Rohde & Schwarz NRP2 - Page 111

Instrument Functions
NRP2
108User Manual 1173.9140.02 ─ 07
Table 4-5: Formulas for sum and difference of power
Function
Unit
W dBm dbμV
Sum (A+B)
BA
PP 







mW1
lg10
BA
PP
 









Vμ1
lg20
ZPP
BA
Diff (A-B)
BA
PP 







mW1
lg10
BA
PP
 









Vμ1
lg20
ZPP
BA
Table 4-6: Formulas for relative measurement
Function
Unit
1 dB Δ%
Single
R
P
P








R
P
P
lg10








1100
R
P
P
Sum
Diff
R
BA
P
PP 







mW1
lg10
BA
PP










1100
R
BA
P
PP
Ratio
R
Y
X
B
A
P
P
P
P
















R
Y
X
B
A
P
P
P
P
















lg10























1100
R
Y
X
B
A
P
P
P
P
Table 4-7: Legend for formula tables
Variable Meaning
P
P
A
P
B
P
R
(P
X
/ P
Y
)
R
Z
Power
Power in channel A (incident power)
Power in channel B (reflected power)
Reference (power)
Reference (power ratio)
Characteristic impedance, i.e. 50Ω
Unit
The "Unit" drop-down list is used to set the result unit. Units that are provided for the
selected measurement function:
"W"
Single, Diff, Sum
"dBm | dBμV"
Single, Diff, Sum
"Δ% | dB | 1"
Ratio
Configuring measurements
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