... DTV STB Specificationu MODEL No.: GTR-GK1840u Category: DVB-T /T2 HD H.264/MPEG-4/MPEG-2 ü ... External USB PVR function: x1 u TUNERTuner: DVB-T/T2Receiving Frequency: VHF 174~230MHz; UHF 474~858MHzInput ... signal level: -20~-81dBmu DemodulationCompliant with: DVB-T/T2Demodulation: COFDM QPSK / 16QAM / 64QAM/256QAMGuard interval Modes: ... .54,4.76,5.71,6.66,7.61,9.51MHz Normal1.57,4.86,5.83,6 ...