Patent ID: 9735900
Date: 2017-08-15
CPC Classifications: H04B,H04L

Claim:
1. A hybrid network analyzer comprising: a test signal source configured to provide a band-limited multi-tone test signal having a tunable center frequency; a local oscillator (LO) source configured to provide a tunable LO signal, the tunable LO signal being tunable to track the tunable center frequency of the band-limited multi-tone test signal; and a receiver configured to convert into an intermediate frequency (IF) signal using the tunable LO signal one or both of the band-limited multi-tone test signal and a response signal from a device under test (DUT) produced in response to the band-limited multi-tone test signal, the IF signal comprising a plurality of IF tones corresponding to tones having different frequencies from one another within the band-limited multi-tone test signal, wherein: the test signal source is further configured to provide a broadband multi-tone test signal having a bandwidth substantially spanning a test bandwidth of the DUT, and wherein the LO source is further configured to provide a broadband multi-tone LO signal, and wherein the receiver is further configured to convert into the IF signal using the broadband multi-tone LO signal one or both of the broadband multi-tone test signal and a response signal from the DUT produced in response to the broadband multi-tone test signal; or the test signal source is further configured to provide a single-tone test signal having a predetermined fixed frequency, the LO source being further configured to provide a broadband multi-tone LO signal, and wherein the receiver is further configured to convert into the IF signal using the broadband multi-tone LO signal one or both of the single-tone test signal and a response signal from the DUT produced in response to the single-tone test signal.