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Signal generator/VSA pairing support generic modulation, demodulation

04 Jan 2012

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Aeroflex has released its S-Series vector signal analyzers. The units are matched digital signal generators (SGD range) and VSAs (designated SVA), ranging from 6GHz and 13GHz. The devices occupy the same half-rack-width format similar to earlier S-Series instruments, and are completely touch-screen-operated, using all the available panel width for their displays. The instruments use PXI technology. Both units can be linked mechanically and electrically to provide an integrated generator/analyzer combination that includes embedded software tools to accurately generate and analyze complex wideband modulated signals to test systems and components. The SGD and SVA support generic modulation and demodulation.

The SGD-3 and SGD-6 both feature +13dBm output power, with a +20dBm option. They incorporate an IQ modulator with 300MHz RF bandwidth, which can generate wide bandwidth modulated signals. A dual channel arbitrary waveform generator (AWG) operating at up to 250 MSamples/ sec, with memory options up to 4GB, offers faster waveform generation and the ability to store multiple signals. The embedded IQCreator waveform generation tool enable a modulation scheme and creates an arbitrary waveform generator (AWG) file using modulation templates.

The SGD has single sideband (SSB) phase noise of -135dBc/Hz at 1GHz offset, and a frequency settling time of 100μsec. The high dynamic range of the IQ modulators provides for an Adjacent Channel Leakage Ratio (ACLR) of -71dBc on WCDMA signals.

The SVA can accept peak signal power levels up +30dBm, and maximum sensitivity is -148dBm/Hz, enabling measurement of transmitter spurious outputs. The noise floor at 2GHz is -138dBc/Hz at 10MHz offset, and frequency settling can be as fast as 250μsec at frequencies up to 6GHz.

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