R&S FSW Series - Page 184

Measurements and Results
R&S
®
FSW
184User Manual 1173.9411.02 ─ 43
Sub Block Definition
Sub blocks are groups of transmit channels in an MSR signal. Up to 8 sub blocks can
be defined. They are defined as an RF bandwidth around a center frequency with a
specific number of transmit channels (max. 18).
Sub blocks are named A,B,C,D,E,F,G,H and are indicated by a slim blue bar along the
frequency axis.
Sub Block / Center Freq ← Sub Block Definition
Defines the center of an MSR sub block. Note that the position of the sub block also
affects the position of the adjacent gap channels.
Remote command:
[SENSe:]POWer:ACHannel:SBLock<sb>:FREQuency:CENTer on page 861
RF Bandwidth ← Sub Block Definition
Defines the bandwidth of the individual MSR sub block. Note that sub block ranges
also affect the position of the adjacent gap channels.
Remote command:
[SENSe:]POWer:ACHannel:SBLock<sb>:RFBWidth on page 862
Number of Tx Channels (Tx Count) ← Sub Block Definition
Defines the number of transmit channels the specific sub block contains. The maxi-
mum is 18 Tx channels.
Remote command:
[SENSe:]POWer:ACHannel:SBLock<sb>:TXCHannel:COUNt on page 863
Tx Channel Definition
As opposed to common ACLR channel definitions, the Tx channels are defined at
absolute frequencies, rather than by a spacing relative to the (common) center fre-
quency. Each transmit channel can be assigned a different technology, used to prede-
fine the required bandwidth.
The Tx channel settings for the individual sub blocks are configured in individual sub-
tabs of the "Tx Channel Settings" tab.
For details on configuring MSR Tx channels, see Chapter 7.2.6.3, "How to Configure
an MSR ACLR Measurement", on page 196.
Remote command:
[SENSe:]POWer:ACHannel:SBLock<sb>:NAME[:CHANnel<ch>] on page 887
Tx Center Frequency ← Tx Channel Definition
Defines the (absolute) center frequency of an MSR Tx channel. Each Tx channel is
defined independently of the others; automatic spacing as in common ACLR measure-
ments is not performed.
Note that the position of the adjacent channels is also affected by:
●
The position of the first Tx channel in the first sub block
●
The position of last Tx channel in the last sub block
Remote command:
[SENSe:]POWer:ACHannel:SBLock<sb>:CENTer[:CHANnel<ch>] on page 861
Channel Power and Adjacent-Channel Power (ACLR) Measurement