Tektronix MTM400A, Техническое описание

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Specifications
MTM400A Specifications and Performance Verification
1- 5
Table 1- 9: QAM Annex A interface card characteristics
Characteristic Description
Input Frequency Range 51 MHz to 858 MHz, 62.5 kHz steps
Modulation Format 16 QAM, 64 QAM, 256 QAM (compliant with DVB-C ETS 300 421)
Modulation Baud Rate, QAM A 5.0 Mbaud/s minimum, 6.952 Mbaud/s maximum
Input Signal Level --57 dBm (50 dBuV) to --27 dBm (80 dBuV), with a 16, 64, and 256 QAM input,
providing five or fewer Transport Error Flags in 10 seconds, which corresponds to
a post FEC rate of 1e
--8
Modulation Error Ratio (with equalizer) 38 dB min, with a 64 QAM input and 256 QAM input
Receiver Bandwidth, QAM A 8 MHz nominal
Input Termination Impedance 75
Ω
nominal
Input Return Loss 6 dB min, 10 dB typical, 51 MHz to 858 MHz
Loop Through Power Gain 1.5 dB to 4 dB typical, 51 MHz to 858 MHz typical
Loop Through Noise Figure 8 dB typical
Loop Through Output Return Loss Greater than 10 dB typical
Table 1- 10: QAM Annex B2 interface card characteristics
Characteristic Description
Input Frequency Range 88 MHz to 858 MHz
Input Signal Level --64 dBm to --19 dBm (45 dBuV to 90 dBuV relative to 75
Ω
)
(With either a 64 or 256 QAM input, there are five or fewer Transport Error Flags
in 11 seconds, which corresponds to a post FEC rate of 1e
--8
)
≥
-55 dBm to ensure compliance to EN 55103-2 immunity
Modulation Format 64QAM, 256QAM (compliant with ITU J-83 Annex B)
Interleaving Mode Level 1 and Level 2 interleaving support compliant with all ITU J-83 Annex B,
excluding I, J = (128,7) and (128,8), and in 256 QAM excluding (8, 16) and
(16, 8)
Modulation Baud Rate 64 QAM: 5.056941 Mbaud/s
256 QAM: 5.360537 Mbaud/s
Spectrum Polarity Demodulates both Normal and Inverted IF Spectrum.
Receiver Bandwidth, QAM B 6 MHz nominal
Connector Type F type
Input Termination Impedance 75
Ω
nominal
Input Return Loss 5 dB typical
Ultimate Modulation Error Ratio with Equalizer
≥
37 dB with equalizer; typical