CMMB Modulator,Cello-GAF  Download
Main Feature
 Compliant with CMMB GY/T 220.1-2006 and GY/T 220.2-2006
2 TS ASI inputs for 188 byte, Packet Mode and Burst Mode
Support Ⅰ, Ⅱ, Ⅲ modulation modes
RS code: (240, 240), (240, 224), (240, 192), (240,176)
LDPC: 1/2, 3/4
Guard Interval: 1/4,1/8
Constellation: BPSK, QPSK, 16QAM
Scrambler Mode: Ⅰ~ Ⅷ mode
Support SFN and MFN
Channel Bandwidth: 8MHz
MAX Time Slot: 40
MAX Remux Frame: 40
RF agile for VHF or UHF with step 1Hz
MER>40dB, Shoulder>50dB
External 1pps and 10MHz Clock inputs
Linear and non linear pre-correction
Front panel control and RS-232 remote control
Linear Pre Amplifier option
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Technical
Specification
TS Input:
Compliant with EN 50083-9 ASI interface standard
2 ASI input 188 packet, Packet mode and Burst mode
Bit Rate adaptation, Null Packet Filtering, PID Processing
Connector type: BNC female, Impedance 75Ohm
TOD Input:
Connector type: RS 232 serial, DB 9 female
Modulation and channel coding:
Support Ⅰ, Ⅱ, Ⅲ modulation modes
RS code: (240, 240), (240, 224), (240, 192), (240,176)
LDPC: 1/2, 3/4
Constellation: BPSK, QPSK, 16QAM
Scrambler Mode: Ⅰ~ Ⅷ mode
Channel Bandwidth: 8MHz
MAX Time Slot: 40
MAX Remux Frame: 40
Configure Transmitter ID
CMMB Network:
SFN: Time offset setting, Tx ID setting
MFN: BR adaptation, NIT update, Static delay
Management of Tx ID, Tx Time offset and Tx Power
Linear Pre-correction:
Spectrum tilt adjustment: +/12dB, step=0.2dB
Useful Bandwidth: 7.61MHz
Number of Pre correction points: 32
Amplitude pre correction: +/-3dB
Group Delay pre correction: +/-500ns
Alarm:
DB-9 with 2 Contact Relays for alarms: TS Sync Loss,Data error, Bit rate Overflow, 1pps or 10MHz loss, TOD Loss, SFN loss, Temperature high etc
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RF Output:
Central frequency: VHF or UHF by 1Hz
Signal level(Main): 0~10 dBm by 0.1dB step
Signal stability: +/- 0.2dB
Modulation error ratio(MER): >40dB
Shoulder: >50dB @ +/-4.2MHz from central frequency
Spurious: <-50dBc
Return loss: >15dB
Connector type: BNC female, Impedance 50 Ohm
RF Amplifier Option:
Ultra linear amplifier for VHF, UHF Bands
Gain 10- 15dB
Gain Flatness <1dB
Gain Stability <0.1dB
Return loss: >15dB
Connector type: N female, Impedance 50 Ohm
Clock Reference:
Internal 10MHz
Stability: 0.5ppm(typ); 3.0ppm(full temperature range)
Aging: 0.8ppm; Output level: 0dBm +/- 3dB
External 10MHz
Input level: -5dBm to +10dBm
Input connector type: N female, 50 Ohm
External 1pps reference
Input level: TTL level 5 KOhms; Pulse width: 1us Input connector type: BNC female
Loss of Reference Signal 1pps, 10MHz management
Control Mode:
Local control: 6 buttons, LCD screen, LED
Remote control: IP Ethernet RJ-45 or RS232
SNMP (Option)
Physical conditions:
Power supply:AC 90-260V+/-10%, 80W
Operating temperature: 0-50℃
Storage conditions:
-10-70℃, humidity 10%-80% at 50℃
Dimension: L=540mm, W=483mm, H=44mm (1RU)
Weight: Net 7 kg, Gross 10 kg |
