R&S FSW Series, Руководство пользователя

Страница: 166 / 1450

Measurements and Results
R&S
®
FSW
166 User Manual 1173.9411.02 ─ 43
●
The spacing of the upper adjacent channels refers to the CF of the last Tx channel
in the last sub block.
The upper and lower adjacent channels can also be defined asymmetrically (see "Sym-
metrical Adjacent Setup" on page 182). This is particularly useful if the lowest Tx
channel and highest Tx channel use different standards and thus require different
bandwidths for adjacent channel power measurement.
Channel display for MSR signals
As in common ACLR measurements, the individual channels are indicated by different
colored bars in the diagram. The height of each bar corresponds to the measured
power of that channel. In addition, the name of the channel is indicated above the bar.
Sub blocks are named A,B,C,D,E,F,G,H and are also indicated by a slim blue bar along
the frequency axis.
Tx channel names correspond to the specified technology (for LTE including the band-
width), followed by a consecutive number. (If the channel is too narrow to display the
channel name, "..."is displayed instead.) The assigned sub block is indicated with the
channel name, e.g. "B: LTE_5M1" for the first Tx channel in sub block B that uses the
LTE 5
MHz bandwidth technology.
Adjacent and alternate channels are displayed as in common ACLR measurements.
Gap channels are indicated using the following syntax:
●
The names of the surrounding sub blocks (e.g. "AB" for the gap between sub
blocks A and B),
●
The channel name ("Gap1" or "Gap2")
●
"L" (for lower) or "U" (for upper)
For example: "ABGap1L" indicates the first lower gap channel between sub blocks A
and B.
Both the lower and upper gap channels are displayed.
For symmetrical configuration, gap channels can be hidden if they do not reach a mini-
mum size.
For asymmetrical configuration, you can define the number of upper or lower gap
channels to be displayed.
In both cases, you can deactivate all gap channels. This enhances the result display,
as fewer lines and bars are displayed. If gap channels are deactivated, the power
results are not calculated and thus are not shown in the Result Summary table.
Furthermore, channel names for all TX, adjacent, and alternate channels are user-
definable (not gap channels).
Channel power results
The Result Summary for MSR signal measurements is similar to the table for common
signals (see
Chapter 7.2.2, "Channel Power Results" , on page 153). However, the Tx
channel results are grouped by sub blocks, and sub block totals are provided instead
Channel Power and Adjacent-Channel Power (ACLR) Measurement