- 27 -
HDMT 1000 ASI LAN / HDMT 1001 C
• Press the
button.
—> The menu "Hierarchical modulation" –
"
INPUT Priority:
" is activated.
h
ier arChiCal
modul ation
In order to attain with less field strength a greater range for broadcasters,
with DVB-T so-called "hierarchical modulation" is used. In this process, several
data streams are modulated onto a DVB-T data stream using "Quadrature
Amplitude Modulation" (QAM). The robust "High Priority" data stream (HP)
with a lower data rate is modulated onto the more sensitive "Low Priority" data
stream, which possesses a higher data rate. In good reception conditions, the
receivers can receive both data streams; in poorer reception conditions, only
the "HP" portion.
Bx 4A
Priority:
high
INPUT
• By pressing
set to "
high
" or "
low
"
(not relevant in the case of standard modulation).
• Press the
button.
—> The menu "Station filter " – "
PROGRAM
" is activated.
s
tation
filter
If no station is found the error message "
FILTER no Service
" is displayed.
Check the configuration of the antenna system and head-end station as well as
the previous settings of the cassette in question.
If the input signal path "
A+B+ASI=1 ASI=2
" is selected the station filter of
channel strip "
B
" is used in the channel strip "
A
". Therefore perform the setting
for channel strip "
B
" (input channel) according to page 26, before activating the
"Setting the station filter" – "
PROGRAM
" menu.
If the input signal path "
A+ASI=1 B+ASI=2
" or "
A+ASI=1 A+ASI=2
" is se-
lected the channel strips can be programmed one after the other.
