Rohde & Schwarz FSV3000, Руководство пользователя

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Measurements and results
R&S
®
FSVA3000/ R&S
®
FSV3000
222 User Manual 1178.8520.02 ─ 08
The remote commands required to perform these tasks are described in Chap-
ter 12.5.5, "Measuring the occupied bandwidth" , on page 925.
% Power Bandwidth .................................................................................................... 222
Channel Bandwidth ..................................................................................................... 222
Adjust Settings ............................................................................................................ 222
Search Limits (Left / Right) ..........................................................................................222
Deactivating All Search Limits .....................................................................................223
% Power Bandwidth
Defines the percentage of total power in the displayed frequency range which defines
the occupied bandwidth. Values from 10
% to 99.9 % are allowed.
Remote command:
[SENSe:]POWer:BANDwidth
on page 926
Channel Bandwidth
Defines the channel bandwidth for the transmission channel in single-carrier measure-
ments. This bandwidth is used to optimize the test parameters (for details see
"Adjust
Settings" on page 222). The default setting is 14 kHz.
For measurements according to a specific transmission standard, define the bandwidth
specified by the standard for the transmission channel.
For multicarrier measurements, this setting is irrelevant.
Remote command:
[SENSe:]POWer:ACHannel:BANDwidth[:CHANnel<ch>]
on page 869
Adjust Settings
Optimizes the instrument settings for the measurement of the occupied bandwidth
according to the specified channel bandwidth.
This function is only useful for single carrier measurements.
All instrument settings relevant for power measurement within a specific frequency
range are optimized:
●
Frequency span: 3 × channel bandwidth
●
RBW ≤ 1/40 of channel bandwidth
●
VBW ≥ 3 × RBW
●
Detector: RMS
The reference level is not affected by "Adjust Settings". For an optimum dynamic
range,select the reference level such that the signal maximum is close to the reference
level.
(See "Setting the Reference Level Automatically (Auto Level)" on page 458).
The adjustment is carried out only once. If necessary, the instrument settings can be
changed later.
Remote command:
[SENSe:]POWer:ACHannel:PRESet
on page 865
Search Limits (Left / Right)
If activated, limit lines are defined and displayed for the search. Only results within the
limited search range are considered.
Occupied bandwidth measurement (OBW)