PXI bus programmable amplification/attenuation device and calibration method thereof

Abstract

The invention discloses a PXI (PCI Extension for Instrumentation) bus programmable amplification/attenuator device and calibration method thereof and belongs to the field of microwave signal conditioning. According to the invention, a single-block 3U single-slot PXI module is adopted for implementing programmable amplification and attenuation functions in wide frequency bands as wide as 80db at the same time, so that hardware resource is saved. Through flexible matching and cascaded connection of different signal conditioning circuits, signal amplitude conditioning range is increased and power calibration is performed on circuits at different temperatures and frequencies, so that measurement of microwave signals becomes more flexible and accurate.

Description

technical field [0001] The invention belongs to the field of microwave signal conditioning, and in particular relates to a PXI bus programmable amplifier / attenuator and a calibration method thereof. Background technique [0002] Microwave signal amplifiers and attenuators are used in the measurement process of radio frequency and microwave signals to improve the dynamic range of microwave measuring instruments. The purpose of the present invention is to adopt a single 3U single-slot PXI module to simultaneously realize the programmable amplification and attenuation functions of a wide frequency range, occupy a small volume and a small number of slots, increase the dynamic range of microwave measuring instruments, and make microwave Signal measurement is more flexible and accurate. [0003] At present, microwave signal measuring instruments and equipment are widely used. In order to improve the dynamic range of microwave measuring instruments, microwave signal amplifiers and...

AI Technical Summary

Problems solved by technology

Different amplifying or attenuating modules need to be replaced when the function changes, and when the adjustment range of a single amplifying or attenuating module is not large enough, multiple modules need to be cascaded, which increases the occupation of the amplifying and attenuating modules when the number of slots in the PXI chassis is certain. The number of slots increases hardware resources while increasing power consumption and cost

[0008] 2. The power control of the signal is not accurate enough

[0009] In the wide frequency range of 100KHz-8GHz, there will be large errors in the amplification and attenuation of the signal through the conditioning channel

And in different temperature ranges, the actual amplification and attenuation of the conditioning channel are quite different from the user's set value.

[0010] 3. The calibration of the signal is not accurate enough

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