The Spectrum Application (RF Measurements)
R&S
®
FPL1000
271
User Manual 1178.3370.02 ─ 03
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The number of transmission (Tx) and adjacent channels
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The bandwidth of each channel
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For multicarrier ACLR measurements: which Tx channel is used as a reference
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The spacing between the individual channels
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Optionally: the names of the channels displayed in the diagram and result table
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Optionally: the influence of individual channels on the total measurement result
( "Weighting Filter" )
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Optionally: limits for a limit check on the measured power levels
Changes to an existing standard can be stored as a user-defined standard, see
to Manage User-Defined Configurations"
► To configure the channels in the "Ch Power" dialog box, select "Ch Power" > "CP /
ACLR Config" > "Channel Settings" tab.
In the "Channel Setup" dialog box, you can define the channel settings for all channels,
independent of the defined number of
used
Tx or adjacent channels.
To define channel spacings
Channel spacings are normally defined by the selected standard but can be changed.
► In the "Channel Settings" tab of the "ACLR Setup" dialog box, select the "Spacing"
subtab.
The value entered for any Tx channel is automatically also defined for all subse-
quent Tx channels. Thus, only enter one value if all Tx channels have the same
spacing.
If the channel spacing for the adjacent or an alternate channel is changed, all
higher alternate channel spacings are multiplied by the same factor (new spacing
value/old spacing value). The lower adjacent-channel spacings remain unchanged.
Only enter one value for equal channel spacing.
Example: Defining channel spacing
In the default setting, the adjacent channels have the following spacing: 20 kHz
("ADJ"), 40 kHz ("ALT1"), 60 kHz ("ALT2"), 80 kHz ("ALT3"), 100 kHz ("ALT4"), …
Set the spacing of the first adjacent channel ("ADJ") to
40
kHz
. For all other adjacent
channels, the spacing is multiplied by factor 2: 80 kHz ("ALT1"), 120 kHz ("ALT2"), 160
kHz ("ALT3"), …
Starting from the default setting, set the spacing of the fifth adjacent channel ("ALT4")
to
150
kHz
. For all higher adjacent channels, the spacing is multiplied by factor 1.5:
180 kHz ("ALT5"), 210 kHz ("ALT6"), 240 kHz ("ALT7"), …
Measurements and Results
