Instrument Functions
NRP2
99
User Manual 1173.9140.02 ─ 07
The first step is to select the measurement function, i.e. the mode of combination for
multi-channel measurements. Possible functions are the power ratio, the sum, or the
difference of two channels, an impedance matching measurement function derived
from the power ratio or the power in a single measurement channel. All or any of the
connected sensors can be selected. A primary channel, and possibly a secondary
channel, must be selected for each measurement window.
The simplest case is a measurement with just one sensor. To configure this measure-
ment, first select this sensor in the "Prim. Channel" list. Then select "Single (x)" as
function.
To make two-channel measurement, a "Sec. Channel" must be defined prior to select-
ing the measurement function.
For impedance matching measurement functions ("SWR (x,y)", "RCoeff (x,y)" and
"RLoss (x,y)"), the first letter (x) is always referenced to the channel detecting the "Inci-
dent power" and the second letter (y) to the channel detecting the "Reflected power".
"Prim. Channel" and "Sec. Channel" are replaced by "Incident" and "Reflected" in this
case.
Any of the four channels A, B, C, and D can be assigned primary or secondary chan-
nel.
Fig. 4-29: Function & Unit dialog box
The parameters provided in the middle of the dialog box vary according to the selected
measurement mode.
4.4.3.1
Functions and their use
In the "Function & Unit" dialog box of the "Measurement" menu, select the measure-
ment function, the associated sensor channels, the unit, and additional readings for the
display.
Configuring measurements
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