Description

The Rohde & Schwarz FSMR26 Calibrator for Signal Generators & Attenuators combines the functionality of several  instruments  in one and is therefore capable of calibrating all vital parameters of a signal generator.

Plus, the Rohde & Schwarz FSMR26 Calibrator for Signal Generators & Attenuators offers full spectrum analyzer functionality,  e.g. for measuring harmonics or phase noise. The base unit does not provide for image frequency rejection in the range above 3.6 GHz since the YIG filters normally used for this would impair level linearity. The optional YIG preselection filter makes the Rohde & Schwarz FSMR26 Calibrator for Signal Generators & Attenuators a full-featured spectrum analyzer, also in the microwave range. The tracking YIG filter can be switched off for accurate level calibration.

Key facts

• Frequency range from 20 Hz to 26.5 GHz
• Highly accurate level calibrator with wide level measurement range from +30 dBm to –140 dBm
• Modulation analyzer
• Audio analyzer with THD and SINAD measurement functionality
• Power meter for connection of R&S®NRP-Zxx power sensors
• High-performance spectrum analyzer

Excellent linearity and level stability
The linearity of the Rohde & Schwarz FSMR26 Calibrator for Signal Generators & Attenuators is almost exclusively determined by its high-quality A/D converter and the limits of traceability of calibration. Modules and components on which drift (YIG filter) or nonlinear level response (crystal filter) may occur are switched off during level calibration. As a result, the Rohde & Schwarz FSMR26 Calibrator for Signal Generators & Attenuators features linearity values equal to or even better than those of the present industry standard.

After warmup, the Rohde & Schwarz FSMR26 Calibrator for Signal Generators & Attenuators offers excellent level stability. This allows measurements to be performed with high accuracy over extended periods of time, for example during manual calibration.

High tolerance with respect to frequency drift and residual FM
The Rohde & Schwarz FSMR26 Calibrator for Signal Generators & Attenuators measures the signal level within the selectable  measurement bandwidth. For signals within the measurement bandwidth, level measurement is not affected by frequency drift, frequency deviation or residual FM. Featuring a large, selectable measurement bandwidth from 100 Hz to 10 MHz, the Rohde & Schwarz FSMR26 Calibrator for Signal Generators & Attenuators is insensitive to frequency offset or residual FM of the generator to be calibrated. Very small levels are measured using the narrow detector, which determines the signal power within the measurement bandwidth with FFT at a reduced  noise bandwidth. This yields an improved signal-to-noise ratio without increasing the effect of frequency offset or residual FM.