Keysight N5241A Service Manual

Also see for PNA-X N5241A: Security Features and Document of Volatility Manual Configuration guide Installation note

Contents

Keysight N5241A Service Manual Manual pdf 169 page image

Keysight N5241A/42A/49A Service Guide 5-29Theory of OperationNoise Measurement Group Operation (Option 029)The noise signals are mixed with the LO synthesized signal to produce IF noisesignals before being sent to the A7 noise receiver board.For frequencies between 10 MHz – 3 GHz, the noise signals bypass the A55noise downconverter, going to the A7 noise receiver board, where the signalsare amplified, filtered, and mixed with the LO synthesized signal to produce theIF noise signals.A7 Noise Receiver BoardIn the A7 noise receiver board, the IF noise signals from the A55 downconverterare further amplified and filtered before being sent to ADC for sampling. The 10MHz – 3 GHz noise signals that passed through the A55 noise downconverterare amplified, filtered, and mixed with the LO synthesized signal to produce IFnoise signals. These are filtered and sent to the ADC for sampling. In the ADC,the signals are processed and converted to digital form at the sampling rate of40 MHz. The digitized data is then sent to the A14 system motherboard via thedata bus.