Electronic Definitions (F)
[F] Presenting a list of electronic terms starting with letter f 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 [F] | Descrtiption | Other Electronic Terms Somewhat Related; |
F Connector |
- Industry standard connector used for attatching coaxial cables from the LNB to the satellite receiver | |
F/D Ratio |
- Ratio of length of dish depth at its centre point and the diameter. Shallow dishes have higher F/D ratios | |
Failure |
- A necessary step to success |
cctv repair, error, journal file, mi6 |
Fax |
- Facsimilie |
fax/tel switch |
Fax/Tel Switch |
Faoice Operation | |
FCC |
"Federal Communications Commmion" | |
FCS |
"Frame Check Sequence" |
ioca |
FDD |
"Frequency Division Duplex" |
fddi |
FDDI |
"Fibre Distributed Data Interface" | |
FDMA |
"Frequency Division Multiple Access" | |
FE |
"Functional Earth" |
fec, fed, feedhorn antenna, feedthrough hole, fei, fet, fetch phase, fetch/execute cycle |
FEC |
"Forward Error Control" "Forward Error Correction" |
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FED |
"Field Emission Display" |
offset fed antenna |
Feedhorn Antenna |
- The small widebeam antenna that illuminates (gathers signal from) the reflector in an antenna systern | |
Feedthrough Hole |
- A plated hole to connect two or more circuit layers of a substrate |
grid pattern |
FEI |
"Federation of the Electronics Industry" | |
FET |
"Field Effect Transistor" |
fetch phase, fetch/execute cycle |
Fetch Phase |
- Is the part of the cycle in which the instruction is copied into the arithmetic logic unit and decoded | |
Fetch/Execute Cycle |
- Is the complete process of retrieving an instruction from store decoding it and carrying it out. Also called instruction cycle | |
FFT |
"Fast Fourier Transform" | |
Fiber Optic |
- A type of technology that uses glass (or plastic) threads (fibers) to transmit data from one network to another. | |
Fiducial Targets |
- A shape or pattern retained in two or more locations on the substrate surface for assembly systems using vision alignment | |
Field |
- Is a predetermined section of a record (e.g. date of birth in a pupil record) |
field effect transistor |
Field Effect Transistor |
- A transistor that depends on the action of an electric field to control its conductivity | |
FIFO |
"First In First Out" - Is a term used to describe the behaviour of a queue |
|
Fifth Generation |
- Is a term used to categorise the type of computer architecture that is predicted for the early 1990s | |
File |
- Is an organised collection of related records |
filename extension, filestore |
Filename Extension |
- Is an addition to a filename which may determine the file`s type (e.g. FRED.FOR a Fortran program; FRED.OBJ the compiled form of FRED.FOR) | |
Filestore |
- Consists of those files available online to the operating system at any given time | |
Fillet Junctions |
- Electrical and mechanical solder connection to the contacts of a device | |
Fine Pitch |
- Integrated circuit devices with center to center lead spacing of 0,032 inch or less | |
FIR |
"Finite Impulse Response" |
first generation |
First Generation |
- Is the generic term used to describe those early machines which used electronic valves and had limited size storage devices such as mercury delay lines electrostatic and magnetic drum memories | |
Fixed Head Disk Unit |
- Is one where a separate read/write head is positioned over each track on each surface; this reduces access time at increased cost | |
Fixed Length Record |
- Is one where the number of bits (or characters) is predetermined | |
Fixtures |
- Holding plates, clamps, solder paste stencils, and other hardware used to process a circuit assembly | |
Flag |
- A voltage that indicates an event has taken place | |
Flange |
- An effect created by layering two identical sounds with a slight delay (1- 20 mS) and slightly modulating the delay of one or both of the sounds | |
Flash Hook |
- A button or action to disconnect the local loop connection temporarily. Sometimes used to signal to the exchange to put the caller on hold. | |
Flat Cable |
- Insulated multiple paths of wire or conductive material routed in parallel | |
Flat Plate Antenna |
- Brought to public eye by the now defunct BSB who named it the Squarial. Operates by adding together the signal from an array of dipoles. | |
Flexible Circuits |
- Conductive circuit etched on one or more surfaces of a flexible substrate base | |
Flip Flop |
- Is a device or circuit that can be in citlier of two states | |
FLIR |
"Forward Looking InfraRed" | |
Floating Load |
- This is load that has non zero node voltages on each | |
Floating Point Notation |
- Is a form of notation in which numbers are expressed as a fractional value (mantissa) followed by an integer expoiient of the base. | |
Floppy Disk |
- Is a lightweight flexible magnetic disk that behaves as if rigid when rotated rapidly. It is robust and light enough to send through the post. Also called a diskette. |
floppy disk drive |
Floppy Disk Drive |
- Practically all PCs come with a floppy disk drive. 3.5in HD (high density) 1.44Mb floppy disks are now the standard. | |
Flowchart |
- Is a graphical representation of the operations involved in a data processing system | |
Flux |
- Active chemical used to promote intermetahc bonding of solder to the substrate circuit and device lead or contact |
conformal coatings, pfd |
FM |
"Frequency Modulation" - The baseband signal is caused to vary the frequency of the carrier wave |
fm improvement |
Fm Improvement |
- Increase in S/N at the output of an FM demodulator relative to its input (at expense of bandwidth). | |
Fold Line |
- The bend point of a flexible circuit substrate | |
Foldback Current Limiting |
- Simple current limiting allows the load current to reach a maximum value while the load voltage is reduced to zero | |
Follow Me |
- PABX feature allows calls to be autofmtically rerouted from one exte~ to another immediately or if the call is not answered within a set number of rings | |
Font |
- Is the set of printing or display characters in a particular type style. Printers may offer a choice of fonts either by exchanging the printhead (daisywheel) or by software control as with a dotmatrix or inkjet printer. |
fonts |
Fonts |
- Apply to both screen and printed letters |
computer security, floppy disk drive, font |
Footpath |
- Coverage area of a satellite beam: a contour map showing EIRP PFD antenna size or G/T contours within a satellite`s coverage zone. | |
Foreground/Background Processing |
- Is a method of organising a timesharing computer system so that certain critical tasks may claim the sole use of the computer when required while other less pressing tasks utilise the remaining time | |
Format |
- To wipe a floppy or hard disk in order to prepare it to accept data |
cctv lenses |
Forth |
- Is a language using a reverse polish notation with applications in control |
cordless |
FORTRAN |
"FORmula TRANslation" - Is used for scientific programming |
filename extension, integer, real number |
Forward Bias |
- Applying an external voltage to overcome the barrier potential | |
Fourth Generation |
- Is a term used to describe those machines that are currently (mid 1980s) in common use. | |
FPAA |
"Field Programmable Analogue Array" | |
FPLMTS |
"Future Public Land Mobile Telecommunication System" |
imt2000 |
FRAD |
"Frame Ready Assembler/Disassembler" | |
Frame |
- Is one complete television picture consisting of 625 separate lines; a new frame is transmitted every 1/25th second as two interlaced fields: the odd numbered lines followed by the even numbered lines. |
frame relay |
Frame Relay |
- An interface specification based on LAPD (Q.921), the Integrated Services Digital Network version of LAPB (X.25 data link layer) | |
Fraud |
- A person or thing intended to deceive others, typically by unjustifiably claiming or being credited with accomplishments or qualities | |
Free Electron |
- One that is loosely held by an atom. Also known as a conduction-hand electron because it travels in a large orbit, equivalent to a high energy level |
carrier, donor, lifetime, recombination |
French Intelligence |
- French intelligence is intercepting British businessmen`s calls after investing millions in satellite technology for its listening stations. | |
Frequency Response |
- The graph of voltage gain versus frequency for an amplifier | |
FRET |
"Fast Recovery mosfET" | |
Friode |
- Term used to describe a fried, blown, or otherwise damaged diode | |
Front End Processor |
- Is a small computer that receives data from a number of input devices organise it and transmits it to a more powerful computer for processing | |
FRU |
"Force Research Unit" | |
FSB |
"Front Side Bus" | |
FSIC |
"Function Specific Integrated circuit" | |
FSK |
"Frequency Shift Keying" - A means of data transmisson commonly used in modems where the two states of the signal are transmitted as tones of two different frequencies |
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FSS |
"Fixed Satellite Service" |
triple band lnb |
FTAM |
"File Transter And Management" | |
Full Adder |
- Is a logic circuit that adds a pair of corresponding bits of two numbers expressed in binary form and any carry from a previotis stage producing a sum and a new carry. Also called a three input adder. |
adder |
Full Duplex |
- A circuit which carries information in both directions simultaneously | |
Full Wave Rectifier |
- A rectifier with a center-tapped secondary winding and two diodes that act as back-to-back half-wave rectifiers | |
Functional Testing |
- Simulation testing of a finished circuit assembly |