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Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
133
User Manual 1321.1011.02 ─ 11
The largest possible span for the channel power measurement is ten times the
channel bandwidth. At larger spans, the result of the channel power measurement
would be increasingly imprecise, because too few points of the trace occur in the
channel to be measured.
4. Select "Auto Span" softkey.
The R&S Spectrum Rider again calculates the span automatically.
6.1.3.6
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.
6.1.3.7
Using a Trigger
For more information on using external trigger to trigger measurements, see
6.1.4
Power Measurements on TDMA Signals
When TDMA (time division multiple access) methods are used, e.g. for GSM, several
users share a channel. Each user is assigned a period of time or timeslot. With the
TDMA power measurement, you can determine the power over one of the timeslots
allocated to the user.
The TDMA power measurement is a measurement in the time domain (span = 0 Hz).
You can start it on an external or video trigger and specify the power measurement
time.
To prevent incorrect power measurements in the time domain, make sure that the
whole signal is within the selected resolution bandwidth. If the resolution bandwidth is
too small, the displayed power will be lower than the actual power.
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 "TDMA Power " menu item.
The R&S Spectrum Rider starts to measure the TDMA power.
Two vertical lines define the measurement range.
Performing Spectrum Measurements
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