I just acquired a used GW Instek MFG-2130 Function Generator. All went well during initial setup until I tried to enter a specific amplitude for a desired sine wave output: When I key in an amplitude of 100mV RMS, I measure at the output 202mV RMS (measured with 3 different meters). When I press the various function keys at the bottom (e.g. "RMS, PP", etc), the amplitude value changes on the display (e.g. 100mV RMS changes to 282mV PP), but the output voltage remains the same. "200mV RMS" on display gives me 410mV RMS at the output.
Am I doing something wrong here or is there a problem with the function generator?
Thanks for any assistance