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Mobile spectrum analyzers suit up for field work

Posted: 26 Nov 2008 ?? ?Print Version ?Bookmark and Share

Keywords:mobile spectrum analyzer? RF network?


Rohde & Schwarz is presenting two all-purpose instruments for mobile spectrum analysis: the R&S FSH4 and the R&S FSH8. Both analyzers are rugged, handy and lightweight. They also come equipped with a powerful battery pack. The R&S FSH4 and R&S FSH8 cover the frequency range from 9kHz to 3.6GHz or 8GHz. Depending on the options installed, they can also be used as two-port vector network analyzers, as cable and antenna testers or as power meters. This means that they support almost all RF measurement tasks encountered in service, installation and maintenance applications.

Mobility, ease of operation, superior measurement characteristics and versatility are the assets that make it possible for the new analyzers to simplify and facilitate daily work. Their low weight of only 3kg (including battery) and their compact size make them suited for mobile use. The battery can power up to 4.5 hours of operation. If the field work takes longer, on-site replacement of the battery poses no problem. Since the analyzers conform to protection class IP51 and feature splash-proof, dust-protected connectors, they are reliable tools even under adverse ambient conditions.

In addition to their low weight and compact size, their vertical design makes the analyzers handy. The user can easily reach all keys without having to put down the instrument. Flat menu structures and separate keys for frequently used functions help ensure efficient work. The large, high-contrast VGA color display is easy to read even under difficult lighting conditions.

Thanks to their good RF characteristics, the analyzers are top in their class: A displayed average noise level of e.g. "163dBm (1Hz) at 2GHz and a preamplifier that can be activated on all models can measure even very small signals reliably. In the presence of multiple strong signals, the analyzers' large-signal immunity helps prevent internal interference. Featuring third-order intercept of 15dBm in the common mobile radio bands, the analyzers perform comparably to high-end desktop models. The level measurement uncertainty is low and amounts to maximal 1dB for measurements up to 3.6GHz and maximal 1.5dB up to 8GHz.

Besides the base models, Rohde& Schwarz offers models with built-in tracking generator as well as models with an integrated VSWR bridge for vector network analysis. Sensors that are also available convert the analyzers into high-precision power meters. This means that the analyzers provide all the functions for the installation and maintenance of radio transmitter systems in a single box: assessment of transmission spectrum, detection of interference, measurement of transmit power, checking of antenna matching, verification of the amplifiers on the antenna, and measurement of the antenna cable quality.

Windows software is supplied with the analyzers for recording and evaluating measurement results. The software also supports maintenance teams with large equipment pools in administering instrument setups. This feature eliminates the need to configure each instrument separately. The analyzer connects to a PC via LAN or USB interface. Since practically all functions can be remote-controlled, the handheld analyzers can be integrated into customer-specific programs.

- Wolfgang Patelay
Industrial DesignLine Europe

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