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1. (WO2018060352) PULSED RADAR LEVEL GAUGE WITH SINGLE OSCILLATOR

Pub. No.:    WO/2018/060352    International Application No.:    PCT/EP2017/074666
Publication Date: Fri Apr 06 01:59:59 CEST 2018 International Filing Date: Fri Sep 29 01:59:59 CEST 2017
IPC: G01S 7/28
G01S 7/288
G01S 7/282
Applicants: ROSEMOUNT TANK RADAR AB
Inventors: ERIKSSON, Mikael
Title: PULSED RADAR LEVEL GAUGE WITH SINGLE OSCILLATOR
Abstract:
A pulsed radar level gauge for determining the filling level of a product contained in a tank, comprising a frequency generator (10) for generating a Tx frequency signal and a Rx frequency signal. The frequency generator includes one single oscillating crystal (21) for providing an oscillator frequency fosc and frequency modifying circuitry (22). The frequency modifying circuitry comprises a path including a PLL (24) configured to receive said oscillator frequency fosc as input frequency and deliver a regulated output frequency being equal to the oscillator frequency fosc multiplied M/N, and a frequency divider (25) connected to receive the regulated output frequency and deliver an output frequency equal to the regulated output frequency divided by an integer factor P. A PLL combined with an integer frequency divider is used to generate at least one of the Tx and Rx frequencies based on an oscillator frequency provided by one single oscillator.