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Free Tools:
DspSee
PC Oscilloscope
Signal Generator
Attenuator Design
PLL Design
Tutorials:
Amp. Modulation
Freq. Modulation
Phase Modulation
AM, FM & PM
PAM
PWM
Jitter
Rise/Fall Times
Scope Conn.
Calculators:
mW to dBm
dBm to mW
RF Calculator
Link Budget
ARFCN Calculator
CMRR Calculator
Tables:
mW to dBm
dBm to mW
VSWR to RL
RL to VSWR
NF to NT
NT to NF
ASCII Table
RF Spectrum
Integration
Differentiation
Trignometry
ARFCN Table
CMRR Table
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Radio Frequency (RF) Spectrum
| Wavelength |
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Frequency |
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Band |
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Applications |
| 0.1 mm |
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3 THz |
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Experimental |
| 1 mm |
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300 GHz |
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Extremely High Frequency
EHF |
Millimeter wave seeker/sensor
Navy auto carrier landing
Artillery location radar
Strategic satellite communications |
| 1 cm |
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30 GHz |
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Super High Frequency
SHF |
Common carrier microwave
Radio navigation
Satellite television
Precision approach radar |
| 10 cm |
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3 GHz |
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Ultra High Frequency
UHF |
Air-ground communications
Television (420 - 890 MHz)
Navigational Aids
Cellular radio |
| 1 m |
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300 MHz |
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Very High Frequency
VHF |
Citizens band radio
Television (54 - 88 MHz)
Commercial FM (88 - 108 MHz)
Navigational aids: VOR/ILS |
| 10 m |
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30 MHz |
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High Frequency
HF |
Commercial communications
Over-the-horizon radar
Citizens band radio
Amateur radio |
| 100 m |
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3 MHz |
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Medium Frequency
MF |
Commercial AM radio (0.54 - 1.6 MHz) |
| 1 km |
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300 KHz |
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Low Frequency
LF |
Loran C navigation
Amateur radio |
| 10 km |
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30 KHz |
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Very Low Frequency
VLF |
Omega navigation |
| 100 km |
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3 KHz |
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Ultra Low Frequency
ULF |
Military |
| 103 km |
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300 Hz |
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Super Low Frequency
SLF |
Military |
| 104 km |
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30Hz |
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Extremely Low Frequency
ELF |
Military |
| 105 km |
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3Hz |
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References:
Introduction to Digital Communication, Rodger E. Ziemer, Roger L. Peterson.
Communication systems engineering, John G. Proakis, Masoud Salehi.
Communication Systems, 4th Ed., Simon Haykin.
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