
Description
The time required for making a measurement is reduced by using a
voltmeter in place of the voltage measuring capability of the HP 3561A.
Measurements such as the ±DC Peak (Phase Detector) calibration and
verify beatnote, Out of Lock, and Overload can be done more quickly
with the voltmeter.
To configure a Voltmeter into the system, enter the Name (Voltmeter),
Model Number (3478A), and the HP-IB Address into the System Config-
uration Table.
Connect the voltmeter to the HP 11848A Phase Detector Output through
a BNC tee adapter at the To 3561A Input. The HP 3561A and the
HP 3478A are connected in parallel and both have high impedance inputs.
The measurement results will not be affected by having the voltmeter
connected at this point.
Connect the voltmeter to the HP-IB.
Considerations When Using a Voltmeter
Using a common ground on the voltmeter (not isolated) may cause a
ground loop, thereby increasing line spurs.
6-48 Digital Voltmeters
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