Rohde & Schwarz NRP2 - Page 110

Instrument Functions
NRP2
107User Manual 1173.9140.02 ─ 07
Fig. 4-40: Setting the Unit
Only the units which are compatible with the selected measurement function are provi-
ded for selection. I.e. absolute power values are displayed in W, dBm or dBμV , and
relative values in 1, dB or Δ%, respectively.
The following tables show how the R&S NRP2 calculates the measurement results for
the different units either in absolute notation or relative to a reference value, see chap-
ter 4.4.4, "Relative measurement", on page
110 (for legend see table 4-7
) :
Table 4-3: Formulas for absolute single channel power measurement
Function
Unit
W dBm dBμV
Single
P








mW1
lg10
P










V1
lg20
ZP
Table 4-4: Formulas for power ratio measurement
Function
Unit
W dBm dBμV
Ratio (A,B)








B
A
P
P
lg10








1100
B
A
P
P
B
A
P
P
SWR (A,B) – –
A
B
A
B
P
P
P
P


1
1
RCoeff (A,B) – –
A
B
P
P
RLoss (A,B)








B
A
P
P
lg10
– –
Configuring measurements
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