Rohde & Schwarz R&S FSP Series, Operating Manual

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Operating Manual 1164.4556.12 - 06 2.1
R&S FSP Getting Started
2 Getting Started
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2
2.2 Measuring the Spectra of Complex Signals . . . . . . . . . . . . . . . . . . . . . . . . 2.2
2.2.1 Intermodulation Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2
2.2.2 Measurement Example – Measuring the R&S FSP’s intrinsic
intermodulation distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4
2.3 Measuring Signals in the Vicinity of Noise . . . . . . . . . . . . . . . . . . . . . . . . . 2.8
2.3.0.1Measurement example – Measuring the level of the internal
reference generator at low S/N ratios . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.11
2.4 Noise Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.14
2.4.1 Measuring noise power density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.14
2.4.1.1Measurement example – Measuring the intrinsic noise power
density of the R&S FSP at 1 GHz and calculating the R&S FSP’s
noise figure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.14
2.4.2 Measurement of Noise Power within a Transmission Channel . . . . . . . 2.17
2.4.2.1Measurement Example – Measuring the intrinsic noise of the
R&S FSP at 1 GHz in a 1.23 MHz channel bandwidth with the
channel power function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.17
2.4.3 Measuring Phase Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.22
2.4.3.1Measurement Example – Measuring the phase noise of a
signal generator at a carrier offset of 10 kHz . . . . . . . . . . . . . . . . . . . . . . 2.22
2.5 Measurements on Modulated Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.23
2.5.1 Measurements on AM signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.23
2.5.1.1Measurement Example 1 – Displaying the AF of an AM signal in
the time domain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.24
2.5.1.2Measurement Example 2 – Measuring the modulation depth of
an AM carrier in the frequency domain . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.25
2.5.2 Measurements on FM Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.26
2.5.2.1Measurement Example – Displaying the AF of an FM carrier . . . . 2.27
2.5.3 Measuring Channel Power and Adjacent Channel Power . . . . . . . . . . 2.29
2.5.3.1Measurement Example 1 – ACPR measurement on an IS95
CDMA Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.30
2.5.3.2Measurement Example 2 – Measuring the adjacent channel
power of an IS136 TDMA signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.34
2.5.3.3Measurement Example 3 – Measuring the Modulation Spectrum
in Burst Mode with the Gated Sweep Function . . . . . . . . . . . . . . . . . . . . . 2.37
2.5.3.4Measurement Example 4 – Measuring the Transient Spectrum
in Burst Mode with the Fast ACP function . . . . . . . . . . . . . . . . . . . . . . . . . 2.39
2.5.3.5Measurement Example 5 – Measuring adjacent channel power
of a W-CDMA uplink signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.41
2.5.4 Amplitude distribution measurements . . . . . . . . . . . . . . . . . . . . . . . . . . 2.44
2.5.4.1Measurement Example – Measuring the APD and CCDF of
white noise generated by the R&S FSP . . . . . . . . . . . . . . . . . . . . . . . . . . 2.44