Electronic Definitions (R)

[R] Presenting a list of electronic terms starting with letter r that are available for more detailed lookup for their definitions or abbreviation explanation. All terms are listed in alphabetical order for easy browsing.

Electronic Acronyms And Terms For [R]	Description	Other Electronic Terms Somewhat Related;
RACE	"Research in Advanced Communications for Europe"
RADAR	"Radio Detection And Ranging"
RAG	"Row Address Generator"
RAID	"Redundant Arrays of Independent Disks" "Redundant Arrays of Independent Drives" "Redundant Arrays of Inexpensive Drive"
Rain Outrage	- Loss of signal due to absorption and thermal noise accompanying heavy rainfall
RALU	"Register Arithmetic Logic Unit"
RAND	"Random"	random numbers
Random Numbers	- Are those generated without any detectable bias or pattern
RAP	"Rapid Application Prototyping"
RARP	"Reverse Address Resolution Protocol"
RAS	"Random Access Storage" "Reliability Availability and Serviceability" "Row Address Select"	rasapi
RASAPI	"Remote Access Service Application Programming Interface"
Ratio	- The ratio of the total gain and the total noise. Usually referred to in dB terms about the signal`s noise and gain in the do link via the dish polariser and I.NB.	ac current gain, ac resistance, aspect ratio, carrier to noise ratio, cctv lenses, modulation index, power gain snr, sparklies, third generation, transconductance, transfer function, ultrasound
Rat`s Nest Technique	- Preliminary interconnect planning for electrical circuits
Raw Data	- Is data as input to the computer before any validation or processing
RB	"Right Button" (Of 2 or 3 button mouse)	rbbs
RBBS	"Remote Bulletin Board System"
RCL	"Rotate Carry Left"
RCP	"RightHand Circular Polarisation"
RDA	"Remote Database Access"
RDB	"Receive Data Buffer" "Relational DataBase"	rdbms
RDBMS	"Relational Database Management System"
RDCLK	"Received Timing Clock"
RDS	"Radio Data Service"	rdsr, rdss
RDSR	"Receiver Data Service Request"
RDSS	"Radio Determination Satellite Service"
Re Entrant Program	- Is one where a single copy of the program may be shared at the same time between several users
Real Number	- Is any number represented with a fractional part. In FORTRAN and some other high level languages `real` is used to indicate floating point storage.
Realtime Clock	- Is an electronic unit that maintains the time of day in a special register that may be accessed by the programmer
Realtime System	- Is a system that is able to receive continuously changing data from outside sources and to process that data sufficiently rapidly to be capable of influencing the sources of data
Recombination	- The merging of a free electron and a hole	lifetime
Record	- Is a collection of related items of data treated as a unit for processing	record format, recording adaptor, recording telecomms
Record Format	- Is the description of the contents and organisation of a record usually part of a program specification
Recording Adaptor	- For the recording of two way speech on the telephone line
Recovery	- Is the process of returning to normal operation after an error. The procedures may differ depending on the type of error or the type of program in use at the time and may include ensuring that the data has not been corrupted.	fret, journal file, reverse engineered code, schottky diode, surveillance
Rectifier Diode	- A diode optimized for its ability to convert ac to dc
Recursive Subprogram	- Is one that include among the statements making up the subprogram a further call to the same program
Redoc	- A reaction where oxidation and reduction take place
Reduction To Absurdity	- A trick used when a device may be operating as a current source or as a resistor
Reference Voltage	- Is an electronic device that ideally produces a fixed (constant) voltage irrespective of the loading on the device, power supply variations, temperature changes, and the passage of time
Reflow	- The process of heating solder paste to a liquid form to accomplish electrical and mechanical interface of components to the substrate	infrared, lead free solder, profiling, self centering, solder mask barrier, tombstoning
REG	"REGister"	register
Register	- Is a location which is sometimes protected used for specific purposes only	accumulator, indexed addressing, masking, mbr, program counter, realtime clock
Relational Operator	- Is a symbol used to express a relationship to be tested
Relaxation Oscillator	- A circuit that creates or generates an ac output signal without an ac input signal. This type of oscillator depends on the charging and discharging of a capacitor through a resistor.
Relay	- A Solid State relay is a switching device that completes or interrupts a circuit electrically and has no moving parts - A Mechanical relay is an electromechanical device that closes contacts to complete a circuit or opens other contacts to interrupt a circuit	frame relay, surveillance
RELSECT	"RELative SECTor"
REM	"REMark" "REMote" "Ring Error Monitor"	remote access, Remote Sensing, removal system
Remote Access	- TAM feature whereby messages left can be replayed over the telephone line to the user who may signal to the TAM using special codes	toll saver
Remote Sensing	- The use of satellite-borne instruments to determine the location and amount of resources on surface of the earth
Removal System	- Tools or equipment designed for the removal of surface mounted devices
REN	"REName" "Ringer Equivalence Number"
REP	"REPeat"	repe, repne, repnz, report generator, repz
REPE	"Repeat while Equal"
REPNE	"Repeat while Not Equal"
REPNZ	"Repeat while Not Zero"
Report Generator	- Is a program that gives the norispecialist user the capability of producing reports from one or more files through easily constructed statements
REPZ	"Repeat while Zero"
REQ	"REQuest"
RES	"Remote Execution Service" "REset" "RESolution"	reserved word, reset, resistor, Resonance, resonant frequency
Reserved Word	- Is an identifier used by the system and therefore not available to the programmer or user
Reset	- Is to return a computer system to its initial state (e.g. by restoring all registers to known values).
Resistor	- A device for limiting or restricting electrical current flow in a circuit, similarly in an electrical circuit, the opposition to electron movement or current flow is called resistance	current mirror, power dissipation, pullup resistor, reductio ad absurdum, RFI-FILTER, short circuit output current, swamped amplifier, Volt (Voltage)
Resonance	- A frequency at which a material object will vibrate. In a filter with resonance, a signal will be accentuated at the cutoff frequency.
Resonant Frequency	- The frequency of a lead-lag circuit or the frequency of an LC tank circuit where the voltage gain and phase shift are suitable for oscillations	phase shift
RET	"Resolution Enhancement Technology" "RETurn"	retention mounting tabs or bosses, return
Retention Mounting Tabs or Bosses	- Mechanical features for mounting or strengthening large components or connectors
Return	- Is to transfer control or exit from a subprogram back to the calling program. A subprogram may have more than one return instruction	bi directional printer, cctv repair, dc return, ground, nagging redailling, nrzi, reset, spring action
Reverse Bias	- Applying an external voltage across a diode to aid the barrier potential
Reverse Polish Notation	- Is a form of postfix notation	forth
Reverse Saturation Current	- The same as the minority carrier current in a diode. This current exists in the reverse direction.
Rework	- Correcting defects that do not meet the established quality requirement specified for the product	component/equipment storage, lead free solder, surveillance, touch up tools
RFL	"Radio Frequency Interference"	RFI-FILTER
RFI-Filter	- Is a type of electric or electronic emission that can degrade, impair or prevent electrical circuit performance
RGB	"Red Green Blue" - Describes a method of connecting a computer to a (colour) display in which the colour information is transmitted as three separate signals. RGB signals do not need to be decoded as does a PAL signal.
RHCP	"RightHand Circular Polarisation"	rhcp/rcp
RHCP/RCP	"RightHand Circular Polarisation"
RID	"Records Integration Division"
Right Angle Mounting	- Component or device designed to mount at a ninety degree rotation from the substrate surface
Right Brain	- The right half of the human brain. It contains a visual and nonverbal processing unit unlike any computer currently in existence.	intuition, metaphor
Rigid Circuits	- Non-flexible substrate with one or more conductive circuit layers for interconnecting electronic devices
RIMM	"Rambus In-line Memory Module"
Ripple	- With a capacitor input filter, this is the fluctuation in load voltage caused by the charging and discharging of the capacitor	ripple rejection
Ripple Rejection	- Used with voltage regulators. It revs you how well the voltage regulator rejects or attenuates the input ripple.
RISC	"Reduced Instruction Set Computer"
RKE	"Remote Keyless Entry"
RLC	"Run Length Code"
RMS	"Root Mean Square"	rms value
RMS Value	- Used with time varying signals. Also known as the effective value and the heating value.
Robo	"Remote Office Branch Office"	robotic equipment
Robotic Equipment	- Automated machines for the assembly of electronic products
Robustness	- Is the ability of a system to cope with errors and mishaps during program execution
ROMP	"Regionally Organised Modem Pools"
Rotary Dialing	- The pulse method of dialing in which a rotary dial causes a series of ons and offs to be sent. These are "counted" and the connection is made.
Rounding	- Is the process of approximating a number by its nearest equivalent to a set number of significant figures	rounding error
Rounding Error	- Is the error introduced by rounding
Routing Template	- Profile guide for the finished shape of a rigid substrate
RS232C	- Serial computer interface commonly used to connect to printers
RSA	"Rivest Shamir and Adlerman"
RTC	"Real Time Clock"
RTD	"Resistance Temperature Detector"
RTL	"Relay Transformer Logic"
RTS	"Request To Send"
RTTE	"Radio and Telecommunications Terminal Equipment"
RTTY	"Radio Teletypewriter"
RTZ	"Return To Zero"
Run	- Is the act of executing a program	run time, runtime system
Run Time	- Is either the length of time between the beginning and completion of the execution of a program or the time during which the program is being executed
Runtime System	- Is the complete set of software that must be in main store while a user`s program is being executed
RX	"Receiver"	fdd
Rī Parameters	- One way to characterize a transistor