Search found 192 matches

by DanubeBCL
Sun Mar 12, 2017 12:15 pm
Forum: General
Topic: Interference identification?
Replies: 37
Views: 17007

Re: Interference identification?

If I understand well, jpsa posted an image of an idle modem, I am not yet sure. That depends on the distance to your neighbour, the infrastructure in his house (wire resonances and line attenuation, distance between his two PLC-wallplugs a.s.o). For me it is a modem in normal operation being a bit ...
by DanubeBCL
Sun Mar 12, 2017 9:38 am
Forum: General
Topic: Interference identification?
Replies: 37
Views: 17007

Re: Interference identification?

Yes, PLC is working with on demand modulation. That means that idle PLC modems indeed make less noise. When data is transferred the modulation changes amplitudes rhythmically from almoust null to full within milliseconds. This is an obstacle when you want to null-phase the interference with a noise ...
by DanubeBCL
Sat Mar 11, 2017 4:12 pm
Forum: General
Topic: Interference identification?
Replies: 37
Views: 17007

Re: Interference identification?

The only thing you can do is to talk friendly to your neighbour and explain your hobby to him. He can easily distribute the internet in his house with other technologies like LAN cable or WLAN repeaters not based on powerline. In my case all talks were useless. I have nine neighbours in the meantime...
by DanubeBCL
Sat Mar 11, 2017 12:32 pm
Forum: General
Topic: Interference identification?
Replies: 37
Views: 17007

Re: Interference identification?

PS: From the answers in this post I see that the knowledge about PLC seems to be not very widespreed among members of this communinty. This astounds me because such interferences are every day business in urban areas (mostly in Europe, but such modems are sold elsewhere was well). Here I post an exc...
by DanubeBCL
Sat Mar 11, 2017 11:57 am
Forum: General
Topic: Interference identification?
Replies: 37
Views: 17007

Re: Interference identification?

This is a typical pattern of "Homeplug Powerline" (PLC/PLT) modems. They are used in millions of European households (and elsewhere, but Europe is the leader) and transport network data (mainly internet via WLAN extenders) through the mains lines in the house. According to the latest Europ...
by DanubeBCL
Sat Mar 11, 2017 11:40 am
Forum: SDRplay related
Topic: SDRplay and SDR sharp
Replies: 11
Views: 8916

Re: SDRplay and SDR sharp

anything that is a plug-in won't work. Write access to the plugin API functions is locked. Read access is mostly possible. That is: Third party plugins can readout settings but not change them. E. g. you can read the tuning frequency, but you cannot tune or set mode with third party plugins (like f...
by DanubeBCL
Fri Mar 10, 2017 7:28 pm
Forum: SDRplay related
Topic: SDRplay and SDR sharp
Replies: 11
Views: 8916

Re: SDRplay and SDR sharp

13dka wrote:The v2.2 ExtIO plug-in works only with SDR#v1411 and higher
SDR# has stopped ExtIO support a long time ago. SDR# Plugin – version 2.2 is not an ExtIO.dll, it's an SDR# frontend plugin. (With all the plugin restrictions for third party receivers in SDR#).
73, Heinrich
by DanubeBCL
Thu Mar 09, 2017 12:28 pm
Forum: SDRplay related
Topic: SDRSharp Zoom FFT not working at all
Replies: 5
Views: 3707

Re: SDRSharp Zoom FFT not working at all

You are aware that several functions in the SDR# plugin interface are locked intentionally for third party receivers which do not have the blessings of SDR#/airspy.com? The blessed reveivers are: Airspy HackRF RTL-SDRs FUNcubes pro and pro+ SoftRock RFSPACE SDR-IQ and Networked Radios All other rece...
by DanubeBCL
Mon Mar 06, 2017 8:38 am
Forum: SDR Antennas
Topic: Active loop build - construction questions
Replies: 8
Views: 6179

Re: Active loop build - construction questions

I cheated and had them rolled at place nearby with a hydraulic pipe bender :) Good work. Would a simple external attenuator help if this is the case? When overload is the cause a simple attenuator right at the receiver input should of course help. I often use a simple 470 Ohm pot for test purposes....
by DanubeBCL
Sun Mar 05, 2017 5:47 pm
Forum: SDR Antennas
Topic: Active loop build - construction questions
Replies: 8
Views: 6179

Re: Active loop build - construction questions

Nice circle shaped loops! How did you bend the material? I never get mine perfectly round shaped. I think you should place the antenna higher above ground to get better results with the dipole. The crossed loops should deliver appr. 2.5 dB more SNR for frequencies above appr. 14 MHz. For frequencies...

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