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Chapter 22 237
DTMB Measurement Application
N6156A, DTMB Measurement Application
Description Specifications Supplemental Information
16 QAM EVM
ML
a
= –20 dBm
20 to 30 °C
a. ML (mixer level) is RF input power minus attenuation
Sub-carrier Number: 3780
Code Rate: 0.8
Interleaver Type: B=52, M=720
Frame Header: PN420
PN Phase Change: True
EVM
Operating range 0 to 7%
Floor 0.60%
Accuracy
from 0.6% to 1.4%
from 1.4% to 2.0%
from 2.0% to 7.0%
±0.30%
±0.30%
±0.70%
MER
Operating range ≥ 23.00 dB
Floor 44.54 dB
Accuracy
from 37 to 44 dB
from 34 to 37 dB
from 23 to 34 dB
±2.96 dB
±1.09 dB
±0.89 dB
Frequency Error
b
b. The accuracy specification applies at the EVM =1%.
Range –100 kHz to 100 kHz
Accuracy
±10 Hz+tfa
c
c. tfa = transmitter frequency frequency reference accuracy.