Search found 61 matches

by alanzfq
Mon Nov 11, 2019 7:41 am
Forum: RTL-SDR Discussion
Topic: Listening to FM broadcast with HAM IT UP
Replies: 3
Views: 104

Re: Listening to FM broadcast with HAM IT UP

Any good converter would have a LPF in front of it. No VHF.
Alan
by alanzfq
Sat Oct 26, 2019 2:55 pm
Forum: RTL-SDR Discussion
Topic: RTL SDR driver problem on windows 10
Replies: 2
Views: 208

Re: RTL SDR driver problem on windows 10

I see no screenshot.
Have you used Zadig?
Use WinUSB or libusbK is an alternative driver.
Alan
by alanzfq
Wed Oct 16, 2019 9:14 am
Forum: RTL-SDR Discussion
Topic: More on Showing wave form on an oscilloscope.
Replies: 8
Views: 535

Re: More on Showing wave form on an oscilloscope.

"could be any signal I believe" Not fed into a soundcard.
If you do not use that method I think it is even more complicated.
Measurement is the problem.
Alan
by alanzfq
Wed Oct 16, 2019 6:41 am
Forum: RTL-SDR Discussion
Topic: More on Showing wave form on an oscilloscope.
Replies: 8
Views: 535

Re: More on Showing wave form on an oscilloscope.

Presumably that software will compare two audio signals from the two synchronised receivers?
Alan
by alanzfq
Tue Oct 15, 2019 8:16 am
Forum: RTL-SDR Discussion
Topic: More on Showing wave form on an oscilloscope.
Replies: 8
Views: 535

Re: More on Showing wave form on an oscilloscope.

The youtube shows a simple way of getting an equal distance. Measuring between antennas is not simple. I can not give you instructions but I think you will need two identical locked receivers and then compare the outputs. I do not know where to take the output to be able to preserve and observe or m...
by alanzfq
Mon Oct 14, 2019 6:44 am
Forum: RTL-SDR Discussion
Topic: RTL-SDR Stops working
Replies: 2
Views: 220

Re: RTL-SDR Stops working

Bad cable?
Bad joint on USB plug?
Alan
by alanzfq
Thu Oct 10, 2019 8:46 pm
Forum: RTL-SDR Discussion
Topic: SDR has clear strong signal, 2 Meter ham rig has bad signal using same antenna
Replies: 4
Views: 398

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
by alanzfq
Fri Oct 04, 2019 1:39 pm
Forum: RTL-SDR Discussion
Topic: odd dark spot on audio decode with hdsdr
Replies: 2
Views: 296

Re: odd dark spot on audio decode with hdsdr

It notches out constant tones.
Not good for data modes, it works too well.
Alan
by alanzfq
Sat Sep 21, 2019 11:19 am
Forum: RTL-SDR Discussion
Topic: Compare field strength
Replies: 3
Views: 444

Re: Compare field strength

What do you want to do?
Comparing signal levels to within about 1dB is easy.
Actual Field Strength will need a standard, few, if any, SDRs are calibrated.
Alan