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FCS P4DMS Excalibur Calibration Procedure

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P4DMS Excalibur Calibration Procedure (Main board FCS
P4DMS_EX_029_24)

Initial unity level setting:

1- Set Ratio, Threshold and Gain to zero and Blend to 100%
wet on both channels.
2- Set timing to RMS being sure no other timing switch is
engaged.
3- Make sure Feedback and External SC are not engaged.
4- Put compressor in SE I/O mode on both channels.
5- Apply a 0 dB / 1 kHz tone to the left TS input.
6- Measure the signal at the left TS output connector.
7- Adjust the Gain trim (R105) at the left VCA section so output
matches input.
8- Repeat for right channel using Gain trim (R101).

Balanced output unity level calibration:

1- Set Ratio, Threshold and Gain to zero on both channels.
2- Set timing to RMS being sure no other timing switch is
engaged.
3- Make sure Feedback and External SC are not engaged.
4- Make sure compressor is not in SE I/O mode.
5- Apply a +4 dB / 1 kHz tone to the left XLR input.
6- Measure the signal at the left XLR output connector.
7- Adjust the Gain trim at the left balanced I/O section located
in the left side of the compressor so output matches input.
The left gain trim is closest to the front panel.
8- Repeat for right channel using the gain trim closest to the
rear panel.

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Summary of Contents for FCS P4DMS Excalibur

  • Page 1 P4DMS Excalibur Calibration Procedure (Main board FCS P4DMS_EX_029_24) Initial unity level setting: 1- Set Ratio, Threshold and Gain to zero and Blend to 100% wet on both channels. 2- Set timing to RMS being sure no other timing switch is engaged.
  • Page 2 Detector calibration: 1- Make sure compressor is not linked by releasing the TPS Link switch 2- Connect a DMM to the Cal and Zero test points on the left channel of the main board. 3- Turn Ratio fully clockwise 4- 1 Apply a +4 dB / 1 kHz tone to the left XLR input. 5- Adjust the MONO Detector trim (R107) on the left channel until it reads -120 mV DC.
  • Page 3 16- Adjust the STEREO Detector trim (R102) on the right channel until it reads -120 mV DC on the left Cal and Zero test points. *Note that these STEREO detector adjustments are measured on the LEFT Cal and Zero testpoints since we are doing stereo calibration which is controlled by the left channel.*...

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