ACR 4250 GB
18
Radio operation with RDS (Radio Data System)
Switching off security coding
• Turn off the radio.
• Press preset buttons 1 and 4 simulta-
neously and hold down while
• switching the set on again.
The display shows “CODE”.
• Now enter the code number to be found
in the car radio passport and confirm
(see example under “Switching on se-
curity coding”).
Security coding is now switched off.
CODE LED
To indicate that your unit is equipped with
security coding, the LED flashes for extra
security when the car is stationary.
stored frequencies, the unit is automatically
searching for an alternative frequency.
“SEARCH” will disappear from the display
when the alternative frequency has been
found or after the frequency band has been
run through completely.
If the reception quality of the selected pro-
gramme becomes too poor:
• Tune into another station.
REG - regional programme
Certain radio programmes are split up at
times into regional programmes offering lo-
cal information. The 1st programme broad-
cast by NDR, for example, offers program-
mes with different contents in the northern
states of Germany Schleswig-Holstein,
Hamburg and Lower Saxony at certain times
of the day.
If you are tuned into a regional programme
and wish to continue listening to this pro-
gramme,
• press the AF button for approximately
2 seconds.
“REG ON” appears in the display.
If you leave the service area of the regional
programme tuned into, or if you would like to
take advantage of the full RDS service,
switch to “REG OFF”.
The Radio Data System offers you more
convenience when listening to FM radio sta-
tions.
More and more radio stations have begun to
broadcast RDS information alongside their
programmes.
As soon as a programme has been identi-
fied, the station name including a regional
identifier, if applicable, will appear in the
display, for example, NDR1 NDS (regional
programme in Lower Saxony, Germany).
When RDS is activated, the station buttons
become programme buttons. You now know
exactly which programme you have tuned
into, making it easy to find the desired station
quickly.
But RDS offers you further advantages:
AF - Alternative frequency
The AF (Alternative Frequency) function
makes sure that the strongest frequency of
the currently selected programme is always
tuned in automatically.
This function is activated when “AF” appears
in the display.
In order to switch this function on or off,
• press the AF button briefly.
The radio will switch to mute briefly while
searching for the strongest reception signal.
If “SEARCH” appears in the display when
switching on the radio or recalling one of the
