| 摘要 |
A detector of digital dictaphones relates to operational equipment and can be used in systems for technical information protection and at implementation of search measured. Detector is based on analysis of side electromagnetic radiations of operating dictaphones and includes a frame antenna, narrow band receiver and power supply source connected to vibratory-type annunciator and power supply stabilizer. There additionally is included a rod antenna connected to the first input of scanning receiver output of which connected to the input of the second analog-to-digital converter. Its output it is connected to the third digital input of the processing and control block, its second digital input is connected to the output of the first analog-to-digital converter input of which is connected to the output of the broadband receiver input of which is connected to the output of the frame antenna. The first digital input of the processing and control block is connected to the output of the information entry unit, and its digital output is connected to the input of the indication block. The first, second, third and fourth analog outputs of the processing and control block are connected to the inputs of the narrow-band receiver, scanning receiver, vibratory-type annunciator and analog output of the detector. Its analog inputs are connected to outputs of the narrow-band and scanning receivers. The output of power supply stabilizer is connected to scanning receiver, the first and the second analog-to-digital converters, processing and control block and indication block. The detector provides increase of reliability of detection of digital dictaphones in different electromagnetic media and operation speed at processing information obtained. |
