PURPOSE: To facilitate the operation, to simplify the circuit constitution and to reduce the cost by applying print pattern wiring to temperature compensation data wires setting a temperature compensating data subjected to fixed input to a temperature compensation means based on an oscillating frequency of an oscillator onto a circuit board in a way to be broken.

CONSTITUTION: When the temperature compensation data of a crystal oscillator 14 is 1100, for example, to a control circuit 13, the parts 3a, 3b formed to be narrow of temperature compensation data wires 1a, 1b in temperature compensation data wires 1a∼1d are blown by using a laser or the like. Thus, the potential of input setting lines L1, L2 rises up to a high level and the potential of parts 3c, 3d formed to be narrow of the temperature compensation data wires 1c, 1d not blown by the laser is held at a ground potential. As the result, a desired temperature compensation data 1100 is outputted to input setting lines L1∼L4. Thus, the temperature compensation data is set to the crystal oscillation circuit of the temperature compensation time economically. Moreover, the breaking process of the temperature compensation data wires is facilitated.