Provided are an automatic trigger type identification method and device and an oscilloscope, which belong to the field of oscilloscopes. The method includes analyzing characteristic parameter data of a to-be-triggered signal. The characteristic parameter data comprises at least one of bus protocol matching information or variation information of at least one characteristic parameter. In this way, a trigger type capable of stably triggering the to-be-triggered signal can be obtained for user selection or automatic selection for trigger.

An oscilloscope includes a signal input circuit, a switching matrix circuit, and a downconverter circuit. The signal input circuit is configured to receive M input signals, wherein at least one of the input signals is a signal comprising at least two carriers. The switching matrix circuit is configured to selectively forward at least one input signal from at least one of the switching matrix inputs to the switching matrix outputs. The downconverter circuit includes a local oscillator and at least two downconverter sub-circuits. The at least two downconverter sub-circuits are configured, for example, to: down-convert a first signal component of the signal that is associated with a first one of the least two carriers based on a local oscillator signal and down-convert a second signal component of the signal that is associated with a second one of the least two carriers based on the local oscillator signal, respectively.

A voltage monitoring circuit is disclosed. An apparatus includes a first physical interface circuit and a real-time oscilloscope circuit configured to monitor a first voltage provided to the first physical interface circuit. The real-time oscilloscope is configured to receive an indication that an error was detected in data transmitted from the first physical interface to a second physical interface circuit. The real-time oscilloscope is further configured to provide for debug, to a host computer external to the first interface, information indicating a state of the first voltage at a time at which the error was detected.

A method for performing predictive maintenance of an amplifier module is described. At least one parameter of at least one amplifier module is acquired via a measurement data acquisition unit. The at least one parameter acquired is analyzed via a measurement data analyzing unit so as to predict the probability and/or time of default of the at least one amplifier module. Further, a system is described.

The present invention provides a system for data mapping and storing in digital three-dimensional oscilloscope, wherein the fixed coefficients, which are calculated according the parameters and settings of a digital oscilloscope, are stored into a fixed coefficient memory CO RAM, the fixed coefficients are outputted to N fractional operation units through N−1 D flip-flop delay units to multiply with the acquired data x(n) and then be accumulated, thus N fractional calculus results are obtained. In this way, N fractional calculus results can be obtained by performing L/N fractional calculus operations. N fractional calculus results are sent to a signal processing and display module, in which they are converted into a display data through a drawing thread, and the display data are sent to LCD for displaying, thus the fractional calculus operation and display of a input signal in a digital oscilloscope is realized.

The present invention provides a system for data mapping and storing in digital three-dimensional oscilloscope, wherein the fixed coefficients, which are calculated according the parameters and settings of a digital oscilloscope, are stored into a fixed coefficient memory CO RAM, the fixed coefficients are outputted to N fractional operation units through N−1 D flip-flop delay units to multiply with the acquired data x(n) and then be accumulated, thus N fractional calculus results are obtained. In this way, N fractional calculus results can be obtained by performing L/N fractional calculus operations. N fractional calculus results are sent to a signal processing and display module, in which they are converted into a display data through a drawing thread, and the display data are sent to LCD for displaying, thus the fractional calculus operation and display of a input signal in a digital oscilloscope is realized.

A test and measurement instrument includes an auxiliary trigger input port for receiving an auxiliary trigger signal, a digital trigger processor for generating a digital trigger signal from the auxiliary trigger signal, an analog trigger processor for generating an analog trigger signal from the auxiliary trigger signal, a user-configurable selector coupled to the digital trigger processor and to the analog trigger processor, the user-configurable selector configured to output either the digital trigger signal or the analog trigger signal as a selected trigger output signal of the instrument. Methods of creating parallel triggers are also described.

A measurement instrument for acquiring an input signal is described. The measurement instrument includes a first acquisition path with a first acquisition circuit having a first sampling rate. The measurement instrument includes at least one second acquisition path with a second acquisition circuit, having a second sampling rate. The measurement instrument is configured to acquire the input signal with an overall sampling rate being higher than the first sampling rate and the second sampling rate. The first acquisition path and the at least one second acquisition path each have a decimation filter and a decimator connected in series to the decimation filter, thereby equalizing a low frequency band in the input signal when processing the input signal. Further, method of acquiring an input signal is described.

A measurement device, such as a power meter or power submeter, may comprise a frame disposed in a housing dividing an interior volume of the housing into a first volume and a second volume. An external power source is connected to the device in the first volume and the frame may serve as an insulative barrier between the first volume and an exterior it and the housing. The device may alternatively, or additional include, an user interface assembly that is configured to mounted in a same orientation regardless of an orientation of the device or housing of a device relative to the external power source.

A measurement device, such as a power meter or power submeter, may comprise a frame disposed in a housing dividing an interior volume of the housing into a first volume and a second volume. An external power source is connected to the device in the first volume and the frame may serve as an insulative barrier between the first volume and an exterior it and the housing. The device may alternatively, or additional include, an user interface assembly that is configured to mounted in a same orientation regardless of an orientation of the device or housing of a device relative to the external power source.