Measurements and Results
R&S
®
FSVA3000/ R&S
®
FSV3000
155
User Manual 1178.8520.02 ─ 01
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.
Gap channels and CACLR
If two or more sub blocks are defined, the power in the gaps between the sub blocks
must also be measured. 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 symmetrical, only two gap 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)
Figure 7-26: Gap channel definition for lower gap
According to the MSR standard, the
Cumulative Adjacent Channel Leakage Ratio
(CACLR) power
must be determined for the gap channels. The CACLR power is mea-
sured in the two gap channels for the upper and lower gap. The power in the gap chan-
nels is then set in relation to the power of the two closest transmission channels to
either side of the gap. The CACLR power for the gap channels is indicated in the
Result Summary.
In addition, the ACLR power for the individual gap channels is indicated in the Result
Summary. The ACLR power of the lower gap channels refers to the TX channel to the
Channel Power and Adjacent-Channel Power (ACLR) Measurement
