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238 Chapter 22
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: 1
Code Rate: 0.8
Interleaver Type: B=52, M=720
Frame Header: PN595
PN Phase Change: True
Insert Pilot: False
EVM
Operating range 0 to 8%
Floor 1.36%
Accuracy
from 1.4% to 2.0%
from 2.0% to 8.0%
±0.60%
±0.50%
MER
Operating range ≥ 22.00 dB
Floor 37.53 dB
Accuracy
from 34 to 37 dB
from 22 to 34 dB
±2.81 dB
±1.62 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.