Measurements and Results
R&S
®
FSVA3000/ R&S
®
FSV3000
179User Manual 1178.8520.02 ─ 01
└ Gap Channel Bandwidths ............................................................................ 180
└ Weighting Filters .......................................................................................... 180
└ Limit Checking ............................................................................................. 180
Activate Gaps
If enabled, the gap channels are displayed and channel power results are calculated
and displayed in the Result Summary.
Remote command:
[SENSe:]POWer:ACHannel:AGCHannels on page 777
Minimum gap size to show Gap 1 / Minimum gap size to show Gap 2
If the gap between the sub blocks does not exceed the specified bandwidth, the gap
channels are not displayed in the diagram. The gap channel results are not calculated
in the result summary.
Remote command:
[SENSe:]POWer:ACHannel:GAP<gap>:MSIZe on page 779
Gap Channel Definition
Between two sub blocks in an MSR signal, two gaps are defined: a lower gap and an
upper gap. Each gap in turn contains two channels, the gap channels. The channels in
the upper gap are identical to those in the lower gap, but inverted. Thus, in the
R&S FSV/A MSR ACLR measurement, only two gap channels are configured.
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)
Gap Channel Spacing ← Gap Channel Definition
Gap channel spacings are normally predefined by the MSR standard but can be
changed.
Gap channels are defined using bandwidths and spacings, relative to the outer edges
of the surrounding sub blocks. Since the upper and lower gap channels are identical,
only two channels must be configured. The required spacing can be determined
according to the following formula (indicated for lower channels):
Spacing = [CF of the gap channel] - [left sub block center] + ([RF bandwidth of left sub
block] /2)
(See also Figure 7-25 and Figure 7-26.)
For details, see Chapter 7.3.6.3, "How to Configure an MSR ACLR Measurement",
on page 183.
Remote command:
[SENSe:]POWer:ACHannel:SPACing:GAP<gap> on page 779
Channel Power and Adjacent-Channel Power (ACLR) Measurement
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