The HPR727A from AMCAD Engineering is a Comb Generator for input frequencies from 10 MHz to 7 GHz. It provides a dual differential output and can be used in single mode with the unused output terminated with a 50-ohm load. This generator is calibrated with 10 MHz input signal using a NIST traceable comb generator and can generate output harmonic signals up to 40 GHz with an input signal of 7 GHz. It is developed for the characterization of nonlinear RF devices (transistors, amplifiers) that allow the measurement of absolute phase of the harmonic content of a signal. This comb generator can be used as a very broadband reliable EMC signal source reference for rapid and efficient testing. It requires a DC supply of 5 V and consumes less than 200 mA of current.
The HPR727A can be equipped with an external RF source and a broadband antenna, that allows this compact generator to evaluate small enclosures when used as a reference source for shielding effectiveness measurements. It is used in combination with IVCAD Software which enables an accurate phase-calibrated measurement of harmonic signals when measured with a Vector Network Analyzer, in order to provide a true RF waveform measurement at the DUT reference plane. This phase calibration standard allows optimizing the operating class of RF transistors using harmonic load tuning with IVCAD MT930C VNA based load pull measurement bench control and IVCAD MT930GA Time-Domain LSA software module.
This comb generator is available in an enclosure that measures 74 x 18 x 59 mm with an SMA input connector and two 2.92mm output connectors (male and female) for direct connection to wired test systems, or to an external antenna in order to generate test fields for evaluating radiated emission test systems.