My goal is to measure the reflected power from a DUT. I am using a Transmission/Reflection test set from Agilent to sample the reflected power and pass it to the PXI-5660. I sweep the signal over a range of 100 MHz to 500 Mhz and measure the reflected power signal at each point. A calibration sweep is taken first with a short at DUT end of the cable. I also sample the incident power with the T/R test set. The output signal is typically 0 dBm. My question is: What is the formula to calculate the reflected power from the signal measured? The signal I see on my application is not what it should look like.
