公开(公告)号：US20240283549A1

公开(公告)日：2024-08-22

申请号：US18444452

申请日：2024-02-16

Applicant: Tektronix, Inc.

Inventor： Archana I. Akkalkot ,  Alka Kumari ,  Sakchi Sinha

IPC: H04B17/20 ,  H04B17/00 ,  H04B17/309

CPC classification number: H04B17/201 ,  H04B17/0085 ,  H04B17/309

Abstract: A test and measurement system includes a proximity coupling device to transmit a modulated carrier signal and a proximity integrated circuit card to load modulate the transmitted modulated carrier signal and generate a modulated subcarrier signal on the wireless carrier signal. A test and measurement instrument acquires the modulated carrier signal and includes a phase-aligned subcarrier demodulator to demodulate the carrier signal including the modulated subcarrier signal. A demodulator detects commands and responses in the modulated carrier signal, removes the commands, and identifies a correlation index for each response. Each correlation index indicates a phase of the modulated carrier signal of the corresponding response relative to a replica carrier signal. The demodulator adjusts the phase of the replica carrier signal based on the correlation index for each response and down converts each response using the phase-aligned replica carrier signal. The modulated subcarrier signal is low pass filtered to demodulate response.

公开(公告)号：US20250067777A1

公开(公告)日：2025-02-27

申请号：US18807267

申请日：2024-08-16

Applicant: Tektronix, Inc.

Inventor： Niranjan R Hegde ,  Archana I. Akkalkot ,  Sushree Sangita Dash

IPC: G01R13/02

Abstract: Systems and methods implement measuring, in a test and measurement instrument, operational signal timing parameters of electrical signals being communicated over an electrical bus by a device under test. A bus timing characteristics analyzer identifies nominal signal timing parameters for the acquired electrical signals. The nominal signal timing parameters are defined by the bus protocol and defining timing criteria for the electrical signals. The analyzer measures operational signal timing parameters for each of the acquired electrical signals and compares, for each of the electrical signals, the operational signal timing parameters to the nominal signal timing parameters to determine whether the operational signal timing parameters satisfy the timing criteria. The analyzer then displays, on the test and measurement instrument, a visual indication for each of the electrical signals indicating whether the operational signal timing parameters for the electrical signal satisfy the timing criteria.