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The KMR-361 device, available in the basic and professional versions, allows the search for audio interference emitted by ultrasonic frequencies.
The basic model of KMR-361 heterodyne frequency conversion detector is small and lightweight with a large digital display backlits by LEDs that allow you to monitor the tuned frequency. It's able to capture even the lowest noise thanks to the heterodyne advanced technology able to increase the signal of interest.
The professional model of the new KMR-361 ultrasound detector is enhanced by the heterodyne demodulation system able to obtain greater frequency division and time expansion. The detector involves a built-in 16-bit recording system using a Compact Flash card (CF). It's equipped with high-quality microphone which give lower noise and lower distortion.
The ultrasound detector also has a built-in recorder, relieving the user from the hassle of using a separate recording device. It can be configured in many operating modes, but thanks to the use of “Profiles”, switching between different modes is made immediately.
Each profile contains all the selectable settings such as sampling rate, triggering mode, time expansion factor and LED intensity and can be prepared in advance and saved in the detector.
Either the direct ultrasonic signal, the heterodyne signal or the frequency division signal can be recorded, at any time, onto the CF-card. Spoken comments can be recorded by speaking into the microphone while recording in the direct mode, or in a special comment recording mode (at a lower sampling rate). Upon completion of a recording in the direct mode, the signal can be automatically replayed in time expanded form.
Time expansion factors from 1 (original speed) to 30 can be chosen. The recordings can be made by manually starting and stopping or through level-activated (and optional frequency selective) triggering. In this case, the detector can be set up for unattended capture of calls.
In the wav files on the CF-card there are date and time and can be read directly on a PC, using a standard CF-card reader. The detector also has a serial GPS input, making it possible to save GPS position data in the files.
Frequency range: 10kHz-120kHz (min.)
Frequency step: +/- 0,15kHz
Band width: 8kHz (+/- 4 kHz), -6dB
Battery: 1 x IEC 6LF22 (9V)
Consumption at rest: 17mA, LCD backlight included
Size: 119 x 60 x 25 mm, knob included
Weight: 150g batteries included
Outputs: 2 x 3.5mm jack for headphones and recorder
Type: heterodyne, frequency division (x10)
Frequency range: 5kHz-235kHz (min.)
Sampling rate: 5kHz - Activating the high pass filter it results in a frequency limit below 20KHz
Frequency of heterodyne resolution: 0,1kHz (f<17.8 kHz) - 0,2kHz (18-43kHz) - 0,5kHz (43.5-107kHz) - 1kHz (108-235kHz)
Audio output: 3.5mm stereo jack, 32 ohms or greater load impedance
Uscita HF/MEM: 3.5mm stereo jack, load impedance 500 ohms or greater, approx 600 mVrms at 0dB
Batteries: 5 x AA, Alkaline or NiMH recommended
External DC power supply: 7-10V, 250mA (minimum), 700mA (maximum)
Size: 170 x 80 x 35 mm microphone excluded
Weight:600g batteries included
PROFESSIONAL KMR-351 RECORD/PLAYBACK SYSTEM
A/D converter: 16 bit
Anti-aliasing filter: adaptive
Sampling rate: 32, 44.1, 48, 96, 100, 192, 200, 250, 300, 384, 400, 500, 750, 768kHz
Frequency resolution factor: 1, 2, 3, 5, 10, 20, 30
D/A converter: 12 bit
PROFESSIONAL KMR-351 GPS CONNECTION (optional)
Interfaccia: RS-232 Protocol: NMEA 0183 Decoded sentences: GPGLL, GPGGA e GPRMC Baud rate: 4800 Baud
Protocol: NMEA 0183
Decoded sentences: GPGLL, GPGGA e GPRMC
Baud rate: 4800 Baud
Search for audio interference emitted by ultrasonic frequencies
Search for ultrasonic waves generated in precision processing
In general, in all those situations where it is necessary to identify ultrasonic frequencies