Tuning The Time Division Multiplex (Tdm) Frequencies Manually - JVC FR-DS100 Instructions Manual

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.
1
When 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
2
Use 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)
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.
... Ô GRID12 L Ô GRID12 R Ô GRID13 L Ô ...
... Ô GRID82 R Ô GRID 1 L Ô ...
3
When the correct grid number and polarity is
selected, broadcaster reception begins and
normal operation returns.
(clockwise)
TUNING/SELECT
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
1 34
2 39
3 44
4 49
5 55
6 60
7 44
8 49
9 55
10 60
11 76
12 81
13 44
14 49
15 55
16 60
17 76
18 81
19 1
20 82
This data current as of May 1999. For more details,
contact a WorldSpace service center.
Polarity Frequency (MHz)
R 1468.564
L 1470.864
L 1473.164
R 1475.464
R 1478.224
L 1480.524
R 1473.164
L 1475.464
L 1478.224
R 1480.524
R 1487.884
L 1490.184
R 1473.164
L 1475.464
L 1478.224
R 1480.524
R 1487.884
L 1490.184
L 1453.384
R 1490.644
17