Related Manuals for Pettersson D240x
Summary of Contents for Pettersson D240x
- Page 1 ULTRASOUND DETECTOR D240x OPERATING INSTRUCTIONS www.batsound.com Phone:+46 1830 3880 Fax :+46 1830 3840 e-mail: info@batsound.com...
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Page 2: Getting Started
(e.g. Barataud: The inaudible world available from Pettersson Elektronik). The D240x transforms ultrasound in the range 10 - 120 kHz into the audible frequency range. Although the main application for the D240x is studying bioacoustic ultrasound (bats, rodents, bush crickets etc.), the detector can be used in many other situations where detection of ultrasound is... - Page 3 The D240X comes with a soft carrying case. For protection of the detector we recommend you keep it in this case when not in use. The detector should be placed with the display upwards in the case.
- Page 4 This technique is similar to recording a sound on a tape recorder and then replaying the tape at a reduced speed. However, in the D240x the signal is not stored on a magnetic tape but in a digital memory. The time expansion principle is unique in the sense that it is the only ultrasound conversion system that retains virtually all characteristics of the original signal, so time expanded signals are well suited for many forms of advanced signal analysis (e.g.
- Page 5 In some situations, you may want to automatically dump the time expanded calls onto a tape recorder. This can be achieved using a voice activated tape recorder. However, the D240x also has an output which can be used to control a relay, which in turn can turn on/off a tape recorder. A separate relay unit will be available from Pettersson Elektronik.
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Page 6: Input Gain Control
INPUT GAIN CONTROL In order to avoid overloading the input amplifier, the D240x has an overload indicator and an adjustable input gain control. If the signal is overloaded, spurious harmonics will be created. Such a signal should of course not be used for analysis. - Page 7 If the input impedance of the tape recorder is very low (lower than 5 kohms), the signal levels in the detector will be decreased, resulting in a weaker output to the loudspeaker or headphones. Any tape recorder connected to the TAPE output should be battery powered. The maximum length of any connected cable is 1 meter.