Buttons On The Right; Select Modulation Mode: Am Or Fm - Albrecht AE 6891 Bedienungsanleitung

In AM this channel is also used by all truckers.
ASQ Auto squelch on/off (see section Automatic Squelch).
FRQ This function toggles between the common channel number display and
frequency display.
LOC Receiver sensitivity selector
Press the FC button, then press LOC ("local" = reduced sensitivity for close
range, LOC is displayed). Press FC + LOC again to deactivate the function,
LOC turns off and the device has again its full sensitivity.
On/Off switch, press and hold for approx. 2 seconds.
FC Function button for some secondary functions. Combined with VR knob.
Press the VR button once = secondary function, then press the desired
function button.
CH Rotary button for channel selection (same function as the UP and DOWN
buttons on the microphone.
Tone filter on/off: used to filter the tone during reception if noise or
TON
interferences are too aggressive with weak signals. The tone filter trims the
treble with the noise.
BP Press and hold VR button: Key beep tones on/off.
Traditional CB radio started in the US with 23 channels and the classic modulation mode AM,
like amateur radio, sea radio a commercial radio stations in the 1950s and 1960s. Today AM
can be found in medium wave and short wave radio stations and in aircraft radio. For
commercial radio today only FM is used and for short wave long-distance traffic SSB (single
sideband AM). In Europe authorities early restricted CB radio to replace the traditional AM
modulation with the interference-free FM modulation. Despite all this especially truckers
clung to the old CB traditions and until today use amplitude modulation; this actually has
some advantages compared to FM with the less interfering truck diesel engines: a less
aggressive sound for the human ear and less noise on unused channels during reception.
Long lasting demands of CB radio operators were finally acknowledged:
More and more EU countries permitted AM again, mainly even registration and license-free,
since the suspected noise caused by AM disappeared; the previous "problem children" such
as stereo equipment, VCRs or broadband antennas interference resistance has significantly
improved during the past years with digitization in TV and satellite technology. The new
European standard again permits AM with full transmission power (4 Watts).
Press the A/F button to toggle between AM and FM (the mode is displayed). For Austrian FM
devices this button is invalid.

Buttons on the Right

Select Modulation mode: AM or FM?

13