Search found 9 matches

by f4exb
Fri Sep 13, 2019 3:07 pm
Forum: KerberosSDR
Topic: Feature requests / development ideas
Replies: 24
Views: 2702

Re: Feature requests / development ideas

Kerberos designers can correct me if I am wrong but if I got it right this is not like a power vs frequency calibration that you put in a table and update once in a while when some external condition (temperature...) changes. The 4 receivers have a common clock so they are coherent at a certain poin...
by f4exb
Sat Sep 07, 2019 11:08 pm
Forum: KerberosSDR
Topic: Image v1.4 on RPi3B+ does not work.
Replies: 6
Views: 633

Re: Image v1.4 on RPi3B+ does not work.

Hi, this is fully understood and I think the hardware is great. I still went far enough to see it is actually working. The idea of having an embedded noise source and the careful crafting of couplers is essential to make interferometry affordable to the masses. It is also great that the software is ...
by f4exb
Sat Sep 07, 2019 7:23 am
Forum: KerberosSDR
Topic: Feature requests / development ideas
Replies: 24
Views: 2702

Re: Feature requests / development ideas

Hi, I think it would be good to add a NCO to shift the effective reception center frequency anywhere in the 2 MHz or so passband of the RTLSDRs. This is motivated mostly because if you use only the passband around zero frequency and use the RTLSDR LO to tune to the signal of interest then you have t...
by f4exb
Fri Sep 06, 2019 9:45 pm
Forum: KerberosSDR
Topic: Image v1.4 on RPi3B+ does not work.
Replies: 6
Views: 633

Re: Image v1.4 on RPi3B+is useless

Hi, so... 8080 port has all the features and 8081 is for the DOA compass. So I could eventually use the web interface for control. However after some time trying either with the web interface or the Python host interface I eventually gave up. I am sorry but the software is not convenient whatsoever....
by f4exb
Fri Sep 06, 2019 4:15 pm
Forum: KerberosSDR
Topic: Image v1.4 on RPi3B+ does not work.
Replies: 6
Views: 633

Re: Image v1.4 on RPi3B+ yes it does work

Hi, thanks for the info but I am still confused about the web interface is the port 8080 or 8081? (I may try both anyway) I could not get to the page that shows all options I just had the DOA and Passive Radar links. Once the very first issues were solved I could have a quick check with a crude arra...
by f4exb
Fri Sep 06, 2019 11:51 am
Forum: KerberosSDR
Topic: Feasibility of a Passive Weather Radar
Replies: 11
Views: 2372

Re: Feasibility of a Passive Weather Radar

Hi, To explore higher frequencies one could imagine a set of 4 identical mixers and a common LO source and appropriate filters. The microwave LO and Kerberos LO would not be synchronized but this should not matter as the influence of the microwave LO will be identical on the 4 channels. It will be s...
by f4exb
Fri Sep 06, 2019 12:04 am
Forum: KerberosSDR
Topic: Image v1.4 on RPi3B+ does not work.
Replies: 6
Views: 633

Re: Image v1.4 on RPi3B+ works but may be improved.

Hi, Well eventually I could make it work. SSH daemon is not activated by default so with a keyboard and display connected to the Pi I could enable the ssh service (sudo systemctl enable ssh) so that it would start at boot up. I may suggest to have ssh service enabled by default in the next version o...
by f4exb
Thu Sep 05, 2019 7:35 pm
Forum: KerberosSDR
Topic: Image v1.4 on RPi3B+ does not work.
Replies: 6
Views: 633

Image v1.4 on RPi3B+ does not work.

Hello, I just flashed the .img file on a SD card plugged in the SD card connected Ethernet and Kerberos and applied power. The Rpi gets an IP address in my network and is reachable by ping. Howver I cannot conenct via ssh (Connection refused) and cannot reach the web application on port 8080 and I c...
by f4exb
Wed Sep 04, 2019 11:56 am
Forum: KerberosSDR
Topic: run it on rpi4
Replies: 7
Views: 1214

Re: run it on rpi4

Hello,
if you are running Raspbian then I think it is working in armv7 mode so the armv8 flags are irrelevant.
Brgds.