User Manual

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The Spectrum Application (RF Measurements)

R&S

FPL1000

285User Manual 1178.3370.02 ─ 03

Channel Bandwidth

Defines the channel bandwidth for the transmission channel in single-carrier measure-

ments. This bandwidth is used to optimize the test parameters (for details see " Adjust

Settings " on page 285). The default setting is 14 kHz.

For measurements according to a specific transmission standard, define the bandwidth

specified by the standard for the transmission channel.

For multicarrier measurements, this setting is irrelevant.

Remote command:

[SENSe:]POWer:ACHannel:BANDwidth[:CHANnel<ch>] on page 545

Adjust Settings

Optimizes the instrument settings for the measurement of the occupied bandwidth

according to the specified channel bandwidth.

This function is only useful for single carrier measurements.

All instrument settings relevant for power measurement within a specific frequency

range are optimized:

●

Frequency span: 3 × channel bandwidth

●

RBW ≤ 1/40 of channel bandwidth

●

VBW ≥ 3 × RBW

●

Detector: RMS

The reference level is not affected by "Adjust Settings" . For an optimum dynamic

range,select the reference level such that the signal maximum is close to the reference

level.

(See " Setting the Reference Level Automatically ( Auto Level )" on page 386).

The adjustment is carried out only once. If necessary, the instrument settings can be

changed later.

Remote command:

[SENSe:]POWer:ACHannel:PRESet on page 541

Search Limits ( Left / Right )

If activated, limit lines are defined and displayed for the search. Only results within the

limited search range are considered.

For details on limit lines for searches, see "Peak search limits" on page 453.

Remote command:

CALCulate<n>:MARKer<m>:X:SLIMits[:STATe] on page 717

CALCulate<n>:MARKer<m>:X:SLIMits:LEFT on page 717

CALCulate<n>:MARKer<m>:X:SLIMits:RIGHt on page 717

Deactivating All Search Limits

Deactivates the search range limits.

Remote command:

CALCulate<n>:MARKer<m>:X:SLIMits[:STATe] on page 717

CALCulate<n>:THReshold:STATe on page 719

Measurements and Results