Keysight 34401A, Service Manual

Page: 50 / 165

To Make dcv:dcv Ratio Measurements
To calculate a ratio, the multimeter measures a dc reference voltage
applied to the
Sense
terminals and the voltage applied to the
Input
terminals.
•
At the
Sense
terminals, the reference voltage measurement function
is always dc voltage and has a maximum measurable input of
±
12 Vdc. Autoranging is automatically selected for reference voltage
measurements on the
Sense
terminals.
•
The
Input LO
and
Sense LO
terminals must have a common reference
and cannot have a voltage difference greater than
±
2 volts.
•
The specified measurement range applies only to the signal connected
to the
Input
terminals. The signal on the
Input
terminals can be any
dc voltage up to 1000 volts.
Ratio
=
dc signal
voltage
dc reference voltage
Ratio
annunciator is on when
ratio measurements are enabled.
To enable ratio measurements, use the MEAS menu.
2
Chapter 2 Quick Start
To Make dcv:dcv Ratio Measurements
43