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  • Fastext

    A display system that automatically loads certain teletext pages into 
    the memory of a TV's teletext system ready for rapid access via colour 
    coded buttons on the TV's remote control corresponding to the colours 
    on the screen.

  • Fidelity

    Used in the home entertainment sector, this refers to the degree to which 
    an electronic product accurately reproduces sound. True high fidelity (hi-fi) 
    systems deliver sound as close as possible to the original signal.

  • Field

    Partial scan of a television / broadcast image. As an example, the 
    UK (PAL) TV standard has two fields, which interlace into a full frame. 
    The system transmits 50 fields or 25 frames per second.

  • Filter

    A device that allows certain parts of signals to pass through while stopping 

  • Flickering

    Instability or vertical roll of a TV or plasma screen picture.

  • FM

    Frequency Modulation - Used in broadcasting the audio portion of television 
    signals, this is a method of adding a signal to the carrier signal by changing 
    the carrier's frequency. This form of modulation is used for television sound 
    transmission in most of the world, plus for satellite transmission and for 
    video tape recording as it is less suscetible to interference than AM 
    [Amplitude Modulation].

    Today, the form of TV signals has now been replaced by broadcasting with 
    digital signals. FM frequencies are now allocated for use by mobile service 
    providors and others including the emergency services.  

  • Frame

    In vision terms this is a television image consisting of two fields. 
    In the UK the PAL broadcast system scans 25 frames per second.

  • Frequency

    Throughout the world, frequencies are allocated for varying functions 
    of communication. Commonly known as channels, these are 
    assigned so that, TV, radio or mobile phone signals may be transmitted 
    without interference as the pitch of the radio signal distinguishes it 
    from another.
    A frequency is the number of complete oscillations per second of an 
    electromagnetic wave and usually measured in Hertz [Hz]. 

  • Frequency Range

    Measured in Hertz (Hz), the frequency range of an audio component is 
    the range of frequencies it reproduces with a flat (linear) frequency response.

  • Frequency Response

    Specification indicating how evenly a range of frequencies is reproduced by 
    an audio component or sound system. Usually expressed as a specific 
    range (45Hz to 17,000Hz, for example) and combined with a plus/minus 
    decibel figure indicating how evenly the frequencies in that range are 

    The audible range is considered to be 20-20,000Hz.
    The term Hz [Hertz] is synonymous with cycles per second.

  • Fringe Area

    A location that is far enough from TV, radio or mobile phone transmitter to 
    give consumers / end users reception problems. 
    This is more apparent if the location has hills, towers or other signal obstructions.

  • FPC

    Flexible Printed Circuit.

  • FED

    Field Emission Display - An emissive flat panel display that uses small 
    electron emitters to excite a phospher screen to emit light. 
    Also known as Flat CRT.

  • Flat CRT

    An emissive flat panel display that uses small electron emitters to 
    excite a phospher screen to emit light. 
    Also known as FED [Field Emission Display].

  • FPD

    Flat Panel Display - Commonly used term used to refer to most 'flat' 
    display technologies, i.e., Plasma, LCD, OLED, SED and FED.


    A widely available UK terrestial DIGITAL service [via a suitable TV aerial 
    as opposed to cable or satellite dish], providing a wide range of digital 
    programmes [more than 100 TV channels and 20 radio stations] made 
    available through a separate DIGITAL tuner [STB] or TV set incorporated 

  • freesat

    FREESAT is a digital satellite TV service and product offering the best of 
    Digital TV including amazing HD [high definition] pictures and HD sound 
    without the need to pay any subscription charges for the privilege – you 
    pay only for the FREESAT Digital Box, satellite dish and installation.

    If you already have a dish then easier still – the unit is available without 
    the dish and installation package - simply connect the cable for your 
    existing satellite dish. Basically it is a style of Freeview with HD via a 
    satellite dish rather than an aerial.
    Launched Spring 2008 launch - Initially formed in May 2007 as a joint 
    venture between the BBC and ITV, FREESAT is funded 50/50 by the 
    shareholders of ITV plus the BBC as a not-for-profit organisation.
    Technical information released states, “Although the FREESAT 
    service uses Astra 2 at 28.2° East, a similar 45-60cm dish pointing 
    at the nearby Eurobird at 28.5° East, thought to also be able to
    receive FREESAT. 
    Note that these satellites are also already in use for existing UK 
    digital-satellite television platforms."




  • Freeview HD

    Introduced and launched end of March 2010 within the UK. Freeview HD 
    set-top-boxes [STB] are now available from a variety of manufacturers. 
    Click INFO for more details relating to services in your area as not all 
    areas will be able to retrieve this FREE service even after the completition 
    of switchover late 2012 early 2013.