106
1. The Carrier/Noise contribution of a single amplifier when the
Noise Figure (NF) is known:
2. To Sum Identical Carrier/Noise Ratios:
See charts & examples starting on pages 84.
3. To Sum Different Carrier/Noise Ratios:
See examples starting on pages 84.
4. Carrier/Noise Ratio vs Bandwidth:
Rule: For every 1 dB increase in input signal level, the C/N improves by 1 dB.
For every double the number of amplifiers with identical Carrier/Noise Ratios
there is a degradation of 3 dB in the total C/N.
FCC Requirement C/N = 43 dB
10
10
10
N = Number of equal
contributors
NF = Noise Figure
-59.2 = Thermal Noise
in 4 MHz
Bandwidth (dBmV)
Carrier/Noise
System Calculations
Summary of Contents for AMM-806
Page 86: ...79 TVCB PC Installation ...
Page 93: ...86 SMI Installation Torque Patterns 1 Start Here 2 3 4 5 6 1 Start Here 2 3 4 4 PORT 8 PORT ...
Page 125: ...118 Fiber Optics Fiber Loss vs Path Length Single Mode 1550 nm ...
Page 156: ...149 Cable TV Channel Format NTSC NTSC Composite Video Waveform ...
Page 157: ...150 US Frequency Spectrum ...
Page 158: ...151 FCC Aeronautical Band Frequencies Used for Communication and Navigation ...
Page 175: ...168 Common CATV Symbols ...
Page 176: ...169 Common CATV Symbols ...
Page 177: ...170 Digital L Band Distribution Symbols ...
Page 178: ...171 Digital L Band Distribution Symbols ...
Page 183: ...176 Typical Cable Attenuation Chart in dB 100 Feet 68 F 20 C ...
Page 187: ...180 Echo Rating Graph ...
Page 188: ...181 Signal to Interference Limits Non Coherent Carriers ...
Page 190: ...183 Heterodyne Modulator Analog ...
Page 191: ...184 Heterodyne Processor Analog ...
Page 213: ...206 Multiplexers ...
Page 285: ...Rev 8 0 ...