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HDMA 784 C ASI
ASI input
Standard: .....................................................................DIN EN 50083-9
Format: ..............................................................MPEG ISO IEC 13818-1
User data rate: ...............................................................1 … 180 Mbit/s
Level (input / output): .................................................... 800 mVPP ± 10%
Return loss (input):...............................................> 17 dB (5 … 270 MHz)
HF output
Channels: ............................................................................ S21 … C69
Frequency range: ............................................. 42.0 MHz … 868.0 MHz
Types of modulation: ..................................QAM 4, 16, 32, 64, 128, 256
Output level: ............................................................................. 83 dBμV
Output impedance: ......................................................................... 75
Ω
Symbol rate: ................................................................ 1000…7500 kBd
Connections:
SAT inputs: ............................................................................ 2 F sockets
ASI input ........................................................................... 1 BNC socket
HF output: .............................................................................. 1 F socket
Connection strip (20-pin): .......................for supply voltages and control circuits
Common Interfaces: .....................2 (several channels can be descrambled).
2.4 d
esCription
The Head-end Digital Transmodulator QAM "HDMA 784 C ASI", in the fol-
lowing called QAM module converts two DVB-S/DVB-S2 (also 16/32 APSK)
modulated data streams into four DVB-C (QAM) modulated data streams. The
QAM module has two SAT-IF inputs, one ASI input and one HF output.
Tuner "
A
"
SAT IN "
A
"
ASI IN
RF OUT
Tuner "
D
"
TPS
TPS
TPS
TPS
CA-Modul
CA module
CA-Modul
CA module
Tuner "
B
"
Tuner "
C
"
SAT IN "
B
"
Modulator
"
A
"
Modulator
"
B
"
Modulator
"
C
"
Modulator
"
D
"
Combiner
LNB
In A
Bx 4A
10600 MHz
Bx 4
0 x ASI
ASI
OFF
