Found that Someone Before Me (SBE), had changed the output resistor in my HP Function Generator. The output is 600 Ohms to be consistent with other test equipment inputs. This resistor is 620 Ohms and much larger than it needs to be. I'm guessing 2 Watts, and HP calls for 1/2 Watt. Mouser just sent me a 600 Ohm 1/2 Watt 1%'er. So I am back in business.