Agilent 33120A User's Guide

Chapter 3 Features and FunctionsOutput ConfigurationOutput TerminationApplies only to output amplitude and offset voltage. The functiongenerator has a fixed output impedance of 50 ohms on the OUTPUTterminal. You can specify whether you are terminating the output intoa 50 ohm load or an open circuit. Incorrect impedance matching betweenthe function generator and your load will result in an amplitude oroffset which does not match the specified signal level.œ Output termination: 50W or High impedance. The default is 50W.See the table on page 59 for a list of amplitude limits for all functions.œ The output termination setting is stored in volatile memory; 50W isselected when power has been off or after a remote interface reset.œ The amplitude (or dc offset) is automatically adjusted (and no error isgenerated) if you change the output termination. For example, if youset the amplitude to 10 Vpp and then change the termination from50 ohms to “high impedance”, the displayed amplitude will doubleto 20 Vpp. If you change from “high impedance” to 50 ohms, thedisplayed amplitude will drop in half.œ If you specify a 50 ohm termination but are actually terminating intoan open circuit, the displayed output will be twice the value specified.For example, if you set the offset to 100 mVdc (and specify a 50 ohmtermination) but are actually terminating the output into an opencircuit, the actual displayed offset will be 200 mVdc.œ Front-Panel Operation: Choose “50 OHM” or “HIGH Z” from thefront-panel menu.31: OUT TERM (SYS MENU)œ Remote Interface Operation:OUTPut:LOAD {50|INFinity|MINimum|MAXimum}65