What are the important considerations in setting signal source levels for my DUT?
It is very important to correctly adjust the signal level to the DUT, because every dB of discrepancy from the expected level may cause a 2 dB of error in third order distortion measurements. When leveling an amplifier for example, the target reading at the measuring device should account for any cable or system losses, or attenuator pads from the output of your device. In addition, if dBmV units are being used to specify the target levels, an adjustment must be made if the output of your device is 75 ohms and the input of the measuring device is 50 ohms.
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- What are the important considerations in setting signal source levels for my DUT?
