This page contains on-line calculators and other software tools useful when designing a telecommunications system. Using these tools can save you time from calculations. They are useful for the telecommunication engineer and highly recommended for the radio amateur that does not want to spend too much time and effort on calculations.

LCR calculations:

• Resonance frequency of an L/C circuit, calculate F, C, L
• Impedance of a capacitor or inductor
• Two resistors or inductors in parrallel or two capacitors in series

Electric and magnetic fields:

• Path loss in free space for space communications
• Gain of a parabolic antenna
• K-factor of an antenna (for conversion from dBuV to fieldstrength)
• Conversion of dBm from a reception antenna to power density / fieldstrength
• Field strength of a transmitter in free space
• Magnetic field strength close to a loop antenna

Conversions between dB's volts, ampere, watts etc.:

• volts, ampere, watts to dB values and vv
• dBuV, dBuA to dBm and vv
• Overall gain in dB knowing the input and output powers
• mW to dBm and dBm to mW conversion

Noise:

• Galactic noise
• Overall Noise Figure and gain of Two Stage Amplifier

Various:

• Windings on a toroide
• Circular Orbit Satellite Data
• Temperature conversion calculator
• Waveguide Cutoff Frequency & Attenuation
  

Specific:

• Limits lin and log with frequency
• Limits per oct
• EMC test setup with long wire