Rohde & Schwarz R&S UPP, Руководство пользователя

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Instrument Functions
R&S
®
UPP
367 User Manual 1411.1055.32 ─ 10
"BP 1 % ""BS 1 %"
Bandpass filter / bandstop filter with relative width of 1 % (geometri-
cally symmetrical about the center frequency).
(Bandpass filter)
(Bandstop filter)
"BP 3 % ""BS 3 % "
Bandpass filter / bandstop filter with relative width of 3 % (geometri-
cally symmetrical about the center frequency).
(Bandpass filter)
(Bandstop filter)
"BP 1/12 Oct""BS 1/12 Oct"
Bandpass filter / bandstop filter with the relative width of one twelfth
octave (geometrically symmetrical around the center frequency).
(Bandpass filter)
(Bandstop filter)
The relative bandwidth of one twelfth octave is ≈ 6
%.
It is calculated from
 
% 77 . 5 0577 . 0 2 1 2
24 24
  
"BP 1/3
Oct""BS 1/3
Oct" Bandpass filter / bandstop filter with the relative width of one third
octave (geometrically symmetrical around the center frequency).
(Bandpass filter)
(Bandstop filter)
The relative bandwidth of one third octave is ≈ 23
%.
It is calculated from
 
% 15 . 23 2315 . 0 2 1 2
6 6
  
Note: With the third-octave filter, the 0.1 dB bandwidth is reduced
until an attenuation of approx. 3 dB is obtained for the cutoff frequen-
cies. The effective bandwidth is therefore smaller than the precise
bandwidth determined by calculation.
Level Measurements