The AT278USB is a USB based interface device suitable for DVB-T/H/C & ATSC 8-VSB Transport Stream Generation and IF as well as full range VHF & UHF IF up conversion.

The device communicates with the PC via the USB interface device. The AT278USB is capable of modulating a DVB-T/H/C TS from the harddisk of the PC or from the incoming DVB-ASI/SPI inputs. The modulated DVB-T/H/C is available on both IF and RF outputs as well as DVB-ASI output (for monitoring). The modulation options, output frequencies and all other setting are done with the help of the included DVSStation3 software.

• Combined COFDM, QAM & ATSC Modulator with VHF & UHF Upconverter
• High Speed USB 2.0
• Windows 2000, XP Drivers and SDK
• Free DVSStation3 Alitronika's Application Software
• Supports DVB According to Standard A1010 Rev1 & EN50083
• Modulation of Transport Stream files from Harddisk
• Modulation of TS from the ASI or SPI inputs
• All modulation processes are carried out by the hardware so that there is no load on the PC processor
• TPS flags to indicate TS contains MPE-FEC and/or Time slicing
• Bitrates from 4.98 MB/s to 31.67 MB/s. for DVB-T/H and from 14 MB/s to 65 MB/s. for DVB-C
• Supports Burst or continuous modes, 188 and 204 packet sizes
• Bitrates:
  • DVB-T/H : 4.98 MB/s to 31.67 MB/S
  • DVB-C : 14 MB/s to 65 MB/S
  • ATSC : 10.76 MBaud to 19.30 MBaud

IF & RF Specifications

• IF & RF Connector: 75 Ohms BNC.
• IF Output Frequency: 35/37 or 69/71MHz adjustable in 1Hz steps
• IF Output level: 0dBm @ 75Ohms.
• RF Output Frequency Range: 50MHz to 1000MHz.
• RF Output power over bandwidth: -15dBm to -50dBm.
• FEC Code Rates: 1/2, 2/3, 3/4,5/6, 7/8.
• Spectral Inversion: Both inverted and non-inverted.
• Guard Interval Modes: 1/32, 1/16, 1/8 and 1/4.
• DVB-T/H Mode
  • Channel Bandwidth: 5MHz, 6MHz, 7MHz, 8MHz.
  • COFDM Spectrum: 2k, 4k and 8k carriers non-hierarchical.
  • Standards: COFDM according EN 300 744.
  • Modulation Modes: QPSK, 16QAM and 64QAM.
• DVB- C Mode
  • Channel Bandwidth: 6MHz, 8MHz.
  • Standards: QAM according EN 300 744.
  • Modulation Modes: 16QAM,32QAM,64QAM,128QAM,256QAM.
• ATSC 8-VSB Spec
  • Channel Bandwidth: 6MHz
  • Standards: A/53 8-VSB

ASI/SPI Specifications

• On Board Buffer: 16Mbytes
• DVB-ASI I/O Connectors: 75 Ohms BNC.
• DVB-ASI Signal level: 1.0Vp-p nominal
• DVB-ASI Output Clock: 270 MHz.
• DVB-ASI Input return loss: 15dB.
• DVB-ASI I/O Bit Rate: 0 to Max Mbit/s*.
• DVB-SPI Connector: 25-pin sub-D.
• DVB-SPI Input Level: LVDS.
• DVB-SPI Input Bit Rate: 0 to Max Mbit/s*.
• Power Consumption: 7.5 Watts
• Size WxLxH: 170mmx210mmx65mm
• * Max Mbit/s = Maximum bit rate allowable by DVB-T/H or DVB- C modulation.