User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
266User Manual 1178.3370.02 ─ 03
Power Mode
The measured power values can be displayed directly for each trace ( "Clear/ Write" ),
or only the maximum values over a series of measurements can be displayed ( "Max
Hold" ). In the latter case, the power values are calculated from the current trace and
compared with the previous power value using a maximum algorithm. The higher value
is retained. If "Max Hold" mode is activated, "Pwr Max" is indicated in the table header.
Note that the trace mode remains unaffected by this setting.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:POWer:MODE on page 537
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 265), thus, this function is
not available.
Remote command:
[SENSe:]POWer:ACHannel:REFerence:AUTO ONCE on page 549
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 259
●
"Resolution Bandwidth (RBW)" on page 260
●
"Video Bandwidth (VBW)" on page 260
●
"Detector" on page 261
●
"Trace Averaging" on page 261
Remote command:
[SENSe:]POWer:ACHannel:PRESet on page 541
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 258.
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 656
Measurements and Results