Thanks Heiner
Armin made me curious about those devices and i need something similar for a project. (not QO100 related)
73s
Thanks Heiner
Armin made me curious about those devices and i need something similar for a project. (not QO100 related)
73s
Here is some stuff about programming of that devices:
https://docs.rs-online.com/9aa2/0900766b812b3e93.pdf
Looks like those SI590s are programmed by the distributor (eg. Digikey) for your desired frequency.
Is that programming fixed or could it be changed later?
It would be nice if it is possible to use a uC to switch to different LO freqs.
73s
I use this ("Other") one:
http://www.dk2fd.de/uc2400_02.pdf
But mine model has an additional heat sink at the bottom side. It's a newer model I think.
HB9SKA: This upconverter is in the list > "DF Elektronik"
73s
Hello,
please take part in this survey:
73s DB8TF
see here > 13cm Filter 2,3 bis 2,4 GHz Abgleich WB - Transponder
Unfortunately the link is down but i can help, just send a PN.
73s DB8TF
@IK1HGI:
Just modify the config.ini
73s
Just observed a strange behaviour from Leila.
Leila activated at a strong carrier and "wanders" down in frequency even the carrier stays at the same freq.
After the carrier was gone Leila is still transmitting and wanders even lower in frequency.
73s DB8TF
Maybe it would be better to look for FT-8 packets not with "CQ" but some other text, eg. "RB" or so.
There are OMs who answer to those CQ calls and are getting no answer..
73s DB8TF
Hi Enrico
You beat me by 1dB.... REVENGE! HI
73s
Again QRM on 730
..and gone 12 UTC....
you can use the LDCP-Worker values to determine if your RX gets better.
If you tune to the Beacon you can see the values decrease with better reception.
Of course this values change also with the usage on the WBTP and the BW and your CPU Speed.
I optimised my RX system with help of that values (only beacon on the WBTP active!)
See attached picture.
i2NDT: the big C-MAC on the upper.
DB2OS: thanks Peter
As i see a similar drift (+/-20Hz) over 24h it is another confirmation that my reference OCXO works well.
Still have to solve the warming up problem of the RTL-SDR.
73s DB8TF
@ G0MRF :
the Y axis is the difference (Hz) of my RX relative to the 10.489,750MHz PSK beacon.
73s DB8TF
Here is a screenshot that shows the drift caused by the warming up RTL-SDR dongle. (with 0,5ppm TCXO)
73s DB8TF
Thanks in advance Geri