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Chapter 23 245
CMMB Measurement Application
N6158A, CMMB Measurements Application
Channel Impulse Response
Spectrum Flatness Amax-Ac (dB) (Limit +0.5)
Amin-Ac (dB) (Limit -0.5)
Amax: max amplitude value
Amin: min amplitude value
Ac: center frequency amp value
Result Metrics MER (dB), EVM (%), Mag Error
(%), Phase Error (deg) RMS, Peak
(Peak Position)
MER (dB) and EVM (%) by Data,
Continuous Pilot, Scattered Pilot
Frequency Error (Hz)
Quadrature Error (deg)
Amplitude Imbalance (dB)
Timing Skew (us)
Trigger Difference (us)
TxID (Region Index, Transmitter
Index)
Inband Spectrum Ripple Amax-Ac
(dB)
Amin-Ac (dB)
Description Specifications Supplemental Information
CMMB Modulation Analysis
Specification
ML
a
= –20 dBm
20 to 30 °C
CLCH+SLCH0
CLCH: Timeslot 0, LDPC 1/2,
Reed Solomon Code (240,240),
Interleaving Mode1, Mod Type
BPSK
SLCH0: Timeslot 1-39, LDPC 1/2,
Reed Solomon Code (240,240),
Interleaving Mode1, Mod Type
16QAM
Description Specifications Supplemental Information