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Satellite Broadcasting Instruments

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GATT verifies the performance of Gap Filler for Satellite DMB and provides various signals and performance measuring functions during development procedure.
For this, GATT provides TDM signal for providing input signal of Gap Filler and CDM signal as the output signal of Gap Filler. Plus, for verifying the performance of Gap Filler, it provides various performances after receiving signal from Gap Filler by measuring.

Development of high-quality Gap Filler
  • Provision of various types of standard signal
  • Provision of function analysis on Gap Filler Modulator
  • Provision of Gap Fillers function standard
Gap Filler manufacture and provision of maintenance instruments
 
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Function analysis on Gap Fillers output monitor after providing standard signal to satellite Gap Filler
Provision of various types of standard signal on DMB terminal
GATT-4000Bs actualization standard
  • TDM receptors required standard :EN 300 421 V1.1.2 Digital Video Broadcasting(DVB) framing structure, channel coding and modulation for 11/12GHz satellite services
  • CDM receptor standard : ITU-R BO.1130.3System description and selection for digital satellite broadcasting to vehicular, portable and fixed receiver in the bands allocated to BSS(sound) in the frequency range 1400-2700MHz"
Provision of easy user interface through GUI

Occurrence of TDM signal
  • Occurrence of TDM signal according to DVB-S standard
  • Regulation of TX Level, and C/N ratio
  • Regulation of TX Frequency
Occurrence of CDM signal
  • Occurrence of CDM signal according to System E standard
  • Regulation of TX Level, Eb/No, and channel ON/OFF function
Measurement of S CDM signal receptor
  • Data demodulation function (SER)
  • Code Domain Power measure
  • QPSK EVM(Error Vector Magnitude)
  • Composite EVM(Rho)
  • Gap Filler Delay Time measure function
  • Signal Constellation marking function
  • Spectrum marking function

TDM Output
Item Specifications
Frequency 1,476.5 MHz
Minimum-Maximum Output Power -65 dBm ~ -15 dBm
Frequency Stability 0.01ppm
Harmonic Response 45 dBc
OBW 25 MHz
CDM Output
Item Specifications
Frequency 2,642.5 MHz
Minimum-Maximum Output Power -20 dBm ~ 10 dBm
Frequency Stability 0.01ppm
Harmonic Response 60 dBc
ACPR 57 dB 3dB @ -10dBm ~ 10dBm
CCDF 9.5dB @ 0.01% / 11.1dB @ 0.0001%
OBW 20 MHz
CDM Input
Item Specifications
Frequency 2,642.5 MHz
Minimum-Maximum Output Power -20 dBm ~ 10 dBm
RSSI Accuracy 0.5 dB
Spectrum Input (CDM)
Item Specifications
Center Frequency 2,642.5 MHz
Bandwidth 50 MHz
Minimum-Maximum Input Power -10 dBm ~ 10 dBm
Resolution Bandwidth 30 KHz
Dynamic Range 50 dBc
Spectrum Input (TDM)
Item Specifications
Center Frequency 1,476.5 MHz
Bandwidth 50 MHz
Minimum-Maximum Input Power -10 dBm ~ 10 dBm
Resolution Bandwidth 30 KHz
Dynamic Range 50 dBc
Main Board CPU
Item Specifications
CPU MPC860 50MHz
Memory 64Mbytes
Flash Memory 16Mbytes
Ether-Net 10 Mbps
COM 4 x RS-232
OS Linux

Front Panel


  • Power SW : system ON/OFF switch
  • LCD Pannel : Used in systems state display and user interface. User interface is comprised of touch
                     screen which enable everyone to regulate systems easily.
  • REF 10MHz Output : Print out interior reference signal of 10MHz.
  • REF 10MHz Input : Used in mode with system reference that receives 10MHz signal from outside.
                     In this case user interface should be set to be using signals from outside.
                     (Refer to Users Manual)
  • TDM Baseband I output : Output of 1 CH. baseband signal of TDM signal.
  • TDM Baseband Q output : Output of Q CH. baseband signal of TDM signal.
  • TDM TX : Output of TDM signal with central frequency of 1476.5MHz.
                     Signal intensity is -65dBm ~ -15dBm.
  • CDM RX : Input port for CDM signal with central frequency of 2.6525GHz.
                     Input level is -20dBm ~ 10dBm.
  • CDM TX : Input port for CDM signal with central frequency of 2.6425GHz.
                     Input level is -20dBm ~ 10dBm.
Read Panel


  • Keyboard : Keyboard connection port.
  • Mouse : Keyboard connection port.
  • USB : USB connection port supporting USB 1.1.
  • Ether-Net : Ether-Net port supporting 10/100BASE-T Ethernet.
  • RS232C: serial port supporting RS-232 function.
  • Power Fan : Power Module radiant heat Fan.
  • Power Module ON/OFF SW : Power Module ON/OFF SW.
  • AC Power Input : 220VAC ac input port.
  • System FAN : Radiating fan for desktop.