公开(公告)号：US20250052807A1

公开(公告)日：2025-02-13

申请号：US18233074

申请日：2023-08-11

Applicant: Rohde & Schwarz GmbH & Co. KG

Inventor： Julian HARMS

IPC: G01R31/28 ,  G01R27/32 ,  G01R35/00 ,  H04B17/21

Abstract: The present disclosure relates to a test and/or measurement system. The test and/or measurement system comprises a base unit which comprises: an LO signal source configured to generate an LO signal, a first LO port and a second LO port, wherein the LO signal source is connected to the first LO port and the second LO port, and an LO measurement device. The test and/or measurement system further comprises: a first external frontend which is connected to the first LO port of the base unit via a first cable, and which is configured to receive a first fraction of the LO signal from the first LO port, wherein the first external frontend comprises one or more calibration standards; and a second external frontend which is connected to the second LO port of the base unit via a second cable, and which is configured to receive a second fraction of the LO signal from the second LO port, wherein the second external frontend comprises one or more calibration standards. The test and/or measurement system is operable in a calibration mode in which: the first external frontend is configured to connect the first LO port with one of its one or more calibration standards, the second external frontend is configured to connect the second LO port with one of its one or more calibration standards, and the LO measurement device is configured to measure: the LO signal which is generated by the LO signal source, a reflection of the first fraction of the LO signal received at the first LO port, and a reflection of the second fraction of the LO signal received at the second LO port.

公开(公告)号：US20240380488A1

公开(公告)日：2024-11-14

申请号：US18592855

申请日：2024-03-01

Applicant: Rohde & Schwarz GmbH & Co. KG

Inventor： Matthias RUENGELER ,  Martin PESCHKE ,  Gerd HECHTFISCHER ,  Ingo DETTMANN ,  Christian DILLE ,  Julian HARMS

IPC: H04B10/2575

Abstract: An optical transmitter system for receiving and converting a radio frequency (RF) comprises an RF receiver circuit and at least two signal manipulation paths. The RF receiver circuit is configured to receive an RF signal. The at least two signal manipulation paths are connected with the RF receiver circuit, respectively, to receive the RF signal from the receiver circuit. The signal manipulation paths are configured to process the received RF signal, thereby obtaining a manipulated optical signal, respectively. Each of the signal manipulation paths comprises an electro-optical convertor. The electro-optical convertors are configured to convert RF signals into a corresponding converted optical signal. At least one of the signal manipulation paths comprises a signal manipulation unit configured to adapt a signal processed by the respective signal manipulation path based on at least one operation to obtain a manipulated signal.

公开(公告)号：US20250052846A1

公开(公告)日：2025-02-13

申请号：US18668790

申请日：2024-05-20

Applicant: Rohde & Schwarz GmbH & Co. KG

Inventor： Julian HARMS ,  Maximilian FRIESINGER

IPC: G01R35/00 ,  G01R27/28

Abstract: The application includes a test and/or measurement system having an RF signal source to generate an RF stimulus signal; a device port; a signal path connecting the RF signal source to the device port; a measurement unit coupled to the signal path to measure the RF stimulus signal propagating via the signal path to the device port and a measurement signal received at the device port. A bias tee couples to the signal path and includes a DC input port to receive a DC bias signal. The bias tee couples the DC bias signal into the signal path. The system operates in a calibration mode where at least four different calibration standards are alternately connected to the device port. The system couples the DC bias signal into the signal path during the connection of one or more of the calibration standard(s), but not with all of the calibration standards.