Waves PuigChild User Manual - page 13
13
Input/Output Calibration Controls
The calibration controls are used to adjust the signal output that runs from your analog device
to the PuigChild’s input, and the analog output of the PuigChild to the next unit in the signal
chain, allowing you the maximum available headroom.
Input Calibration
Set your analog device to its maximum output level and set the input rotary switches on the
PuigChild front panel to unity gain. Then, adjust the input calibration so that your peak signals
are between -6 and 0 dBFS on the input meters.
Output Calibration
To adjust the PuigChild’s output, set the calibration control so that the input level on your
analog device that follows the PuigChild in the signal chain does not exceed unity gain.
Calibration Options
Input: + 9, 12, 15, 18, 20, 24 dBu
Output: + 9, 12, 15, 18, 20, 24 dBu
Rear Panel Sync & Word Clock Connections
The PuigChild can be connected to an external word clock source
(using a BNC connection) or you can use its internal clock. An external
word clock is utilized for applications that require synchronization
with other digital audio devices. The internal clock setting is selected
on the front panel only when using the PuigChild’s analog inputs.
The Termination on/off switch enables the PuigChild to perform
wordlength impedance-matching when multiple word clock
sources are chained together. Correct termination of word clock
inputs is crucial for a stable clock configuration. As the frequency
of a word clock signal increases, termination requirements become
more critical for precise transmission. In order to ensure the integrity of the clock waveform,
each connection should be terminated by a 75 ohm load impedance. Over-termination (load
impedance lower than 75 ohms) will attenuate the signal excessively, while under-termination
(load impedance greater than 75 ohms) introduces overshoot and other waveform distortions.
Both conditions compromise clock accuracy.