Patent ID: 7120407

Claim:
A tracking adjusting method of performing tracking adjustment of a receiver which comprises: a high frequency receiving circuit receiving a broadcast wave at a received frequency according to a tuned voltage; a local oscillator generating a local oscillation signal at a frequency according to a control voltage; a mixing circuit mixing a signal, which is outputted from the high frequency receiving circuit, and the local oscillation signal, and outputting an intermediate frequency signal corresponding to a differential frequency thereof; an offset circuit setting a predetermined offset voltage to the control voltage; and a multiplier circuit performing analog multiplication of a predetermined multiplier to the control voltage, and applies a voltage, which is the control voltage passed through the offset circuit and the multiplier circuit, as the tuned voltage to the high frequency receiving circuit, the tracking adjusting method of a receiver characterized in comprising: a first step of setting a received frequency of the receiver at an arbitrary value included in its variable range and inputting a predetermined test signal having the same frequency as the received frequency at this time into the high frequency receiving circuit; and a second step of setting a value of the offset voltage set by the offset circuit so that a tracking error of the receiver after various kinds of settings being performed at the first step may become at a minimum.