HP 8153A - Page 156

When an immediate trigger is used for averaging times of
more than 1 second, the first measurement is available at
the end of the averaging time. The second measurement
is available again at the end of the averaging time (once
another trigger has been made), and so on. This is shown
in Figure 8-3, TAverage is 5s. First measurement is available
at xi, which is the average for readings in the period Ti.
The second measurement is available at X 2 , which is the
average for the readings in the period T 2 . Again in this
case, the value is calculated by the formula
'^sample \ r, if '^sample \
1- — - 1 + b ample \ — - I
-lavg / \ -^avg /
Where
X|,ew is the new result,
Xoid is the previous result.
Sample is the value read by the hardware,
Tavg is the averaging time (as set by the user), and
Tsampie is the time taken, by the hardware, to make a
reading.
= Tp - T
Figure 8-3.
Measurements with TAverage > 1 second, immediate triggering.
Related Commands READ:SCAL:POW:DC?, SEMS:POW:REF:STAT,
SENS:P0W:REF;STAX? SENS:POW:UNIT, SENS:P0W:UNIT?,
INIT:C0KT,INIT:C0NT?
Example OUTPUT 722; "FETC:P0W?"
ENTER 722 ;A$
8-6 Remote Operation • Commands