Архив за 10.10.2019

ADALM PLUTO with Express DVB TX test DVB-T [00:02:22]

Phantom 3 drone signature

Hi guys.

My neighbour is flying a Phantom 3 drone around, but I can't really distinguish it from all the WiFi signals in the area.

We'd like to hear if anyone has a screenshot of the waterfall while listening to the phantom 3 drone.

submitted by /u/FnuSNU2000
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RTL-SDR Discussion • Re: SDR has clear strong signal, 2 Meter ham rig has bad signal using same antenna

My first thought is that your TR7400 is faulty.
It would be the first time a RTL was better than a good proper radio.
Alan

Statistics: Posted by alanzfq — Thu Oct 10, 2019 8:46 pm


Need help figuring out RTLSDR on Raspi4

I recently got my first raspberry pi and a RTLSDR and im trying to get them to work together, but it doesnt seem to get recognised.

submitted by /u/raghavbs
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RTL-SDR Discussion • SDR has clear strong signal, 2 Meter ham rig has bad signal using same antenna

I have an RTL SDR and a Kenwood tr 7400a 2 meter ham radio. Using the same antenna in the same location, the SDR gets a clear full quieting strong reception of my local 2 meter repeater. The ham rig gets a low, bad, staticy reception but good full quieting transmission into the repeater. The gain on the SDR is at full +49db. How can I made the ham radio get the same reception as the SDR? I cannot adjust the gain on the ham radio I don't think.

Statistics: Posted by KM4OVZ — Thu Oct 10, 2019 4:54 pm


Comment on Buy RTL-SDR Dongles (RTL2832U) by Bourdin Henri

Hi! I just received the item ordered in Amazon usa here in France. Very wuick delivery! Great. But I just received 1 small antenna instead of 2. How do I proceed? It is not possible to claim from here in France (why not? …) so, how do I proceed?
best regards Henri

Comment on Buy RTL-SDR Dongles (RTL2832U) by Bourdin Henri

Hi! I just received the item ordered in Amazon usa here in France. Very wuick delivery! Great. But I just received 1 small antenna instead of 2. How do I proceed? It is not possible to claim from here in France (why not? …) so, who do I proceed?
best regards Henri

Comment on Buy RTL-SDR Dongles (RTL2832U) by Henri Bourdin

Hi! I just received the sdr v3 I ordered in Amazon.usa here in France. Great! Very rapid! But… I received 2 big antennas and only 1 small antenna. Your advertisement shows 2 big and 2 small. How can I do?
Best regards
Henri

Troubleshooting Help • Re: High-pass filter characteristics for RTL-SDR.com ADS-B filtered amp?

Yes, I understand that SAW filters are bandpass. That's why I plan to replace the 1090MHz SAW filters with 978MHz SAW filters (which I have a partial reel of). What I'm looking for is information on the highpass filter on the RF input of the rtl-sdr.com ADS-B filtered LNA, which is advertised as having a HPF in front of the first LNA stage, then SAW filters after the first and second LNA stages.
https://www.rtl-sdr.com/new-product-rtl ... ads-b-lna/
"In the LNA signal path there is first a low insertion loss high pass filter that reduces the strength of any broadcast FM, TV, pager or other similar signals that are usually extremely strong. Then in between the first and second stage of the LNA is a SAW filter tuned for 1090 MHz. A second SAW filter sits on the output of the LNA."

I want to know if THAT filter cuts off 978MHz, or if the passband includes 978MHz.

Statistics: Posted by ExplodingLemur — Thu Oct 10, 2019 4:32 pm


Troubleshooting Help • Re: SDR# no device selected

The corresponding behavior of SDR# is that:
on USB cable insertion into the USB port (any), if I press the "Start" button on the SDR# interface it says "1 compatible devices have been found but are all busy".
Then if I press "Start" again it says "No device selected".
I'm going to try on another PC I have, just to verify if it is a hardware-related problem.

Best regards

Statistics: Posted by radioquaderno — Thu Oct 10, 2019 4:13 pm


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