Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
139
User Manual 1321.1011.02 ─ 11
Measurement items
Descriptions
Freq [Hz]
Frequency of the peak level that has been mea-
sured in each frequency range
Power Abs
Absolute peak power in the corresponding fre-
quency range.
Power Rel
Relative peak power in relation to the channel
power of the reference channel.
∆
Limit
Minimum distance from the limit line to the trace
in the corresponding frequency range. Negative
values or a zero indicate a passed SEM limit
check, positive values indicate a violation of the
limit check.
6.1.5.4
Configuring and Triggering the Sweep
For more information on setting the sweep, see
Chapter 6.2.5.1, "Setting the Sweep
on page 184 in frequency domain.
Equipped with option R&S Spectrum Rider-K57 (order number: 1321.1586.02) , you
can now peform gated trigger measurement. For more information on the trigger func-
tionality, see
Chapter 6.2.5.3, "Working with Trigger Functionality"
on page 186 in fre-
quency domain.
6.1.5.5
Using a Trigger
For more information on using external trigger to trigger measurements, see
6.1.6
Measuring the Adjacent Channel Leakage Ratio (ACLR)
The Adjacent Channel Leakage Ratio (ACLR) measurement is a method to measure
the power over more than one transmission channel and also evaluate the power of
the adjacent (or alternate) channels of the transmission channel. The ACLR performs
measurements according to a specific channel configuration, e.g. a particular radio-
communications standard.
1. Press [MEAS] key.
2. Select "Meas Mode" softkey.
The R&S Spectrum Rider opens a submenu to select the measurement mode.
3. Select the "ACLR"menu item.
The R&S Spectrum Rider starts to measure the adjacent channel leakage ratio.
In principle, the ACLR measurement works like the channel power measurement in
that it determines the spectrum within the channel using a resolution bandwidth that is
small compared to the channel bandwidth. In addition to the channel bandwidth, the
Performing Spectrum Measurements
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