Lower noise, higher dynamic range for mmW, µW measurements

November 25, 2016 // By Graham Prophet
Anritsu has introduced the MS2840A-051 Noise Floor Reduction and MS2840A-019 2 dB Step Attenuator for millimeter-wave options for its MS2840A signal analyzer series. The NFR and 2 dB step attenuator options address, primarily, phase noise performance.

Ensuring wideband and low error rate radio signals in the microwave and mmWave bands requires the use of transmitters with high dynamic range performance, bringing with it the need for high-dynamic range measuring instruments to optimise designs, in particular, those associated with noise interference.


The noise floor reduction (NFR) option subtracts up to 11 dB from the measured internal noise level of the measurement system, to lower the displayed noise floor and support more accurate measurement of very low-level signals than has been possible previously. In addition, the 2 dB Step Attenuator option can set a 0 to 60 dB attenuator with 2 dB steps across the entire frequency range for the 44.5 GHz model, versus a standard specification of 0 to 60 dB attenuation in 10 dB steps. This option improves the measurement dynamic range by optimizing the mixer input level even at high frequencies.


These latest options are especially useful for measuring wideband signals and microwave and mmWave signals requiring measurement of spectrum emissions, adjacent channel leakage power, and high-dynamic range signals at Tx ON and OFF.


The MS2840A signal analyzer offers close-in phase noise performance comparable to that of high-end analyzers. There are four models with different maximum measurement frequencies of 3.6, 6, 26.5, and 44.5 GHz. The 26.5 and 44.5 GHz models can be expanded to cover a measurement frequency range up to 325 GHz by connecting an external mixer.


Anritsu; www.anritsu.com