
- 25 -
HDE 400
—> The "Channel / Frequency" – "
FREQ
" submenu is activated.
C
hannel
/ f
requenCy
In this menu you adjust the output channel or the output frequency of the modu-
lator.
Bx 2
C69
FREQ
858.00 MHz
—> The signal is normally transmitted with a bandwidth of 8 MHz.
This means that you can only use the channel centre frequency
of the existing channel grid in the range of channels S21…S41
and C21…C69 (frequency grid 8 MHz). The CCIR channel grid
is 7 MHz in the range of the lower frequency bands (channels
C5 … C12). If 8 MHz QAM signal packages are transmitted in
these channel ranges, this will result in interference (overlapping)
and transmission problems.
For programming in these channel ranges and in the frequency rang-
es below them, we recommend starting with frequency 306 MHz
going back in steps of 8 MHz (see frequency table on page 49).
Please note thereby that many receivers cannot receive the channel
ranges S21 … S41 (306 … 466 MHz).
• Use buttons
to select the cursor position for channel resp. frequency
setting.
• Use buttons
to adjust the desired channel resp. frequency.
• Press the
button.
If COFDM modulation is selected in menu "RF output" (page 23):
—> Continue with "COFDM output signal" – "
COFDM-MODE
Please take note of the tables from page 27 on before setting the
COFDM parameters.
If QAM modulation is selected in menu "RF output" (page 23):
—> The "Output symbol rate, QAM modulation" – "
QAM-MODE
" sub-
menu is activated.
Содержание HDE 400
Страница 1: ...Assembly Instruction HDE 400 ...