Search found 16 matches

by JMG
Wed Aug 09, 2017 8:25 am
Forum: SDRplay related
Replies: 6
Views: 479


You may take a look at the navy-signals at 20kHz. The narrowband signals (B=200Hz) have a world wide coverage. This will give you an idea on how good your antenna system is. And you can compare your signal to an excellent receiving system at the Netherlands: At my ...
by JMG
Thu Jun 01, 2017 8:14 am
Forum: SDRuno
Topic: Antenna Referred Power Measurement.
Replies: 9
Views: 2872

Re: Antenna Referred Power Measurement.

"dBm" makes a lot of sense! DBm is a logarithmic parameter for rf-power, not depending on the impedance. In the near future it will replace all the last century parameters like dBuV, S-units, receiver sensitivity uV, power.... All modern test equipment like signal-generators, power sources...
by JMG
Wed Mar 22, 2017 10:49 pm
Forum: SDRplay related
Topic: SDRplay and SDR sharp
Replies: 11
Views: 3551

Re: SDRplay and SDR sharp

someYguy wrote:I just tried SDR# v1.0.0.1500(the latest) with the v2.2 plugin under Windows 7 and it works fine here.....

The latest version is 1530 now. Seems it does not work any more now.
by JMG
Mon Mar 20, 2017 11:29 am
Forum: SDRplay related
Topic: Sensitivity specification for RSP2?
Replies: 2
Views: 1186

Re: Sensitivity specification for RSP2?

The RSP/SDRuno combo easily allows to determine the sensitivity of the receiver. Sensitivity of a receiever best is specified by its noise figure NF. The noise figure is the factor between the fundamental thermal noise power of a resistor and the total noise power of the receiver. The resistor noise...
by JMG
Sat Mar 18, 2017 11:12 am
Forum: General
Topic: RSP RFI
Replies: 3
Views: 2739


A common mode rejection filter has been added to the USB data lines. This will give some additional improvement in noise suppression. Addding the filter to a RSP2 is not easy at all. The traces on the board are VERY small. In conjunction with a very short connection between the ground ports of the U...
by JMG
Tue Jan 17, 2017 7:59 pm
Forum: SDRplay related
Topic: Sdrsharp pluggin
Replies: 4
Views: 2004

Re: Sdrsharp pluggin

Works fine with SDRsharper(v0.5k) too.
by JMG
Sun Jan 15, 2017 2:23 pm
Forum: SDRplay related
Topic: Block diagram for the RSP2?
Replies: 3
Views: 3360

Re: Block diagram for the RSP2?

The layout on the board is well structured. It is quite easy to follow the signal paths and identify the functional blocks. The HI-Z input has its own signal path: input port -> low pass filter (symmetrical) -> MSI001 input. Port A/B: Input port A/B -> switch, port A/B -> LNA, fixed gain -> attenuat...
by JMG
Tue Oct 18, 2016 9:58 am
Forum: Code Corner
Topic: SDRplay support for GNURadio on Windows
Replies: 2
Views: 3711

SDRplay support for GNURadio on Windows

I am using the official GNURadio on Windows with the osmosdr plugin, which works with other receivers and supposedly also supports SDRplay. I already installed the Windows API/hardware driver from, but osmosdr still doesn't recognize the receiver. How can I get SDRplay support for GNURad...
by JMG
Tue Sep 20, 2016 8:31 pm
Forum: General
Topic: Airband
Replies: 7
Views: 2788

Re: Airband

SDRplay shows excellent sensitivity at the airband!

by JMG
Wed Sep 07, 2016 10:47 am
Forum: SDR Antennas
Topic: Antenna mystery : UHF/VHF antenna better than longwire ?!
Replies: 4
Views: 3361

Re: Antenna mystery : UHF/VHF antenna better than longwire ?!

No myth.... At HF a well matched antenna will receive a noise level which is up to 50dB (!) above the noise level of the receiver. This may load the SDR receiver (having a limited daynamic range) to its limits. Less is more! The antenna will be good enough if the noise floor of the receiver will ris...

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