SKD18 series IPQAM modulator adopts the compact 1U chassis, which can install 3 independent digital modules. Each module supports 1 Gigabit IP input, 4 arbitrary frequency RF outputs, and hot swapping. And also supports 12 RF outputs, with DTMB, DVBC (J.83A/B/C), DVBT, and ATSC modulation modes. SKD18 series is high performance and low cost, which is very suitable for using the digital TV headend systems in various business places (such as, hotels, clubs, restaurants, etc.).
Characteristics
1~3 pluggable IPQAM modules, each module has 1 Gigabyte IP input and 4 arbitrary frequency point RF outputs
IP input is available in unicast and multicast protocols, like UDP, IGMP V2/V3
TS stream re-multiplexing function
RF output is available in multi-standard modulation modes, such as, DVBC (J.83A/B/C), DVBT, DTMB, ATSC
RF output is agile, the frequency can be adjusted freely between 50-1000MHz
Technical Parameters:
Modulation Parameters
|
J.83A
|
Modulation standard
|
Annex A
|
|
Constellation
|
64QAM,256QAM
|
|
MER
|
≥36dB
|
|
Symbol rate
|
5-6.900Msps
|
|
J.83B
|
Modulation standard
|
Annex B
|
|
Constellation
|
64QAM,256QAM
|
|
MER
|
≥36dB
|
|
CABLE STANDARD
|
HRC,IRC or STD
|
|
Symbol rate
|
5-6.900Msps
|
|
ATSC
|
Modulation standard
|
8VSB
|
|
MER
|
≥36dB
|
|
DVB-T
|
Modulation standard
|
DVB-T COFDM
|
|
Bandwidth
|
6/7/8MHz
|
|
Modulation constellation
|
QPSK, 16QAM, 64QAM
|
|
Code rate
|
1/2, 2/3, 3/4, 5/6,
7/8
|
|
Protection interval
|
1/32, 1/16, 1/8, 1/4
|
|
Transmission mode
|
8K
|
|
MER
|
≥36dB
|
|
DTMB
|
Modulation standard
|
GB20600-2006
|
|
FFT
|
1,3780,1+pilot
|
|
MER
|
≥36dB
|
|
FEC
|
0.4,0.6,0.8
|
|
Frame pattern
|
420,595,945,420var,945var
|
|
Interleaving depth
|
240,720
|
|
Constellation
|
4QAM-NR,4QAM,16QAM,
32QAM,64QAM
|
Re-multiplexing
|
Automatic generation of
PSI/SI tables
|
|
PID mapping
|
Physical parameter
|
Dimension
|
Standard 19” 1U
rack 480*365.93*43.8
|
|
Operating temperature,
humidity
|
-10℃-45℃、40%-70%
|
|
Storage temperature,
humidity
|
-40℃-70℃、40%-95%
|
Power supply
|
Supply voltage
|
80~264VAC
|
|
Maximum current
|
1.8A/115VAC, 1A230VAC
|
IP Input
|
Input stream format
|
Unicast and multicast
protocols, UDP, IGMP V2/V3（SPTS）
|
RF output
|
RF frequency range
|
50-1000MHz
|
|
Output electrical level
|
Adjustment range
0-20dB，stepping 0.5dB
|
|
Out-of-band rejection
|
≥60dB
|
|
Output impedance
|
75Ω
|
