R&S FSL 3GPP Base Station Measurements (Option K72)
1300.2519.12 2.115 E-11
Setup for Base Station Tests
This section describes how to set up the R&S FSL for 3GPP FDD base station tests. As a prerequisite
for starting the test, the instrument must be correctly set up and connected to the AC power supply as
described in the Quick Start Guide, chapter 1. Furthermore, the R&S FSL must be equipped with the
3GPP Base Station Measurements option (R&S FSL–K72). Installation instructions are provided in the
Quick Start Guide, chapter 3.:
Standard test setup
Base
Transmission
Station
E
XT TRIGGER
Frame
Trigger
R
F
I
NPUT
TX signal
ext. reference signal
EXT
REF
R&S FSL
Fig. 2-81 Base Transmission station test setup
Connect the antenna output (or TX output) of the base transmission station to RF input of the
R&S FSL via a power attenuator of suitable attenuation.
The following values are recommended for the external attenuator to ensure that the RF input of the
R&S FSL is protected and the sensitivity of the R&S FSL is not reduced too much.
Max. power Recommended ext. attenuation
55 to 60 dBm
35 to 40 dB
50 to 55 dBm
30 to 35 dB
45 to 50 dBm
25 to 30 dB
40 to 45 dBm
20 to 25 dB
35 to 40 dBm
15 to 20 dB
30 to 35 dBm
10 to 15 dB
25 to 30 dBm
5 to 10 dB
20 to 25 dBm
0 to 5 dB
<20 dBm 0 dB
For signal measurements at the output of two–port networks, connect the reference frequency of
the signal source to the reference input of the R&S FSL (EXT REF).
To ensure that the error limits specified by the 3GPP standard are met, the R&S FSL should use an
external reference frequency for frequency measurements on base stations. For instance, a
rubidium frequency standard may be used as a reference source.
If the base station is provided with a trigger output, connect this output to the trigger input of the
R&S FSL (EXT TRIGGER/GATE IN).
Basic settings
1. Enter the external attenuation).
2. Enter the reference level.
3. Enter the center frequency.
4. Set the trigger.
5. Select the standard and measurement.
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