Agilent Technologies HP 8642A/B Specifiche Pagina 347

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Description
To configure a Frequency Counter into the system, enter the Name
(Counter), Model Number, and HP-IB Address into the System Configu-
ration Table. The Serial Number and Option Number may also be entered
for the Frequency Counter.
The Counter is not represented on the Source Control Diagram or on the
Connect Diagram.
Connect the Counter to the Aux Monitor port on the HP 11848A. If you
also wish to use an oscilloscope to monitor the Phase Detector Output,
use a tee adapter to connect both the oscilloscope and the counter to the
HP 11848A Aux. Monitor port.
Connect the system's HP-IB to the Frequency Counter and verify that the
system recognizes it in the System Configuration Table.
Considerations when using a Frequency
Counter.
Using a Counter decreases the time the system takes to find the Beatnote,
determine the VCO Tuning Constant, and Zero-Beat the sources.
Counters cannot tolerate sources with large amounts of drift or erratic
noise. If an error message occurs indicating that the system cannot zero
the beatnote or measure the VCO Tuning Constant, remove the counter
from the System Configuration Table.
6-46 Frequency Counters
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