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General information about your detector:

The heterodyne detector (HD):

A   heterodyne   detector   works   similar   to   a   broadcast   receiver.   The 

frequency   you   have   chosen   will   be   subtracted   from   the  bat  call  with  a 

bandwidth of +/- 5 kHz transforming it to the audible range.

As an example : Detector is set to 42 kHz

Call frequency

Setting

Difference

Effect

48 kHz

 

6 kHz 

not/barely hearable

47 kHz

 

5 kHz

hearable

46 kHz

 

4 kHz

hearable

45 kHz

 

3 kHz

hearable

44 kHz

 

2 kHz

hearable

43 kHz

 

1 kHz

hearable

42 kHz

42 kHz

0 kHz

not hearable

41 kHz

 

1 kHz

hearable

40 kHz

 

2 kHz

hearable

39 kHz

 

3 kHz

hearable

38 kHz

 

4 kHz

hearable

37 kHz

 

5 kHz

hearable

36 kHz

 

6 kHz 

not/barely hearable

You can use the HD detector like a radio and search the whole ultrasonic  

range for bats. A bat call has a wider range than one frequency, so you  

will be able to hear it across the whole 10 kHz window of the detector. 

When turning the thumbwheel you can now hear the frequency and the 

volume changing. Try find the best and loudest playback of the call. The 

display then shows the peak frequency of the call.

Ultrasonic sources which emit single frequency sine or square wave signals 

will be heard on the detector as a beeping signal. If the frequency of the 

detector is similar to the frequency of the source there will be no audible 

signal at all. This is because you are subtracting the detector frequency 

from the source signal with the result of 0 kHz. If you now tune up or 

down you will hear a rising beep.

Heterodyne detectors are used for manual data collection. It is the easiest 

way to identify species in the field depending on the quality of the call and 

the shown frequency. It is very difficult or even impossible to gain results 

as precise as these by using FD or TE detectors in the field. If you want to 

analyse a recorded heterodyne signal you have to know the original call 

frequency.   The   benefit   of   analysing   software   is   very   limited   with   HD 

recordings.

Содержание Batz 2.0

Страница 1: ...BATZ 2 0 CE10504 ciel EaM Manual V4 0 0 E ...

Страница 2: ... detector is not a toy Danger of choking Small parts Not suitable for children under 3 years Loud noises especially on headphones may damage your ears Never use the detector with headphones near any hazardous places traffic etc as you might not be aware of any upcoming danger ...

Страница 3: ......

Страница 4: ...ness to provide good readability at dawn and at night without overexerting your eyes C Loudspeaker For a clear reproduction of the bat calls two 0 5 watt microspeakers are integrated in the detector D On Off switch Switch to turn your detector on and off E Recording button To start recording and playback and erase the detector s call memory F Volume Push button to set the volume to the level requi...

Страница 5: ... the detector When turning the thumbwheel you can now hear the frequency and the volume changing Try find the best and loudest playback of the call The display then shows the peak frequency of the call Ultrasonic sources which emit single frequency sine or square wave signals will be heard on the detector as a beeping signal If the frequency of the detector is similar to the frequency of the sourc...

Страница 6: ...and to compensate for fluctuations of temperature and voltage the HD mode will be recalibrated every time the detector is switched on or switched into HD or TE mode A battery can be used until it s end of life Testing your detector You can test your detector by setting the detector to a low frequency up to 25 kHz and rub your fingers 30cm from the microphone You should now hear this noise very cle...

Страница 7: ...g are not displayed Deleting a recording To delete a recording hold the Rec Button E for 3 seconds or longer The detector will confirm the deletion by showing del in the display The memory LED will switch off and the detector is now ready for a new recording Only one recording at a time can be held The recording is saved in a volatile memory and will also be deleted if the detector is switched off...

Страница 8: ... apply if The warranty seal has been tampered with and is broken The housing and or electronics have been mechanically stressed are deformed or have been broken The detector has been damaged i e Through leaking batteries or any other leaking fluids Declaration of conformity This product is in compliance with the essential requirements of ROHS European Directive 2011 65 EU dated on 08 06 2011 for t...

Страница 9: ... 18 130 kHz Bandwidth 10 kHz 5 kHz Internal recording 44 1kHz sample rate 8 Bit Memory 1 Mbit Sram Speaker 2 x 0 5 watts microspeakers Connectors 3 5 mm stereo jack headphones Power supply 9 volts battery Voltage min 6 7 volts max 12 volts Power consumption Average 35 40 mA max 45 mA Dimensions B x H x T 79 x 118 x 24 mm Weight without battery 142 g Included in delivery Detector Brief instructions...

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