Below are the most common formula's you will run into while working with the WSR-88D Weather RADAR System.
dB = 10 log Pout / Pin |
dBm = 10 log Pout / 1mw |
Duty Cycle (DC) =PW@3dB x PRF |
DCdB = 10 log DC |
Pavg = Ppeak x DC |
Ppeak = Pavg / DC |
dBmavg = 10 log Pavg / 1mw |
dBmpeak = 10 log Ppeak / 1mw |
dBmavg = dBmpeak + DCdB |
dBmpeak = dBmavg - DCdB |
Pavg = (dBmavg / 10) Antilog x 1mw |
Ppeak = (dBmpeak / 10) Antilog x 1mw |
Microwave loss = dBmant- dBmxmt (Note: Average or Peak) |
Microwave loss = 10 log Pant / Pxmt (Note: Average or Peak) |
For converting 3dB, 4dB, or 6dB PW measurement points to a percentage, for use on the TDS-420 Oscilloscope automatic measurements, the formula is: % = (-XdB / 20) Antilog x 100 |