PURPOSE: To enable the adjustment of a DC voltage applied to the variable capacity diode of a bandpass filter for determining the band of a received radio frequency signal in the receiving section of a business use VHF-band or UHF-band radiocommunication apparatus, specially a wide band receiver for receiving a multi-channel radio signal to be done by only the factory adjustment when manufacturing the wide band receiver.

CONSTITUTION: The entire radio frequency band width B that is specified for receiving is divided by band decrement width B of bandpass filter HPF desired to be realized so as to divide the band width B into n bands B1, B2-Bn, each of divided n bands B1, B2-Bn frequency data and band segment data are set in memory ROM1 in advance so that received radio frequency signals can sufficiently pass the bandpass filter HPF, wherein the CPU is operated by an external frequency setting switch SW to read necessary data from a relevant memory ROM and to convert the data to analog voltage V, and wherein the converted analog voltage V is applied to a variable capacity diodfe D that determines the character of bandpass filter HPF 10.