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Measurements and Results

R&S

FSW

165User Manual 1173.9411.02 ─ 43

Figure 7-27: Gap channel definition for lower gap

If the gap channels are not symmetrical, you must configure up to four channels indi-

vidually. The formula indicated above applies for the lower channels. For the upper

channels, the spacing is defined as:

Spacing = [right sub block CF]- [CF of gap channel] - ([RF bandwidth of right sub

block] /2)

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

left of the gap. The ACLR power of the upper gap channels refers to the TX channel to

the right of the gap. A separate relative limit value can be defined for the ACLR power.

Adjacent channels

Adjacent channels are defined as in common ACLR measurements using bandwidths

and spacings, relative to the uppermost or lowermost transmit channels in the sub

blocks (see also Figure 7-24):

●

The spacing of the lower adjacent channels refers to the CF of the first Tx channel

in the first sub block.

Channel Power and Adjacent-Channel Power (ACLR) Measurement

R&S FSW Series User Manual

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