Pettersson D240x Скачать руководство пользователя страница 6

Please note that not all tape recorders can be used for this. It is required that the recorder can be left 
with the "RECORD" button permanently activated and that it is possible to connect the output of the 
relay in series with the recorder’s batteries or power supply. Please note that the maximum ratings 
(current and voltage) of the relay must not be exceeded! For information on the maximum ratings 
please refer to the specifications for the relay! 
 
Please also make sure that the recorder starts quickly enough. Most recorders require at least one 
second to start recording.  

 
 
High-speed replay 

 
When the NORMAL/TE

HET switch is in the TE

HET position, the signal in the time expansion 

memory will be replayed at its original rate, as described above. The signal from the time expansion 
system is also available at the RELAY OUTPUT connector. As opposed to the TE signal at the TAPE 
jack, this output is not lowpass filtered. So, if you have access to an ultrasonic transducer 
(“loudspeaker”), you can use this output to replay the captured sequence in its original shape. The 
impedance of any device connected to this output should be at least 500 ohms.    
 

 

              The “Relay Output” Connector (top view) 

 

1 and 2 – relay output (if polarized, 1 = positive, 2 = negative) 
3 and 4 – signal output (3 = signal, 4 = ground) 
5 – polarizing hole for the connector   

 
NOTE: If you wish to connect equipment other than Pettersson Elektronik’s to this connector, please 
first contact us for instructions. Please also be careful not to let metal objects enter the case of the 
detector through the relay output connector opening, since this may damage the detector. 
 
 

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. If the OVERLOAD indicator flashes frequently, you 
should set the GAIN switch to LOW. The actual gain in the LOW position is determined by the setting 
of the GAIN control. To adjust this, use a small screwdriver or similar (the control is located about 5 
mm below the front panel). Usually, this is not necessary to do very often, you will probably find a 
suitable setting and you will then only use the switch to change the input sensitivity when required.  
 
 

OUTPUTS  
 

The two 3.5 mm sockets are used to connect a set of headphones or a tape recorder. The TAPE output 
is not affected by the setting of the volume control or the HET/TIME EXP switch. When the COM 
switch is pressed, the time expansion output signal is temporarily replaced by the amplified 
microphone signal, enabling the recording of spoken comments on the tape.  

Содержание D240x

Страница 1: ...ULTRASOUND DETECTOR D240x OPERATING INSTRUCTIONS www batsound com Phone 46 1830 3880 Fax 46 1830 3840 e mail info batsound com...

Страница 2: ...ckwise to switch the detector on The LCD display now shows the tuned frequency heterodyne system only and the LCD backlight is turned on The LCD backlight also serves as a battery condition indicator...

Страница 3: ...nge from appr 25 to 35 kHz will be transformed This is illustrated in the figure below Let s assume an ultrasonic signal with constant frequency is emitted When the frequency control of the D240x is t...

Страница 4: ...ime expanded sounds headphones should be used to monitor the sounds Listening to the heterodyne system through the speaker while sampling a signal to the time expansion system will cause the high freq...

Страница 5: ...signals between approximately 25 and 35 kHz This is useful to reduce the influence from background noise or to make the detector capture only certain species It should be noted that even if the detect...

Страница 6: ...nal output 3 signal 4 ground 5 polarizing hole for the connector NOTE If you wish to connect equipment other than Pettersson Elektronik s to this connector please first contact us for instructions Ple...

Страница 7: ...PHONES output connections Technical specifications Type Heterodyne and time expansion x10 or x20 Frequency range 10 120 kHz min Display accuracy 0 15 kHz Bandwidth het 8 kHz 4 kHz 6 dB Sampling frequ...

Отзывы: