a fully automated ICOM 910H with doppler correction sitting here hooked up to my Signalink having moved the internal jumper to 9k6
I await the bird
Andrew VK4TEC
On 12 Oct 2017, at 11:46 am, David W0DHB dave@w0dhb.net wrote:
Just looking at specs.
9.6 Khz baud packet needs (per G3RUH spec) •Response to DC •Response no worse than -4 db at 4.8 kHz •No worse than -10 db at 7.2 kHz
The Tigertronics spec's say audio response 300 Hz to 3.3KHz - ouch Depending on how quickly the audio response curve rolls off the Signallink is kind of iffy for 9.6K . Some folks have gotten it to work.
This outfit has an isolation transformer spec'ed 20 to 20KHz. A little pricey, but it is stereo so TX and RX audio are covered with a single unit
http://www.fullcompass.com/prod/097486-Radio-Design-Labs-AVHK1
For just RX, a dongle, HDSDR and hs_soundmodem do a great job .
Dave W0DHB
-----Original Message----- From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of christy hunter Sent: Wednesday, October 11, 2017 15:55 To: amsat-bb@amsat.org Subject: [amsat-bb] Signalink Modification for 9600 baud
based on discussion with a technician at Tigertronics, the USB signalink will not allow 9600 baud packet due to the frequency response is too narrow. He said none of the commercial external soundcards will work with 9600 bd packet. The only option is to construct a circuit, or use a 9600 baud TNC. (not too many options on that front.)
the Tigertronics website is a bit miss-leading because it ref. 9600 baud on its wiring diagram. Mine is setup for the 6pin miniDin connector(the pin 4 - for 9600 bd on my radio dataport- is not connected) for my FT 847. At this time I can only decode by connecting the 9600 pin on my radio (dataport) to a line-in to my Laptop soundcard (and not using a isolation circuit).
It would be nice to hear of any solution to this, without buying a $400 TNC (kantronics 9612).
there are several websites that talk to this issue, here is one of them
https://www.soundcardpacket.org/5modes.aspx
73 Christy KB6LTY
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