HP E4418B - How Measurements Are Calculated

prog.book : chapter1.fm 70 Mon Feb 15 09:24:37 1999
Power Meter Remote Operation
How Measurements are Calculated
1-70 HP E4418B/E4419B Programming Guide
How Measurements are Calculated
Figure 1-9 details how measurements are calculated. It shows the order in
which the various power meter functions are implemented in the
measurement calculation.
Figure 1-9: How Measurements are Calculated
The MEASure commands in this figure can be replaced with the FETCh?
and READ? commands.
Note All references to channel B in the above diagram refer to the
HP E4419B only. The MEAS[1|2]:POW:AC? and
MEAS[1|2]:POW:AC:REL? are the only commands relevant to the
HP E4418B.
HPIB
HP-I
B
Sensor B
Sensor B
Sensor A
Sensor A
SENSe1
:AVER1
:GAIN1
:GAIN3
:GAIN2
Upper Measurement Window
Upper Measurement Window
Upper Measurement Window
“A” | “B”
“A-B” | “B-A”
“A/B” | “B/A”
:MATH
:GAIN
:REL
FORMat
MEAS1:POW:AC?
UNIT1:POW
UNIT1:POW:RAT
MEAS1:POW:AC:DIFF?
MEAS1:POW:AC:REL?
CALCulate1
SENSe2
:AVER1 :GAIN1 :GAIN3:GAIN2
MEAS1:POW:AC:DIFF:REL?
MEAS1:POW:AC:RAT:REL?
MEAS1:POW:AC:RAT?
“A” | “B”
“A-B” | “B-A”
“A/B” | “B/A”
:MATH
:GAIN
:REL
Lower Measurement Window
MEAS2:POW:AC?
UNIT2:POW
UNIT2:POW:RAT
MEAS2:POW:AC:DIFF?
MEAS2:POW:AC:REL?
CALCulate2
MEAS2:POW:AC:DIFF:REL?
MEAS2:POW:AC:RAT:REL?
MEAS2:POW:AC:RAT?
B
A
:LIMit
:LIMit