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  2. Synchronous dynamic random-access memory - Wikipedia

    en.wikipedia.org/wiki/Synchronous_dynamic_random...

    The DDR interface accomplishes this by reading and writing data on both the rising and falling edges of the clock signal. In addition, some minor changes to the SDR interface timing were made in hindsight, and the supply voltage was reduced from 3.3 to 2.5 V. As a result, DDR SDRAM is not backwards compatible with SDR SDRAM.

  3. Software-defined radio - Wikipedia

    en.wikipedia.org/wiki/Software-defined_radio

    Software-defined radio (SDR) is a radio communication system where components that conventionally have been implemented in analog hardware (e.g. mixers, filters, amplifiers, modulators/demodulators, detectors, etc.) are instead implemented by means of software on a computer or embedded system. [1]

  4. List of software-defined radios - Wikipedia

    en.wikipedia.org/wiki/List_of_software-defined...

    FMC (to Xilinx board) then USB 2.0 or Gigabit Ethernet. Yes Yes Yes ADALM-PLUTO [15] Pre-built Active 325 MHz – 3.8 GHz (70 MHz – 6 GHz with software modification [16]) 20 MHz (streaming may be less due to USB 2.0) 12 12 Yes 61.44 MSPS 1/1 USB 2.0, Ethernet & WLAN with USB-OTG adapter Yes Yes Yes Xilinx Zynq Z-7010 AFEDRI SDR [17] Pre-built

  5. System Design Review - Wikipedia

    en.wikipedia.org/wiki/System_Design_Review

    The SDR is a technical review conducted to evaluate the manner in which a project's system requirements have been allocated to configuration items, manufacturing considerations, next phase planning, production plans, and the engineering process that produced the allocation. This review is conducted when the system definition is at a point where ...

  6. ETSI Satellite Digital Radio - Wikipedia

    en.wikipedia.org/wiki/ETSI_Satellite_Digital_Radio

    ETSI Satellite Digital Radio (SDR or ETSI SDR) describes a standard of satellite digital radio. It is an activity of the European standardisation organisation ETSI . It addresses systems where a satellite broadcast directly to mobile and handheld receivers in L band or S band and is complemented by terrestrial transmitters.

  7. DDR SDRAM - Wikipedia

    en.wikipedia.org/wiki/DDR_SDRAM

    This example compares different real-world server memory modules with a common size of 1 GB. One should definitely be careful buying 1 GB memory modules, because all these variations can be sold under one price position without stating whether they are ×4 or ×8, single- or dual-ranked.

  8. XDR (audio) - Wikipedia

    en.wikipedia.org/wiki/XDR_(audio)

    XDR (expanded dynamic range), also known as SDR (super dynamic range) is a quality-control and duplication process for the mass-production of pre-recorded audio cassettes. It is a process designed to provide higher quality audio on pre-recorded cassettes by checking the sound quality at all stages of the tape duplication process.

  9. Universal Software Radio Peripheral - Wikipedia

    en.wikipedia.org/wiki/Universal_Software_Radio...

    A rev 3 USRP1 platform, serial #140, with an attached TVRX daughterboard. Universal Software Radio Peripheral (USRP) is a range of software-defined radios designed and sold by Ettus Research and its parent company, National Instruments.