HP E4418B Programming Manual page 42

Power Meter Remote Operation
Making Measurements
Example 6 - Making a Ratio Measurement
The following command can only be carried out on the HP E4419B. It
queries the upper window to make a ratio measurement of channel A/B .
The expected power and resolution parameters are defaulted, leaving
them at their current settings.
Note
Command
MEAS1[:POW][AC]?
MEAS2[:POW][AC]?
MEAS1:POW:AC:RAT
1-18
specifies window
MEAS1:POW:AC:RAT? DEF,DEF,(@1),(@2)
HP E4419B only
The operation of the MEASure? command when the source list
parameter is defaulted depends on the current setup of the window
concerned (for example, A, B, A/B, A-B etc.) and on the particular
command used (for example, MEAS[:POW][:AC]? and
MEAS:POW:AC:RAT? etc).
This means that when the source list parameter is defaulted, there
are a number of possibilities.
Current Window Setup
Upper Window: A
Lower Window: A
Upper Window: A/B
specifies the relationship of the
channels in the ratio
Channel A / B
Measurement
B
Any Other
B
Any Other
B/A
Any Other
HP E4418B/E4419B Programming Guide
A
B
A
A
B
B
A/B
B/A
A/B