R&S FSVA3000 Series, User Manual

Page: 170 / 1268

Measurements and Results
R&S
®
FSVA3000/ R&S
®
FSV3000
170 User Manual 1178.8520.02 ─ 01
Remote command:
[SENSe:]POWer:ACHannel:SBCount
on page 768
Reference Channel
The measured power values in the adjacent channels can be displayed relative to the
transmission channel. If more than one Tx channel is defined, define which one is used
as a reference channel.
Tx Channel 1 Transmission channel 1 is used.
Min Power Tx Channel The transmission channel with the lowest power is used as a reference channel.
Max Power Tx Chan-
nel The transmission channel with the highest power is used as a reference channel
(Default).
Lowest & Highest
Channel The outer left-hand transmission channel is the reference channel for the lower
adjacent channels, the outer right-hand transmission channel that for the upper
adjacent channels.
Remote command:
[SENSe:]POWer:ACHannel:REFerence:TXCHannel:MANual
on page 760
[SENSe:]POWer:ACHannel:REFerence:TXCHannel:AUTO
on page 759
Noise Cancellation
The R&S FSV/A can correct the results by removing the inherent noise of the analyzer,
which increases the dynamic range.
In this case, a reference measurement of the inherent noise of the analyzer is carried
out. The measured noise power is then subtracted from the power in the channel that
is being analyzed (first active trace only).
The inherent noise of the instrument depends on the selected center frequency, resolu-
tion bandwidth and level setting. Therefore, the correction function is disabled when-
ever one of these parameters is changed. A disable message is displayed on the
screen. To enable the correction function after changing one of these settings, activate
it again. A new reference measurement is carried out.
Noise cancellation is also available in zero span.
●
RMS
●
Average
●
Sample
●
Positive peak
Remote command:
[SENSe:]POWer:NCORrection
on page 900
Selected Trace
The CP/ACLR measurement can be performed on any active trace.
Remote command:
[SENSe:]POWer:TRACe
on page 751
Absolute and Relative Values (ACLR Mode)
The powers of the adjacent channels are output in dBm or dBm/Hz (absolute values),
or in dBc, relative to the specified reference Tx channel.
Channel Power and Adjacent-Channel Power (ACLR) Measurement