System Overview
R&S
®
CMW500
75
User Manual 1173.9463.02 ─ 02
Occupied Bandwidth (OBW)
For wideband and OFDM(A) signals, the "Occupied Bandwidth" is the width of a sym-
metric frequency interval around the nominal RF carrier frequency that contains 99 % of
the total integrated power of the transmitted spectrum. The occupied bandwidth shows
whether the signal is confined to the assigned bandwidth of the channel. The following
figure shows the occupied bandwidth for a WCDMA signal. The dark shaded area cor-
responds to the nominal bandwidth of 5 MHz.
Fig. 4-5: Occupied bandwidth (WCDMA/FDD 3.84 MHz)
4.3.7.4
Code Domain Power
A Code Domain Power (CDP) measurement provides the power of the individual code
channels of a CDMA signal. The power in each code channel is averaged over a suitable
time interval (e.g. a slot) and expressed in dB, relative to the power of the total, composite
CDMA signal. Typically, the following measurement tasks can be performed:
●
Compare different physical channel powers within a CDMA signal
●
Compare the observed channel powers with the signaled values (gain factors)
●
Monitor active and inactive channels
Measurements
