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DAB/T-DMB COFDM Modulator, Model:Bass-GAF
 Main Feature 

              1 Fully compliant with ETSI 300 799, ETS 300 401 standards
     1 Two ETI inputs in redundant mode with automatic and seamless Switching
    1 Support DAB 1,2,3,4 modulation modes
    1 3G Test Mode, SFN Test Mode
    1 Support SFN and MFN
    1 DAB mode, TII and Offset delay configuration by ETI
    1 Channel Bandwidth: 1.536MHz
    1 Option IF agile from 30MHz to 40MHz with step 1Hz
    1 RF agile VHF or L bands
    1 External 1pps and 10MHz Clock inputs
    1 Linear and non linear pre correction
    1 RS232 Control and Supervision or IP Web browser in option
    1 Exciter Ultra Linear Amplifier option
    1 Extra –90dB Attenuator option


Technical Specification


ETI Input:
 1 Fully compliant with ETSI 300799 ETI interface standard
 1 Data Bit Rate: 2.048Mb/s
 1 Data Format: NI(G703), NA5376(G704), NA5592(G704)
 1 Redundancy Mode: Manuel, Automatic and Seamless
 1 Connector type: BNC female, Impedance 75Ohm

Modulation and channel coding:
 1 Fully compliant with ETS 300401 standard
 1 Modulation: I,II,III,VI modes
 1 Support Dynamic Configuration
 1 Channel Bandwidth: 1.536MHz

IF Output Option:

 1 Central frequency: 30MHz to 40MHz, Step 1Hz
 1 Signal level(Main):0dBm to -10dBm by 0.1dB step
 1 Signal stability: +/- 0.5dB
 1 I/Q Amplitude Error: <0.05%
 1 I/Q Phase Error: <0.05 degree
 1 Modulation error ratio(MER): >40dB
 1 Shoulder: >50dB @ +/-970kHz from central frequency
 1 Spurious: 55dB relative to total power
 1 Return loss: >15dB
 1 Connector type: BNC female, Impedance 75 Ohm

Test Signal Modes:

 1 3G Mode
 1 SFN Test Mode
 1 Spectrum Hole

DAB/T-DMB Network:
 1 SFN: Offset delay insertion, 0-1 second, step 100ns
 1 MFN: Static delay insertion, 0-1 second, step 100ns
 1 ETI Control for DAB Mode, TII, Offset delay
 1 TII Infromation Insertion: Main ID, Sub ID

Alarm Management:
 1 2 Contact Relays to trigger external equipment
Alarm List: ETI Sync Loss, Bit Rate Overflow,
SFN Loss, Ext 10MHz Loss, 1pps Loss

Control Mode:
 1 Local control: 6 buttons, LCD screen, LED
 1 Remote control: RS232 & RS485 or WEB browser through IP Ethernet RJ-45 in option


RF Output:
 1 Frequency: L band or VHF bands
 1 Signal level(Main): 0dBm +/- 2dB
 1 Attenuation: 10dB adjustable by 0.1dB step
 1 Signal stability: +/- 0.1dB
 1 Modulation error ratio(MER): >38dB
 1 Shoulder: >48dB @ +/-1MHz from central frequency
 1 Spurious: 50dB relative to total power?
 1 Return loss: >10dB
 1 Connector type: N female, Impedance 50 Ohm
 1 RF Mute Mode: Direct and Progressive

RF Amplifier Option:
 1 Ultra linear amplifier for VHF, UHF Bands
 1 Gain 15- 25dB, Gain Flatness <1dB
 1 Gain Stability <0.1dB
 1 Return loss: >15dB

Extra –90dB Attenuator Option:
 1 Attenuation bandwidth: 48-900MHz
 1 Attenuation Step 1dB, Flatness <2dB

Clock Reference:
Internal 10MHz

 1 Stability: 0.5ppm(typ); 3.0ppm(full temperature range)
 1 Aging: 0.8ppm; Output level: 0dBm +/- 3dB

External 10MHz
 1 Input level: -5dBm to +10dBm
 1 Input connector type: N female, 50 Ohm

External 1pps reference
 1 Input level: TTL level 5 KOhms; Pulse width: 1us
 1 Input connector type: BNC female

Physical conditions:
 1 Power supply:AC 220V+/-10%, 80W
 1 Operating temperature: 0-50 degrees
 1 Storage conditions: -10-70 degrees, humidity 10%-80% at 50 degrees
 1 Dimension: L=540mm,W=483mm, H=44mm (1RU)
 1 Weight: Net 7 kg, Gross 10 kg



 Non linear Pre-correction:


Nb point

Abscissa range

Ordinate range




-12dB to +12dB

-6dB to +6dB




-12dB to +12dB

-25° to +25°


Linear Pre-correction:


Nb Point

Amplitude Correction

Phase Correction



±3dB; Step 0.1dB

±500nS; Step


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