R&S NRP2, Руководство пользователя

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Instrument Functions
R&S
®
NRP2
106 User Manual 1173.9157.02 ─ 03
Fig. 4-40: Setting the Unit
Only the units which are compatible with the selected measurement function are provided
for selection. I.e. absolute power values are displayed in W, dBm or dB
μ
V , 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 109 (for legend see
​
table 4-7 ) :
Table 4-3: Formulas for absolute single channel power measurement
Function
Unit
W dBm dB
μ
V
Single
P






mW 1
lg 10
P








V 1
lg 20
Z P
Table 4-4: Formulas for power ratio measurement
Function
Unit
W dBm dB
μ
V
Ratio (A,B)






B
A
P
P
lg 10







1 100
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
lg 10
– –
Configuring measurements