R&S FSV3000 Series - Page 163

Measurements and Results
R&S
®
FSVA3000/ R&S
®
FSV3000
163User Manual 1178.8520.02 ─ 01
Setting a fixed reference for Channel Power measurements ( Set CP Reference )
If only one Tx channel and no adjacent channels are defined, the currently measured
channel power can be used as a fixed reference value for subsequent channel power
measurements.
When you select this button, the channel power currently measured on the Tx channel
is stored as a fixed reference power. In the following channel power measurements,
the power is indicated relative to the fixed reference power. The reference value is dis-
played in the "Reference" field (in relative ACLR mode); the default value is 0 dBm.
Note: In adjacent-channel power measurement, the power is always referenced to a
transmission channel (see " Reference Channel " on page 161), thus, this function is
not available.
Remote command:
[SENSe:]POWer:ACHannel:REFerence:AUTO ONCE on page 759
Optimized Settings ( Adjust Settings )
All instrument settings for the selected channel setup (channel bandwidth, channel
spacing) can be optimized automatically.
The adjustment is carried out only once. If necessary, the instrument settings can be
changed later.
The following settings are optimized by "Adjust Settings" :
●
"Frequency Span" on page 151
●
"Resolution Bandwidth (RBW)" on page 151
●
"Video Bandwidth (VBW)" on page 152
●
"Detector" on page 152
●
"Trace Averaging" on page 153
Remote command:
[SENSe:]POWer:ACHannel:PRESet on page 751
Sweep Time
With the RMS detector, a longer "Sweep Time" increases the stability of the measure-
ment results. For recommendations on setting this parameter, see " Sweep Time "
on page 150.
The "Sweep Time" can be set via the softkey in the "Ch Power" menu and is identical
to the general setting in the "Sweep" configuration dialog box.
Remote command:
[SENSe:]SWEep:TIME on page 897
7.3.4.2 Channel Setup
The "Channel Settings" tab in the "ACLR Setup" dialog box provides all the channel
settings to configure the channel power or ACLR measurement. You can define the
channel settings for all channels, independent of the defined number of used Tx or
adjacent channels (see " Number of channels: Tx , Adj " on page 160).
For details on setting up channels, see Chapter 7.3.6.2, "How to Set Up the Channels",
on page 182.
Channel Power and Adjacent-Channel Power (ACLR) Measurement