You can download the complete manual from here.

http://www.premium-rx.org/reference.htm

Lots of luck.

Jer - n6jp

"Rick" wrote in message
...
Anyone know of a troubleshooting guide for the HP 8640B?
My display reads all zero's although the generator is putting out a signal
just fine. I'd like to find a step by step guide that would lead me to
the
defective component.

Rick K2XT