Grundig YB500 User Manual download pdf (Page 28)

Special Functions on FM

The RDS-Q special function remains effective for approx. 1 minute

and then automatically switches to the indication of the

programme chain name. It is also possible to switch the RDS-Q

indication to the programme chain name indication by pressing

the LSB/USB button once again.

Please note:

The indication of the programme chain name is only effected if the

RDS reception quality is sufficient, and the indication of the RDS

quality is only possible if the RDS sign is indicated too.

Calling Up Alternative Frequencies (AF)

RDS (Radio Data System)

RDS is a digital information system, the signals of which are

broadcasted in addition to the FM radio programme. Your radio is

equipped for operation with this information system. It evaluates

the codes for programme identification (PI), programme service

(PS), and alternative frequencies (AF).

It is thus possible for the radio to indicate the name of the

programme chain (stations broadcasting the same programme)

and to compare the different stations of the same programme

chain.

To ensure a correct decoding of the RDS signals, certain demands

are made on the reception quality of RDS broadcasts. This is

especially true when the telescopic aerial is used for reception.

The first condition for correct RDS reception is a sufficient signal

strength. This means that the TUNING (field strength) indication

should reach its maximum deflection. A further condition is the

indication of the RDS sign. If these two conditions are met, the name

of the programme chain will be indicated within 10 seconds. If this

should not be the case, decoding of the RDS signal is probably

impaired by multipath reception (reflections). In most cases, this

distortion is not signalled through an unstable TUNING (field

strength) indication. At the most, the RDS indication might be

unstable. In technical jargon, this effect is called

The RDS reception quality is insufficient.

A special function of your unit enables the indication of the RDS

reception quality.

Pressing the LSB/USB button © switches the eight-position

alphanumeric indication to the RDS quality indication:

Q ...........

Try to improve the RDS reception quality by changing the

position of the telescopic aerial (tilt and/or rotate). This means

that as many segments as possible should be indicated. The figure

shows the maximum possible number of 16 sensitivity grades

(vertical bars).

This indication corresponds to 100 % RDS reception quality

(respectively 0 % error rate).

Especially when operating the radio inside a building, the

location of the radio can be of great importance for the RDS

reception quality. If necessary, try to install the radio at a location

giving better results.

If the RDS sign and the programme chain name are both indicated,

you can call up the alternative frequencies of this programme

chain.

Pressing the FM/RDS-AF button starts scanning of t broadcasted

alternative frequencies.

During this function, the indication AF appears in the disp lay

(4).

The individual frequencies are then checked for their field strength

(worthy of reception or not). If the field strength suffices for correct

RDS reception, scanning is aborted. The respective frequency is

indicated and the unit switches off the muting function which has

been activated at the beginning of the scan (call-up) function. If

none of the alternative frequencies is worthy of reception the radio

tunes to the initial frequency again.

Hint

Short pressure on the FM/RDS-AF button =

the alternative frequencies are indicated in increasing

order.

Long pressure on the FM/RDS-AF button =

the alternative frequencies are indicated in decreasing order

1 2 ... 23 24 25 26 27 28 29

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Grundig YB500 User Manual Page 28

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