We are pleased to announce release 1.8.0 of the API for the SDRplay RSP. This is a major upgrade to the API with new features and an improved gain map which should result in improved performance over a key portion of the gain control range. Currently this API is available for Windows only, but versions for Linux and Mac OS and Android will follow shortly.
The API now incorporates automatic post tuner DC offset correction and I/Q compensation. This will almost completely eliminate the DC centre spike that was previously present in zero IF mode and also correct for amplitude and phase errors in the I/Q signal paths that can lead to in-band images when strong signals are present. There is a new gain map for the RSP which should help improve the receiver noise floor for gain reduction settings in the range of 59-78 dB. To achieve this, the IF gain control range has been increased from 59 to 78 dB. In addition, the user can now turn the LNA on or off at any point within the IF gain control range.
This means that the LNA can remain on for gain reduction settings of up to 78 dB, whereas previously the maximum gain reduction that could be attained whilst the LNA was on was only 59 dB. Being able to leave the LNA on will result in improvements in the receiver noise performance for gain reductions in the range of 59 to 78 dB. The upper 19 dB of the IF gain control range have now been disabled.
In practice this part of the gain control range was useless as trying to operate within this region always lead to receiver overload even when signals were very weak. To fully exploit the features of this new API release, we have also issued release 3.5 of the ExtIO plugin.
Jun 27, 2018 Software defined radio for Linux and Mac. Gqrx is a software defined radio receiver powered by GNU Radio and the Qt GUI toolkit. It can process I/Q data from many types of input devices, including Funcube Dongle Pro/Pro+, rtl-sdr, HackRF, and Universal Software Radio Peripheral (USRP) devices. Get started with Software Defined Radio SDR for $20learnelectronics. You can buy a $15 TV receiver that will allow you to turn your Mac into a very capable radio scanner capable of listening to police, aircraft, amateur radio, CB.
This plugin will work with HDSDR, SDR sharp (releases 1361 or earlier) and Studio 1. Automatic I/Q compensation and DC offset correction will work with later versions of SDR sharp, but we will need to update the native plugin for users of these later versions to be access the new gain map. Similarly, users of SDR Console will gain the benefit of automatic DC offset compensation and I/Q correction, but will not yet be able to access the new gain map. We hope that a version of SDR console that unlocks this feature will become available in the near future. Until a new release of SDR-Console is available, you can copy the API into the SDR-Console installation directory from C: Program Files MiricsSDR API x64 mirsdrapi.dll to C: Program Files SDR-RADIO-PRO.com mirsdrapi.dll The API installer has also contains an extra certificate to be more user friendly for Windows XP, Vista and Windows 7 users.
![Software Software](/uploads/1/2/5/5/125510986/546343291.png)
The new API and ExtIO plugin can be downloaded from our website at.
Read this article in Introduction Imagine that you are inside a large Gothic cathedral, and the sunlight is streaming in from the windows on to a beautiful painting. You pull out your digital camera and take a photograph of the beautiful artwork on the church wall near one of the windows. You need not have bothered. Your digital photograph will be a flop. Either the painting will be dark and barely visible, or the window will appear as a glaring and dominant white area that is hardly recognizable as a window. The problem is not your camera. The problem is that the dynamic range of the scene exceeds what the camera is able to capture.
Since the birth of photography, photographers have attempted to increase the dynamic range that a photograph captures to recreate how our eyes see. A camera is able to capture a dynamic range of about 1:1,024 where the human eye is capable of seeing somewhere around 1:65,500. In the days of film, bridging this gap occurred in the darkroom. Today it occurs in the computer using a very nice program called HDR or High Dynamic Range. There is an abundance of information on the web regarding HDR photography, so I will only cover the basics here. The photographer will take several different exposures of the same scene encompassing the gamut of range in the exposures.
You would have an exposure for the brightest area of the photograph and several exposures—at least 1 F-stop apart—bridging the gap until you have an exposure for the darkest area of the photograph. The HDR program then takes this range and reduces it down to a usable, reproducible range. You can understand that compressing that much information doesn't always yield the best results the first rattle out of the box. HDR is often mistaken for micro-contrast. Micro-contrast is different process where the details of the image are enhanced by increasing the contrast in small lines next to each other. Many HDR programs include micro-contrast just to make things look different and cool. You can create and HDR image without introducing micro-contrast and you can introduce micro-contrast without using HDR.
For this purpose, we are talking about HDR only and my goal was to reduce a wide gamut to a usable one. Some quick tips for your HDR photographs Use a tripod. The images must align properly before they can be blended and if you hand-hold your camera, the software may be unable to align them correctly creating some odd ghosting in your image. I would recommend using a cable or remote release as well.
Use manual exposure or a 'bracketing mode' on your camera to get your exposures. Separate your exposures by at least one f-stop. I personally separate my images by 1.5 f-stops. If you need more information, there is a lot of it out there. show-hide toggle See Also: Rated Products The difficulty I encountered while reviewing these programs was not knowing what the skill level of the reader would be.
Novices at photography and those that do not want to spend a lot of time on their computers will prefer a different program than someone who is highly skilled at computer usage and picky about their photography. In my review, I have attempted to illuminate the assets and liabilities of each program to help you decide what is best for you at your level.