[Test-Equipment] HP question

[bonddaleena at aol.com]

Hi, on that 'evil, ePay, er, eBay', there is listing for a HP-11710B 
Down Converter. If my fading memory is correct, is this the piece of 
gear that will allow my HP 8640B to cover lower frequencies as well?

thanks!

ron
N4UE

P.S. Still looking for someone to help me repair my Biddle Model 110-1 
TDR.....................