Title:
RADIO CORRESPONDENCE DEVICE
Document Type and Number:
Japanese Patent JPH1193476
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To quickly specify the reason and the position of which correspondence becomes impossible by a decode function on the receiver side and shorten a repairing time by providing a detecting means for detecting the operating condition of a decode means in a trouble diagnosis mode. SOLUTION: In a receiving circuit, carrier wave is amplified in high frequency by a RF amplifying part 221, oscillation of a high frequency an oscillation circuit 222 is controlled in the quenching frequency oscillated from a quenching oscillation part 223, and a demodulated signal is obtained from the signal of the carrier wave obtained by the RF amplifying part 221. In a low pass filter part 224, a high frequency oscillation component and a quenching oscillation component are removed from the demodulated signal, and the demodulated signal is amplified in low frequency by an AF amplifying part 225. In a trouble diagnosis mode, a CPU 205 is connected to the quenching oscillation part 223, and by detecting existence of the signal or the frequency of the quenching frequency, it is detected whether the receiving circuit is troubled or not. When correspondence becomes impossible by the trouble of a decode function on the receiver side, the reason and the position is quickly specified, a time required for repair is shortened, and the troubled part only can be exchanged.
Inventors:
ADACHI HISASHI
Application Number:
JP25057097A
Publication Date:
April 06, 1999
Filing Date:
September 16, 1997
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
E05B49/00; B60R25/01; B60R25/24; E05B83/36; H04L9/32; (IPC1-7): E05B49/00; B60R25/00; E05B65/20; H04L9/32
Attorney, Agent or Firm:
Yasunori Otsuka (1 person outside)