Rohde & Schwarz FSVR real-time spectrum analyser

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The FSVR real-time spectrum analyser is claimed to be the first instrument to combine the functions of an all-purpose signal and spectrum analyser with a real-time spectrum analyser.

In real-time mode, it detects everything, from sporadic events to ultrashort signals. Measurement without blind times is a major advantage for developers of RF components for commercial transmission systems such as LTE, WiMAX, WLAN, Bluetooth and RFID, and for general RF applications such as radar and frequency hopping transmission.

Designed on the basis of the FSV, the latest instrument provides the full functionality of a signal and spectrum analyser - with a claimed measurement speed up to five times faster than any other analyser.

Compared with a conventional spectrum analyser, which sweeps across the entire input frequency range of several GHz, a real-time analyser measures the spectrum around a user-selectable input frequency.

It acquires the applied signal with the selected span and displays its spectrum. Even ultrashort and very sporadic signals are detected.

The behaviour of signal sources when the frequency changes or the impact of digital switches, for example, can be quickly analysed.

In the real-time mode, the instrument captures RF signals with a bandwidth of up to 40 MHz, computes up to 250,000 spectra/s and displays the result graphically. Many display modes and measurement functions are available to visually and metrologically analyse the results.

In the persistence mode, the analyser outputs a color-coded display of the probability distribution of occurring frequencies and amplitudes over the length of time selected by the user (persistence period).

This gives the user an impression of the behaviour of signals over time. Fast frequency hops of a transmitter and significant short-term amplitude changes are made visible.

The spectrogram function displays the spectrum in the time domain. Users also need this function for wireless transmissions which have frequent changes in frequency. Typical examples are RFID and Bluetooth. These frequency hops can be tracked making it easy to characterise the transmitter.

The instrument provides a frequency trigger designed especially for very sporadic signals. This frequency mask trigger responds to definable events in the spectrum.

When the analyser is not in the real-time mode, it can be used as a signal and spectrum device. It offers all the functions of the general-purpose FSV analyser plus many of its options for measuring RF parameters and analysing digitally modulated signals.

It supports mobile radio standards such as GSM/EDGE, WCDMA, TD-SCDMA, WLAN, WiMAX and LTE. With more than 1000 sweeps/s, it is up to five times faster than other spectrum and signal analysers.

Three models of 7, 13 and 30 GHz are available.