360 Systems MAXX-2400SD - Manual (Page 126)

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Page 126 MAXX 2400 Owners Manual
Calibration Procedure
1. Position the jumper block J5 and J6 for Channel 1 output to obtain an analog output.
2. Play the test clip titled zTONE present on the Image Server disk. This stereo clip is
recorded at a level equivalent to a +4 dBu output level.
3. While observing the output level of audio Channel 1 Left on a calibrated meter, adjust
trimmer R71 until a level of exactly +4.00 dBu is obtained.
4. Repeat this procedure for audio Channel 1 Right, while adjusting trimmer R86, and also for
each subsequent audio channel using its associated trim pot.
Having established accurate gain settings for all analog audio outputs in steps 1 through 3 above,
calibrate the Image Server’s input gain as follows:
5. Using the graphic user interface, place server Channel 1 in the E-E mode, so that an input
signal will appear at its output.
6. While observing the output level of audio Channel 1-L, apply a 1 kHz sine wave from the
audio generator to audio Input 1-L.*
7. Adjust input trimmer R10 until a level of exactly +4.00 dBu is obtained at the output of
Channel 1L.
8. Repeat this procedure for audio Input 1-R, making the gain adjustment with input trimmer
R25.
The preceding steps establish a gain of unity through the server.
* In the absence of a generator, use the calibrated outputs of Channel 2 playing zTONE to
feed the inputs.