Instrument Functions
R&S
®
FSVA/FSV
321Operating Manual 1176.7510.02 ─ 09
In the "Channel Setup" dialog box you define the channel settings for all channels,
independent of the defined number of used TX or adjacent channels.
● Defining Channel Bandwidths...............................................................................321
● Defining Channel Spacings...................................................................................321
● Configuring a Limit Check.....................................................................................322
Defining Channel Bandwidths
The transmission-channel bandwidth is normally defined by the transmission standard.
The correct bandwidth is set automatically for the selected standard (see "Optimized
Settings for CP/ACLR Test Parameters" on page 336).
For measurements that require channel bandwidths which deviate from those defined
in the selected standard, use the IBW method (see Fast ACLR (On/Off) softkey). With
the IBW method, the channel bandwidth borders are right and left of the channel center
frequency. Thus, you can visually check whether the entire power of the signal under
test is within the selected channel bandwidth.
► In the "Channel Setup" dialog box, select the "Bandwidth" tab to define the channel
bandwidths.
The value entered for any TX channel is automatically also defined for all subse-
quent TX channels. Thus, only one value needs to be entered if all TX channels
have the same bandwidth.
The value entered for any ADJ or ALT channel is automatically also defined for all
alternate (ALT) channels. Thus, only one value needs to be entered if all adjacent
channels have the same bandwidth.
Defining Channel Spacings
Channel spacings are normally defined by the selected standard but can be changed.
If the spacings are not equal, the channel distribution according to the center frequency
is as follows:
Odd number of TX channels The middle TX channel is centered to center frequency.
Even number of TX channels The two TX channels in the middle are used to calculate the fre-
quency between those two channels. This frequency is aligned to
the center frequency.
► In the "Channel Setup" dialog box, select the "Spacing" tab to define the channel
spacings.
The value entered for any TX channel is automatically also defined for all subse-
quent TX channels. Thus, only one value needs to be entered 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 one value needs to be entered for equal channel spacing.
Measurement Functions
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