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CTP Systems dBbox2 Manual

Version 3 firmware
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dBbox2
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Summary of Contents for CTP Systems dBbox2

  • Page 1 3 firmware...
  • Page 2 The battery symbol on the top right of the display shows if you have enough battery power for the current function. A solid block is a full battery. The dBbox2 has an intelligent battery management system that switches off all electronics not in use for a particular test.
  • Page 3 For example: to listen to a phantom powered microphone on the internal loudspeaker: Switch on the dBbox2, you are now on the top menu. Use the up/down keys to highlight ‘Input”. Press the > key to move the highlighter to the right of ‘Input’. Press...

  • Page 4: Audio Inputs

    Audio Inputs Access to the various facilities will be described as for example: Input> Analogue Gain > Where analogue input is selected and we are dealing with the gain settings. Analogue Inputs, metering and monitoring On the analogue input page it is possible to listen to and meter mono or stereo analogue signals using PPM or VU metering (as selected in Setup) with a stereo phase meter and, for testing microphones, to apply phantom power.
  • Page 5 Input> AES BNC Errors type> loop or sticky When set to “Loop” any errors are continuously monitored so a brief error may not be noticed. When set to “sticky” an error once set will be continuously displayed even if the signal has recovered from the error.

  • Page 6: Audio Output Menu

    Audio Outputs All available output signals are the same for analogue, AES and SPDIF signals so will be described together. Analogue signals go up to 12dBu and digital signals up to 0dBFS. Output> Analogue Output> AES BNC Output> AES XLR Output>...
  • Page 7 Output> AES BNC Tone Level> Sets the output level of the tone from -60dB to +12dB in 1dB steps. Settings will be retained in memory. Output> AES BNC Tone Frequency> Sets the frequency of the tone in third octave steps from 50Hz to 20kHz. Output>...

  • Page 8: Signal Conversion

    4 Wire Box This feature is analogue only. The dBbox2 will act as a four wire box using the internal microphone and speaker or headphones. Listen to incoming audio and adjust the volume using Vol- and Vol+. Up. If the speaker is in use it will cut on talk to prevent feedback, the headphones will not.
  • Page 9 In/Out/FX Output> Available outputs Analogue, AES BNC, AES XLR and SPDIF In/Out/FX Gain> Gain range will be +70dB to -10dB when on analogue input (to allow for microphone levels) and +12dB to -10dB when on digital inputs. In/Out/FX Phantm> Phantom power on/off. This item may only be changed in on analogue input, else it will Be forced to off.
  • Page 10 MIDI Analyse Format> Selects MIDI data to be displayed in hexadecimal or decimal. MIDI Analyse Clear> Clears the screen MIDI Analyse Oneshot> When the cursor is put over ‘oneshot’ the word will change to ‘Waiting’. When the next MIDI message is received it will displayed on the screen and all following messages will be ignored.
  • Page 11 More The more menu enables selection of the Timecode reader, Timecode generator, Tone Loop, 2Wire listen and Cable Test. More/Read Timecode This option reads linear timecode at 24, 25, 29.97 and 30 frames per second using the Ana in L XLR. The timecode is also output through the Ana XLR outputs so it may be used as an ‘in line’...
  • Page 12 More Generate Timecode Set Starts the timecode at a pre-defined time. Select ‘Set’ then the cursor will move to tens of hours. Press the up or down key to adjust tens of hours. Then press the right arrow to move to hour units and adjust using up/down. The cursor may be moved between columns as required with the left and right keys.
  • Page 13 More/ 2W Listen This will listen to and meter unbalanced audio inputs on pins 2 and 3 of the left XLR input with pin 1 as common earth. This includes all two wire formats. More 2W listen Listen Select to listen to channel 1 (XLR pin 2), Channel 2 (XLR pin 3) or both.
  • Page 14 More/More/Setup This page enables the user to set metering preferences, adjust the display contrast and to personalize the dBbox2 so when switched on it will display, for example, your name and phone number. More Setup Ana_meter> Select all analogue metering to PPM or VU Meter scale and ballistics.
  • Page 15 40 characters on the display which will be displayed when the dBbox2 is switched on. A typical use of this would be a “this unit belongs to” message. It is important to note that when this facility has been used it cannot be changed without return of the dBbox2 to CTP Systems.
  • Page 16 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.
  • Page 17 +-0.2dB 50Hz – 15kHz Ref. 0dBu accurate to within +-0.4dB 50Hz – 20kHz Normally within +-0.1dB at 1kHz. Phantom power measurement- +- 1 volt. dBbox2 firmware is the intellectual property and copyright of CTP Systems in the UK ©2014-2020...