Analayzing RF Signal using an Oscilloscope
Posted on 2009-04-07
I have a wireless device that transmits in the 900 - 928 MHz range. I would like to observe Voltage v. Time waveform of the transmitted RF signal on an Oscilloscope. I tried using a 8cm long wire as an antenna and connected it to the oscilloscope probe. But the oscilloscope did not display anything. Next I tried using an antenna from a wireless router but that did not work too. Now I do not know if the antenna that i am using is too trivial or if the signal strength is too low to be displayed on the oscilloscope without an amplifier.
I have no experience with RF, so do not know if it is possible to measure RF Signals using oscilloscope. If it is possible what should i do to achieve this? If an oscilloscope cannot be used, are there other instruments that could be used to observe Voltage v. Time waveform of an RF Signal? I really appreciate any help. Thanks