SDR stands for Software Defined Radio i.e., "radios that provide software control of a variety of modulation techniques, wide-band or narrow-band operation, communications security functions (such as hopping), and waveform requirements of current & evolving standards over a broad frequency range."
Simply put SDR is defined as :
"Radio in which some or all of the physical layer functions are software defined"
SDR defines a collection of HW and SW technologies where some or all of the radio's operating functions (also referred to as physical layer processing) are implemented through modifiable SW or firmware operating on programmable processing technologies
Now, coming to Web SDR, SDR is made available through web. Here, radios are available at one place and connected to the web so that by browsing to those sites through the relevant URLs, you can tune the stations virtually and listen to those stations. It is really funny and inspiring
A webSDR is a Software Defined Radio (i.e. characteristics configurable in software) which is accessible via a web interface. Normally the device can be used by many users simultaneously.
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SandRidge Mississippian Trust II (SDR)had its IPO in 2012.
Special Drawing Rights - an IMF currency aligned to major currencies.
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As of July 2014, the market cap for SandRidge Mississippian Trust II (SDR) is $418,187,250.00.
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If the motherboard supports both DDR and SDR RAM, it is almost always a better idea to go with DDR RAM
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The Special Drawing Right (SDR) is an interest-bearing international reserve asset created by the IMF in 1969 to supplement other reserve assets of member countries. • The SDR is based on a basket of international currencies comprising the U.S. dollar, Japanese yen, euro and pound sterling. It is not a currency, nor a claim on the IMF, but is potentially a claim on freely usable currencies of IMF members. The value of the SDR is not directly determined by supply and demand in the market, but is set daily by the IMF on the basis of market exchange rates between the currencies included in the SDR basket. • It can be held and used by member countries, the IMF, and certain designated official entities called "prescribed holders"-but it can not be held, for example, by private entities or individuals. Its status as a reserve asset derives from the commitments of members to hold, accept, and honor obligations denominated in SDR. The SDR also serves as the unit of account of the IMF and some other international organizations.
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