A measuring device comprises an interface, adapted to acquire a measuring signal, a triggering unit, adapted to determine at least one condition of the measuring signal based on an initial triggering condition, and a storage unit adapted to store data words, comprising changes of the at least one condition of the measuring signal and instances in time at which the changes of the at least one condition occur. Moreover, the measuring device comprises a parameter determination unit, adapted to determine at least one parameter from the data words and a parameter histogram unit, adapted to determine a parameter histogram of the at least one parameter.

A test and measurement device includes an input port to receive an input signal, a sampling circuit structured to generate a sample from the input signal, in which generating the sample from the input signal produces an amount of kickout energy, and an energy reducing circuit coupled between the sampling circuit and one or more other components of the test and measurement device, the energy reducing circuit structured to decrease the amount of kickout energy from the sampling circuit. The energy reducing circuit may include or be combined with a pick-off circuit. Methods are also described.

A method of automatically selecting a continuous time linear equalization (CTLE) filter includes capturing a response waveform for a channel of a communication link of a device under test (DUT), generating a set of candidate CTLEs, and automatically selecting the CTLE from the set of candidate CTLEs using the response waveform. A test and measurement instrument has a user interface, a port to allow the instrument to connect to a device under test (DUT), and one or more processors configured to execute code to cause the one or more processors to: generate a set of CTLE candidates; capture a response waveform for the channel; and automatically select the CTLE from the set of candidate CTLEs using the response waveform.

A method of automatically selecting a continuous time linear equalization (CTLE) filter includes capturing a response waveform for a channel of a communication link of a device under test (DUT), generating a set of candidate CTLEs, and automatically selecting the CTLE from the set of candidate CTLEs using the response waveform. A test and measurement instrument has a user interface, a port to allow the instrument to connect to a device under test (DUT), and one or more processors configured to execute code to cause the one or more processors to: generate a set of CTLE candidates; capture a response waveform for the channel; and automatically select the CTLE from the set of candidate CTLEs using the response waveform.

Embodiments of the present disclosure relate to a test and/or measurement instrument for measuring a radio frequency signal. The instrument has an input port, a measurement circuit configured to measure and digitize the radio frequency signal, thereby outputting a data stream. The instrument also has a trigger port configured to receive a periodic external trigger signal with periodically spaced trigger pulses. Further, the instrument has a trigger circuit configured to generate virtual trigger pulses based on the trigger pulses in the periodic external trigger signal. The instrument also includes an acquisition control circuit configured to receive the virtual trigger pulses. The acquisition control circuit is configured, upon reception of a virtual trigger pulse, to add a trigger information to the data stream generated by the measurement circuit.

The present disclosure discloses a two-point sampling optimized method and system for sinusoidal excitation-based frequency response measurement. A plurality of points are sampled at equal intervals within the starting frequency and ending frequency range as initial information, the interpolation error of each sub-frequency band is estimated according to existing sampling information, the sub-frequency band with the largest interpolation error is selected, two new sampling points are added within the sub-frequency band, and the above steps are repeated until the quantity of sampling points reaches the total quantity set by a user; and the user is asked whether new sampling points need to be added, if so, after the user specifies a new quantity of sampling points, the interpolation error of each sub-frequency band is estimated again and sampling continues, otherwise, the sampling ends. The present improves the practicality of a sinusoidal excitation-based frequency response measurement method.

An apparatus includes a clock signal input, a sampling circuit, and an estimation circuit. The clock signal input receives N time measurements. A time measurement denotes a respective portion of a given cycle of a clock signal. The sampling circuit is to generate a first sampled window based upon a first time measurement and a first previous time measurement received m time measurements earlier than the first time measurement. The sampling circuit is to generate a second sampled window based upon a second time measurement and a second previous time measurement received m time measurements earlier than the second time measurement. The estimation circuit is to estimate the frequency or period of the clock signal based upon the first sampled window and the second sampled window.