aaron_do wrote on May 2^nd, 2008, 9:08pm:

It depends on Signal Generator you use. So you should read manual of SG you use.
In SG, voltage is defined as RMS value. While, you can set Peak, Peak-Peak, RMS as voltage value in FG(Function Generator)
So if SG supports Terminating Voltage Value setting, you set Vrms then get Vrms at matched load.
If SG supports Open Voltage Value setting, you set Vrms then get Vrms/2 at matched load.

If your SG doesn't have such mode and SG is for uWave, it must be Terminating Voltage Value setting.

Usually their voltage units are denoted as dBu and dBuEMF.
For example, Agilent E4438C Signal Generator support following SCPI command to change display amplitude unit.

   "DISP:ANN:AMPL:UNIT {DBM|DBUV|DBUVEMF|V|VEMF}"