| AM |
Used to describe the Medium, Long and
Short wave bands |
| Bandwidth control |
Bandwidth control on a short-wave radio
receiver allows you to control the selectivity of the receiver so that interference can be
reduced considerably. |
| EON-traffic
system |
By utilising the RDS service
"Enhanced Other Network" (EON) Listen to an RDS programme without missing
news even from other networks. |
| FM |
Used to describe the VHF wave band |
| Ionosphere |
shortwave travel around the earth by
bouncing between the earth and the ionosphere (The part of the earth's atmosphere that
reflects shortwave back to the earth) |
| LCD |
(Liquid Crystal Display) all of our
digital radio's have LCD displays |
| Local
DX Switch |
DX stands for distance. This
switch adjusts the sensitivity of the radio to improve reception
of distant stations or prevent over loading of the radio by a very
strong local transmitter. |
| Notch
Filter |
A notch filter removes a very narrow
slice from a received signal. either from the radio frequency itself (RF notch) or from
the audio output (audio notch) of the receiver |
| Narrow,
Wide |
With so many stations broadcast on
adjacent frequencies, its is possible to adjust the signal bandwidth and sharpen the
tuning to reduce unwanted noise |
| Pre-sets |
This allows you to programme your
favourite stations on you radio |
| PLL |
(Phase Lock Loop) an Electronic circuit
in digital radios that locks onto your chosen station to give clear drift free
reception. |
| RDS |
(Radio Data System) The LCD display on
the radio will display the radio station name and depending on the
model of radio, some program information as well |
| RF Gain |
A Control that permits the sensitivity
of the reciver to be continuously varied |
| SSB |
(Single Sideband) Only essential if you
want to listen to ham radio and utility stations. Single side band operation
makes it possible to concentrate the full transmission energywith suppressed carrier noise |
| Scanning |
This feature allows the receiver to
automatically tune through a desired frequency range, stopping on all
frequencies where a signal is present. |
| Selectivity |
The ability of the receiver to select
the station it is tuned to, from all the others close to it on the dial/display. |
| Sensitivity |
The ability of a shortwave radio to
repond to weak signals. It is measured in microvolts. The lower the measurement in
microvolts, the fainter the signal the radio can receive. |
| Squelch |
This quiets the
receiver audio until the strength of the signal exceeds a
desired level. |
| Synchronous
detection |
This feature is found on the Sony SW7600
SW100E and Grundig Satellite 800. It is a circuit that replaces
the carrier in a received AM signal with with an internally generated replacement to
reduce the effects of fading. |
| Varible Bandwidth Tuning |
This is a circuit that allows the
selectivity of a receiver to be continuously varied. |
| World Band |
Another name for short wave |
Airband Radios
