Glossary Of Terms - Grundig 800 MILLENNIUM Use And Care Manual

1) AC Input - Alternating Current power source available
at wall outlet sockets.
2) AM - Signals in which the information is conveyed by
amplitude changes of the signal. Amplitude Modulation
is used for the AM broadcast bands.
3) AGC - Automatic Gain Control which is employed in
receivers to adjust the amount of gain in the receiver's
circuitry to prevent distortion and maintain a nearly
constant audio volume level over wide variations in
received signal strength.
4) Attenuation - Loss, as applied in the text of this
manual, added prior to the input stages of the receiver to
reduce the level of very strong signals that may occur on
certain bands, in certain locations, at certain times or a
combination of all three factors. Each 10 dB (decibel)
step reduces the power of the received signal by a factor
of ten.
5) CW - Continuous Wave transmission signals. Actually,
the signal is keyed on and off at precise intervals to
convey information. Morse code is the most common
CW signal.
6) DC Input - Direct Current power source such as is
available from batteries or regulated power supplies.
7) Dynamic Range - Ability of the receiver to faithfully
reproduce high quality audio over a wide range of signal
strength conditions - from very weak signals to very
strong signals.
8) Frequency - Rate of reoccurrence in hertz or cycles
per second of an electromagnetic wave or carrier.
9) FM - Signals in which the information is conveyed by
frequency changes of the signal. Frequency Modulation
is used for the FM broadcast bands.
10) Electronically Switched Filter - A multi-bandwidth
filter with high adjacent channel attenuation switched
electronically.
11) GMT - Greenwich Mean Time.

GLOSSARY OF TERMS

12) HF - High Frequency band extends from
approximately 1.5 MHz to 30 MHz.
13) LCD - Liquid-Crystal Display - Low power consump
tion displays used for wristwatches and information
displays on many types of electronic equipment.
14) LSB - Lower Side Band - The lower frequency
portion, excluding the carrier, of an AM signal. A
single-sideband signal, in this case the lower sideband,
contains all of the modulation information of amplitude
modulation in one half the bandwidth.
15) RF - Radio frequency.
16) RTTY - Radio Teletype communications.
17) Squelch - A user controlled adjustment which mutes
the audio output below a certain signal strength.
18) Synchronous Detector - An amplitude modulation
detector which utilizes a replica of the original transmit
ted carrier signal to improve the reception of weak
signals.
19) Synthesized - Capable of generating a large
number of different output frequencies, all related to a
single, highly stable reference source.
20) Up Conversion - A frequency conversion technique
that translates an incoming RF signal to a higher fre
quency.
21) USB - Upper Side Band - The higher frequency
portion, excluding the carrier of an AM signal. A single
sideband signal, in this case the upper sideband,
contains all of the modulation information of amplitude
modulation in one half the bandwidth.
22) UTC - Universal Time Coordinated.
23) VFO - Variable Frequency Oscillator.
24) VHF - Very High Frequency band extends from
approximately 30 MHz to 300 MHz.
29