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Playing files
The D1000X can play any file that has been saved on the CF card. The replay sampling
frequency is determined by 1) the sampling frequency that was used when the file was
recorded, 2) the TE (time expansion) factor setting and 3) the setting of the switch
“Heterodyne source”. If this switch is set to NORMAL, the sampling frequency is determined
by 1) and 2) above, while setting it to MEM>HET gives a replay sampling frequency equal to
the recording sampling frequency regardless of the TE factor.
As an example, if the file was recorded with a sampling frequency of 500 kHz and the TE
factor is 10, then the replay sampling frequency will be 50 kHz if the MEM>HET switch is
set to NORMAL.
To play a file, press the PLAY key. The alternatives “PLAY”, “PLAYLOOP” and “LIST” are
displayed. To play a single file, select PLAY. To play a list of files (generated with the
D1000X Utility), select LIST, and then move to the desired entry.
If you select PLAY, the files present on the CF card will be listed. The last file is selected by
default, but using the UP/DOWN ARROW keys, any other file can be selected. To play the
selected file, press PLAY again. Changing the TE factor in the settings menu, will affect the
subsequent replay of files. A file replay in progress can be interrupted at any time by pressing
the PLAY key.
If you select PLAYLOOP, you can play files in a similar fashion as with PLAY, the
difference being that the selected file will be played continuously in a loop until canceled by
the user.
If you select LIST and press ENTER, the play lists currently available on the card will be
displayed. Move to the desired entry and press ENTER. The files in the selected play list will
be displayed. To start playing, press ENTER. The files in the selected play list will be
replayed in an “endless loop” fashion. To interrupt playing, press the PLAY key. In the “play
list” play mode, the files will be replayed at the original speed, i.e. the time expansion factor
will be 1 regardless of the chosen value in the current profile.
When the built-in loudspeaker or headphones are used, it is obviously only meaningful to
replay audible signals, including ultrasonic signals replayed with the appropriate TE factor. In
order to reproduce ultrasonic signals, an ultrasonic loudspeaker is required. In most cases, the
signal also has to be amplified before connecting it to the loudspeaker. The memory replay
output is located at the front of the detector, next to the microphone. The jack is marked
“HF/MEM” and the connection is shown below. The HF signal is the amplified microphone
signal, which can be used for making recordings of the unchanged, ultrasonic signal on other
recording devices. For both outputs, the load impedance should be 500 ohms or higher.
Note: When connecting a cable to the HF output jack, you should use the supplied cable or
another cable with a similar plug or the plug may not fit properly into the jack.
MEM HF
