218
Digital Signal Analysis
For quantized I/Q values, the peak value is output in discrete form
only since no averaging is performed in the calculation. The rms
modulation error can be calculated within the limit values specified
in the following table. The limit values are obtained for quantized
I/Q values:
Order
MER
RMS
MER
PK
MER
PK
MER
dB
of QAM
min
min
min
max
4
0.5 %
1.563 %
98.44 %
46 dB
16
0.5 %
1.398 %
43.32 %
46 dB
32
0.7 %
1.976 %
29.33 %
43 dB
64
0.5 %
1.364 %
20.46 %
46 dB
128
0.7 %
1.952 %
13.66 %
43 dB
256
0.5 %
1.356 %
9.471 %
46 dB
The term “Modulation Error Ratio” and the prescribed method of
calculation were declared an international standard by the DVB
Measurement Group.
Содержание AMM-806
Страница 86: ...79 TVCB PC Installation ...
Страница 93: ...86 SMI Installation Torque Patterns 1 Start Here 2 3 4 5 6 1 Start Here 2 3 4 4 PORT 8 PORT ...
Страница 125: ...118 Fiber Optics Fiber Loss vs Path Length Single Mode 1550 nm ...
Страница 156: ...149 Cable TV Channel Format NTSC NTSC Composite Video Waveform ...
Страница 157: ...150 US Frequency Spectrum ...
Страница 158: ...151 FCC Aeronautical Band Frequencies Used for Communication and Navigation ...
Страница 171: ...164 F C x 32 Temperature Conversion Nomograph C F FAHRENHEIT F CELSIUS C 9 5 C F 32 5 9 KELVIN K K C 273 ...
Страница 175: ...168 Common CATV Symbols ...
Страница 176: ...169 Common CATV Symbols ...
Страница 177: ...170 Digital L Band Distribution Symbols ...
Страница 178: ...171 Digital L Band Distribution Symbols ...
Страница 183: ...176 Typical Cable Attenuation Chart in dB 100 Feet 68 F 20 C ...
Страница 187: ...180 Echo Rating Graph ...
Страница 188: ...181 Signal to Interference Limits Non Coherent Carriers ...
Страница 190: ...183 Heterodyne Modulator Analog ...
Страница 191: ...184 Heterodyne Processor Analog ...
Страница 213: ...206 Multiplexers ...
Страница 215: ...208 Antenna Stacking Methods to Increase Received Signal Level NOTE Refer to Antenna Spacing Chart for dimensions ...
Страница 216: ...209 Antenna Spacing Mounting Channelized Antennas on the Same Mast NOTE Refer to Antenna Spacing Chart for dimensions ...
Страница 285: ...Rev 8 0 ...