IFR Marconi 6844

IFR Marconi 6844
Manufacturer: IFR/Aeroflex
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IFR Marconi Microwave System Analyzer The unique 6840 series of Microwave System Analyzers from IFR (Wichita, KS) now offers group delay measurements of components through to complete radios. The MSA┬┐s ability to measure frequency converting devices and networks by combining a spectrum analyzer with a fully synthesized source and scalar analyzer has been enhanced by the addition of frequency modulation and group delay options. An essential feature of a communications link or signal processing device is its ability to convey information without distortion. This requires a flat amplitude response and a linear phase response over the bandwidth of interest. Phase linearity is commonly specified in terms of group delay flatness, which is traditionally measured with a vector network analyzer. Whilst these instruments have high accuracy there are complications when characterizing frequency converting devices. By using the receiver in the spectrum analyzer as a tuned scalar input, the MSA with group delay option overcomes such problems and provides a more cost-effective solution. The source is frequency modulated with a known low frequency and applied to the device under test (DUT). After passing through the DUT, the signal is demodulated and the recovered low frequency is phase compared with the original modulating signal. The envelope delay is the average value of group delay over the modulated signal bandwidth. The bandwidth of the modulated signal is known as the measurement aperture and needs to be small in comparison with the group delay variations for accurate measurements. The IFR MSA series comprises 7 models with source and spectrum analyzer frequency ranges in several combinations from 1MHz to 24GHz.

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