User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
129User Manual 1178.3370.02 ─ 09
In the R&S FPL1000 display, only the first neighboring channel of the carrier (TX)
channel is labeled "Adj" (adjacent) channel; all others are labeled "Alt" (alternate)
channels. In this manual, "Adjacent" refers to both adjacent and alternate channels.
The measured power values for the TX and adjacent channels are also output as a
table in the Result Summary window. Which powers are measured depends on the
number of configured channels.
For each channel, the following values are displayed:
Label Description
Channel Channel name as specified in the "Channel Settings" (see "Channel Names"
on page 141).
Bandwidth Configured channel bandwidth (see "Channel Bandwidth" on page 139)
Offset Offset of the channel to the TX channel (configured channel spacing, see "Channel
Bandwidth" on page 139)
Power
(Lower/Upper)
The measured power values for the TX and lower and upper adjacent channels. The
powers of the transmission channels are output in dBm or dBm/Hz, or in dBc, relative
to the specified reference TX channel.
Retrieving Results via Remote Control
All or specific channel power measurement results can be retrieved using the
CALC:MARK:FUNC:POW:RES? command from a remote computer (see
CALCulate<n>:MARKer<m>:FUNCtion:POWer<sb>:RESult? on page 630).
Alternatively, the results can be output as channel power density, i.e. in reference to
the measurement bandwidth.
Furthermore, the measured power values of the displayed trace can be retrieved as
usual using the TRAC:DATA? commands (see TRACe<n>[:DATA] on page 832). In
this case, the measured power value for each sweep point (by default 1001) is
returned.
For a full list of remote commands for ACLR measurements, see Chapter 11.6.4.7,
"Retrieving and Analyzing Measurement Results", on page 653.
7.2.4.3 Channel Power Basics
Some background knowledge on basic terms and principles used in channel power
measurements is provided here for a better understanding of the required configuration
settings.
● Recommended Common Measurement Parameters............................................129
Recommended Common Measurement Parameters
The following sections provide recommendations on the most important measurement
parameters for channel power measurements.
Measurements and Results