R&S FSH Spectrum Analyzer Mode
Performing Spectrum Measurements
Operating Manual 1173.6275.12 - 30 69
- Max Power Tx Channel
The channel with the highest power level is the reference channel.
- Lowest Highest Channel
The outer left-hand transmission channel is the reference channel for the lower
adjacent channels. The outer right-hand transmission channel is the reference
channel for the upper adjacent channels.
3.1.5.6 Setting and Checking the Limits
Limit checks in ACLR measurement mode are independent of limit line handling. You
can define a limit for each of the adjacent channels. Limits for adjacent channels can
be set either in absolute or relative terms.
Defining relative limits
► Press the MEAS key.
► Press the "Channel Settings"
softkey.
► Select the "Channel Limit Relative"
menu item.
The R&S FSH opens a dialog box
to define the relative limits for each
adjacent channel.
► Select the channel you want to
define a limit for.
► Activate the input by pressing the "Select" softkey.
The channel turns green and the check box in the first column is marked.
► Enter the limit value you need.
The R&S FSH automatically activates the check flag, so that the limit is included in
future limit checks.
► To deactivate the limit check for a specific channel, move the cursor to the channel
in question with the rotary knob or the cursor keys and deselect it with the "Select"
softkey.
Defining absolute limits
► Press the "Channel Settings" softkey.
► Select the "Channel Limit Absolute" menu item.
The R&S FSH opens a dialog box to define the absolute limits for each adjacent
channel.
► The procedure of defining absolute limits is analogous to that of defining relative
limits.
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