Patent ID: 7397312
Filing Date: 2008-07-08
Classification: G01R,H03J

Abstract:
1. A spectrum analyzer, comprising: a reference oscillator for providing a reference signal at a reference frequency; an error detection circuit connected to receive said reference signal and a timing control signal and operable to determine an error in said reference frequency using said timing control signal and produce an error correction signal for use in correcting said error; a frequency conversion device connected to receive said error correction signal and said reference signal and is operable to produce an output frequency using said error correction signal to compensate for said error in said reference signal; an additional frequency conversion device connected to receive a radio frequency (RF) signal and a local oscillation signal produced from said reference signal and operable to convert said RF signal to an intermediate frequency (IF) signal using said local oscillation signal; an analog-to-digital converter connected to receive said IF signal and operable to convert said IF signal to a digital signal; and a processor including said frequency conversion device and connected to receive said digital signal and said error correction signal; wherein said processor is operable to process said digital signal using said error correction signal.