Instrument Functions
R&S
®
FSVA/FSV
327Operating Manual 1176.7510.02 ─ 09
Bandwidth ← Channel Setup ← CP/ACLR Settings ← Ch Power ACLR
Define the channel bandwidths for the transmission channels and the adjacent chan-
nels. "TX" is only available for the multi-carrier ACLR measurement. When you change
the bandwidth for one channel, the value is automatically also defined for all subse-
quent channels of the same type.
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).
●
Measurements in zero span (see Fast ACLR (On/Off) softkey) are performed in the
zero span mode. The channel limits are indicated by vertical lines. For measure-
ments requiring channel bandwidths deviating from those defined in the selected
standard the IBW method is to be used.
●
With the IBW method (see Fast ACLR (On/Off) softkey), the channel bandwidth
limits are marked by two vertical lines right and left of the channel center fre-
quency. Thus you can visually check whether the entire power of the signal under
test is within the selected channel bandwidth.
If measuring according to the IBW method ("Fast ACLR Off"), the bandwidths of
the different adjacent channels are to be entered numerically. Since all adjacent
channels often have the same bandwidth, the other alternate channels are set to
the bandwidth of the adjacent channel when it is changed. Thus, only one value
needs to be entered in case of equal adjacent channel bandwidths.
For details on available channel filters see Chapter 3.2.6.3, "Selecting the Appropriate
Filter Type", on page 243.
Remote command:
[SENSe:]POWer:ACHannel:BANDwidth|BWIDth[:CHANnel<channel>]
on page 842
[SENSe:]POWer:ACHannel:BANDwidth|BWIDth:ACHannel on page 842
[SENSe:]POWer:ACHannel:BANDwidth|BWIDth:ALTernate<channel>
on page 843
ACLR Reference ← Bandwidth ← Channel Setup ← CP/ACLR Settings ← Ch
Power ACLR
Select the transmission channel to which the relative adjacent-channel power values
should be referenced.
TX Channel 1 Transmission channel 1 is used.
Min Power TX Channel The transmission channel with the lowest power is used as a refer-
ence channel.
Max Power TX Channel The transmission channel with the highest power is used as a refer-
ence 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 that for the upper adjacent channels.
Remote command:
[SENSe:]POWer:ACHannel:REFerence:TXCHannel:MANual on page 848
[SENSe:]POWer:ACHannel:REFerence:TXCHannel:AUTO on page 848
Measurement Functions
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