R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Instrument Functions
WEIGHTING
FILTER
Analyzer Mode
The softkey WEIGHTING FILTER opens a dialog to specify the filter configuration
parameter for all TX Channels and Adjacent Channels.
Some of the digital standards specify weighting filter to be taken into account. In that
case the required filter is implicitely activated by the selection of the ACP standard.
The weighting filter parameters can be manually controlled for NORMAL ACP, if no
predefined standard is selected (standard NONE or USER). The softkey is not available
for FAST ACP.
The dialog box contains the following paramaters:
• TX CH: Toggles the weighting filter state. You can set a weighting filter for up to
18 TX channels and 11 alternate channels. If active, the channel is check marked.
• Alpha: Specifies the roll-off factor of the weighting filter. The default value is 0.22.
Possible range is from 0 to 1.
Most of the standards require identical settings for all channels. It is sufficient to configure
the first table entry (TX1) in that case. All the subsequent channels are
adjusted to the same value.
The filter settings can be set separately by overwriting the table from top to bottom
(TX1 -> TX2 -> TX3 -> (...) -> TX18 -> ADJ -> ALT1 -> (...) -> ALT12
To adjust the weigthing filter settings of a predefined standard:
• Select the predefine standard (CP/ACP STANDARD)
• Use SAVE AS USER STD to create an own user standard
• Select this user standard (CP/ACP STANDARD USER) with the specified name
• Change the weigthing filter configuration
• Save the user standard again with SAVE AS USER STD
Note that in version 4.4x, it is possible to specifiy separate filter configuration for all
the TX channels and all the ADJ channels. As of firmware version 4.5x, the separate
weigthing filter configurations are supported for the Multicarrier ACP measurement
as well.
Remote command: see SENSe:POWer Subsystem
4.102 Operating Manual 1313.9681.12 - 01