Regarding the improved integrator A9 in the 5065A
Rubidium FStandard. (Series 2632)
I have copied some of the improvements (?)that HP made to the 5065. The A7
AC-Amplifierand the A9 Integrator. Regarding the A9 Integrator:
I noticed that there is nothing that prevents
the [-EFC] signal from going
Ulf,
The new A9 was only installed in units that had the 10811 installed so HP
was not concerned with it working with the 105 oscillator.
In the 10811 interface the EFC from A9 goes thru a 316K resistor to a
147K (nominal) resistor to ground. This forms a voltage divider the feed
the 10811 EFC pi
Hi
The 70 or 100K resistors are in there because they are a dirt cheap way to
isolate
the RF on the diode from the DC control signal. If by some strange error, the
diode
actually *has* leakage near its ratings, they could be an issue. Real world
diodes
don’t ever seem to have measurable leakage
