Tuning the Time Division Multiplex (TDM) frequencies manually

The L-band frequency range used for WorldSpace broadcasters is divided into a grid comprised of 82 blocks of 460 kHz segments. With this unit, it is possible to tune the individual grid positions and polarities manually.

If you are able to receive WS broadcasters, it is NOT necessary to perform this operation. However, there may be occasional changes in the transmitted signal which may require use of this function. Worldspace will inform you of any alteration in the frequency range available in your area.

1When the power is on, press and hold the WS button for 3 seconds or more.

The currently received TDM grid number and polarity (L or R) appear in the display.

WS

2Use the rotary encoder dial to select the TDM frequency. Turn the rotary encoder dial clockwise for higher grid numbers, and counterclockwise for lower grid numbers.

(counterclockwise)(clockwise)

TUNING/SELECT

The order of the TDM frequencies changes in the display as follows. When the highest grid position (GRID 82R) is reached, the count will continue on from the lowest position (GRID 1 L) and similarly in the reverse direction.

... ï GRID12 L ï GRID12 R ï GRID13 L ï ...

... ï GRID82 R ï GRID 1 L ï ...

3When the correct grid number and polarity is selected, broadcaster reception begins and normal operation returns.

The graph below shows the current grid positions and polarities corresponding to the area preset numbers shown in the maps on page 18.

Preset

Grid

Polarity

Frequency (MHz)

 

 

 

 

1

34

R

1468.564

 

 

 

 

2

39

L

1470.864

 

 

 

 

3

44

L

1473.164

 

 

 

 

4

49

R

1475.464

 

 

 

 

5

55

R

1478.224

 

 

 

 

6

60

L

1480.524

 

 

 

 

7

44

R

1473.164

 

 

 

 

8

49

L

1475.464

 

 

 

 

9

55

L

1478.224

 

 

 

 

10

60

R

1480.524

 

 

 

 

11

76

R

1487.884

 

 

 

 

12

81

L

1490.184

 

 

 

 

13

44

R

1473.164

 

 

 

 

14

49

L

1475.464

15

55

L

1478.224

 

 

 

 

16

60

R

1480.524

 

 

 

 

17

76

R

1487.884

18

81

L

1490.184

 

 

 

 

19

1

L

1453.384

20

82

R

1490.644

This data current as of May 1999. For more details, contact a WorldSpace service center.

17

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Image 17
JVC FR-DS100 Tuning the Time Division Multiplex TDM frequencies manually

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