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Posted: Sat Feb 14, 2015 5:45 pm
by jon
People have been asking about the SDRplay RSP - there's currently a chance to try one out remotely using SDR-Console. Follow the instructions on there's also a video on how to do it on - this SDR receiver is based in the UK and hooked up to a full size G5RV so optimal for 3.5, 7, 14, 21 and 28MHz amateur bands. However you can pick up quite a bit on VHF since it is only 100km from central London in one direction and Birmingham in another and under the flight path for some transatlantic flights from London. It does occasionally lock-up (a function of the server not the RSP!) so if things seem dead just disconnect and connect again. I'm also hoping to encourage comments from RSP users now that there are a growing number of RSP owners around.

One important point about the RSP vs similar products out there - is that the tuner within the RSP has a highly programmable, high dynamic range analogue filter in front of the ADCs. This is a continuous time, calibrated, 5th order Cheyschev, active R-C filter that can be programmed to constrain the tuner bandwidth to being as low as 200 KHz (double sided) or as high as 8 MHz (4 MHz single sided). If aliased noise or spurs is a concern, then it is possible to set the filter bandwidth and the ADC sample rate to ensure that the energy from the tuner at the Nyquist frequency is well below the quantisation noise of the ADCs. This is a very different situation from where the receiver bandwidth is constrained by digital filtering after the ADCs, which can sometimes result in aliasing problems. Like the Airspy, the RSP also uses 12 bit ADCs, and this, along with the need to ensure that the gain line up in the tuner is set optimally, is key to ensuring that the dynamic range is maximised.

Anyway I hope this forum might be a good place to exchange experiences with the SDRplay RSP and other higher-end SDR radios


Re: SDRplay

Posted: Mon Mar 30, 2015 1:48 pm
by JMG
A new plugin for SDR# is available now. It works great with SDR# and SDRSharper (my favorite).

Re: SDRplay

Posted: Fri Aug 14, 2015 2:46 pm
by jon
Good news from SDRplay today:

We have now released our updated API - the new API fixes the frequency gap we have had up until now (previous gap was 380MHz to 420MHz worst case) -. It has been completely removed. .

Accompanying this is the new release of our EXTIO file with the following features:

Addition of an Advanced dialog box for additional Settings

Implementation of a selectable 1st LO frequency for the block converter. This will apply to frequencies below 60MHz (up-converted) and between 250MHz and 420MHz (down-converted). This allows full coverage between 100kHz and 2GHz in AUTO mode or the re-position of interferes at the expense of coverage range

Added a down conversion routine to convert Low IF modes to Zero IF modes for compatibility in SDR interfaces. IF bandwidths below 1.536MHz supported choice of IF Frequency and sample rate are restricted.

Added Options to control the DC offset compensation mode used by the tuner. Available modes are Static, Periodic, One-Shot and Continuous

Improved robustness when dynamically changing between IF modes and sample rates

SDR# and HDSDR users can benefit immediately from these features. It will take a while to get SDR-Console modified to remove the gap - SDRplay and Simon Brown will work on this in the coming weeks.

The new files and updated documentation are available from the platforms section of the website

Re: SDRplay

Posted: Sat Sep 12, 2015 8:35 am
by jon
and more good news for USA radio enthusiasts - Ham Radio Outlet are now stocking the SDRplay RSP in all their stores - see

Re: SDRplay

Posted: Mon Nov 23, 2015 1:23 am
by dlritter
Ah yes, read the last post, and promptly logged to HRO and purchased an SDRPlay..
It will go along side the Ham-it-Up/Airspy.
I use the RTL-SDR for all the neat RTL utilities..
RTL-Scanner in Python
NWT500 with WinNWT4.

Wow, after 7 Decades I finally find some neat toys.