
The voltage shown will not be accurate, since this is a rectifier probe (diode probe), but the measurements are good enough for you to be able to determine where the RF stops, or if a stage is not giving the gain you think it should.
RF Probe Schematic
RF Probe Notes:
where:
Vmeasured is RF probe output voltage.
0.35 V is diode forward voltage (actual for BAS70)
/ 2^0.5 is peak to effective voltage
50 is load impedance
Source: RF Detector / RF Probe
RF Probe Schematic
RF Probe Notes:
- Maximal rated power is defined by 50 Ohm resistor (use more resistors connected in parallel) and maximal reverse voltage of diode. (for BAS70 70V)
- Compute output power from measured voltage:
Pout=(( Vmeasured + 0.35 V ) / 2^0.5 )^2 / 50
where:
Vmeasured is RF probe output voltage.
0.35 V is diode forward voltage (actual for BAS70)
/ 2^0.5 is peak to effective voltage
50 is load impedance
Source: RF Detector / RF Probe
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