[Test-Equipment] HP 8640B fixed

[Marco Bruno]

At 01.22 08/10/2005, you wrote:

> > Surprising to me, the display does go to 1024 MHz and the doubler is
> > verified to not be there. When I find some proper equipment I
> > will check to
> > see if it is actually generating at 1 GHz.
>
>They all do that.  It's easy for them to double the display reading, and it
>tells you what the frequency would be if you were using a doubler.
>
>-- jm

A general rule for the 8640B: if the band knob has a black segment between
the "512" and "1024" markings, it's an ordinary 8640B requiring an external
doubler to reach 1 GHz. If it has no black segments on the band dial it should
be opt. 002 - incorporating the doubler. That's true if nobody has 
changed the knob :-)

73 - Marco IK1ODO