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Spectrum analyzer allows quick signal detection

Posted: 28 May 2009 ?? ?Print Version ?Bookmark and Share

Keywords:spectrum analyzer? signal detection? communications?

RSA6000 spectrum analyzer

Tektronix Inc. has released the RSA6000 series of 6.2- and 14GHz spectrum analyzers designed for high-performance spectrum management, radar, defense and communications applications.

This real-time spectrum analyzers (RTSA) places special emphasis on capturing so-called "runt" pulses, elusive transients buried in larger signals or short pulses within a string of longer ones, and which often overlap in time and frequency with the desired signal, so they are especially hard to trap and separate. The RSA6000 series does this by adding advanced triggering on signals within signals, with numerous trigger qualifiers across time, frequency and amplitude parameters. Time-qualified and hold-off features eliminate false triggering, while an amplitude-qualified trigger captures runt signals; pulses of specific amplitude and/or width within a pulse train can also be isolated.

The units include a "DPX transform engine" for real-time signal capture and processing, which collects hundreds of thousands of spectrums per second over a 110MHz bandwidth, to minimize the chance of missing time-interleaved or transient signals during a broadband search. The "Trigger on This" function means that if you can an artifact on screen, the DPX Density trigger will allow you to make the analyzer trigger on it to capture relevant data.

Basic performance specifications include +17dBm third-order intercept at 2GHz (typ.); displayed average noise level of -151dBm/Hz at 2GHz; and 0.5dB absolute amplitude accuracy to 3GHz. The trigger function works on transients with a minimum duration of 10.3?sec in the frequency domain, and 20ns in the time domain, and includes a frequency mask to capture changes in the frequency domain.

DPX Density trigger allows defining, triggering on short, high-resolution pulses within longer ones, among other factors.

The RTSA includes numerous analysis functions, spanning various parameter correlations; power, spectrum, and statistics measurements for channel power, ACLR, power versus time, and spur search; phase and jitter measurements; as well as pulse and modulation measurements.

The RSA6000 entry-level unit begins at $77,900; it is also available as a user-installable upgrade package for existing RSA models, beginning at $9900.

- Bill Schweber
RF Designline

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