RATIO
224 Chapter 6 Command Reference
Chapter 0:Command Reference
RATIO
The RATIO command instructs the multimeter to measure a DC reference voltage
applied to the
W Sense terminals and a signal voltage applied to the Input
terminals. The multimeter then computes the ratio as:
Syntax RATIO [control]
control
Power-on control = OFF.
Default control = ON.
Remarks • The W Sense LO and the Input LO terminals must have a common reference
and cannot have a voltage difference >0.25V.
• The signal voltage can be measured using the DCV, ACV, or ACDCV
measurement function. (For ACV or ACDCV, any of the three measurement
methods ANA, RNDM, or SYNC may be used.) The multimeter always uses
DCV for the reference voltage measurement. The measurable reference voltage
range is ± 12VDC (autorange only). To specify ratio measurements, you first
select the measurement function (and the measurement method for ACV or
ACDCV) and then enable ratio measurements with the RATIO command (see
example below).
• Query Command. The RATIO? query command returns the present ratio
mode. Refer to "Query Commands" near the front of this chapter for more
information.
• Related Commands: ACDCV, ACV, DCV, SETACV
Example 10 OUTPUT 722;"PRESET NORM" !SUSPEND READINGS,NRDGS=1
20 OUTPUT 722;"ACV" !SELECT AC VOLTAGE MEASUREMENTS
30 OUTPUT 722;"SETACV SYNC" !SYNCHRONOUS ACV MEASUREMENTS
40 OUTPUT 722;"RATIO ON" !ENABLE RATIO MEASUREMENTS
50 OUTPUT 722;"TRIG SGL" !TRIGGER MEASUREMENT
Signal Voltage
Ratio =
DC Reference Voltage
control
Parameter
Numeric
Query
Equiv. Description
OFF 0 Disables ratio measurements
ON 1 Enables ratio measurements using the present
measurement function (DCV, ACV, or ACDCV)
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