CTP Systems dBbox2, Руководство пользователя, Страница: 16 / 17

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The left key will move the arrow back the other way. If you wish to erase a character
just put in a space (next character up from small “z”). Do not press “Select” until you
have finished your message. You will then be presented with a screen:
Exit This will exit the personalise routine with no change
Save This will save your message and it will be displayed on power
up from now on.
USB
The dBbox2 has a mini USB connector for external power and to update the
firmware. Any USB outlet may be used to power the device, a computer or
even an iPhone mains adaptor using the correct mini USB lead.
Firmware updates will be available on our website, please see:
http://www.ctpsystems.co.uk/support.html
All new firmware may be downloaded from here along with instructions and
drivers.
Levels
All dB references in this manual relate to the following:
The dBbox2 ‘0dB’ output level is 0dBu, that is it generates 0.775 volts into a 10k ohm
load, the most common input impedance these days. Into a 600 ohm load it will be
approximately 0.3dB lower. The dBbox2 balanced analogue output impedance is 75
ohms. Inevitably the dBbox2 will sometimes be plugged into a source with phantom
power or something unpleasant on the line and the unit must be able to protect
itself. This protection comes at a price which includes a slightly higher output
impedance in order to overcome these possibilities, hence the variation.
If you have any firmware problems with your dBbox2 or you spot any incorrect
details in our manual please let us know so we can correct. Thank you.