Sphynx User Manual
© 2000 Merging Technologies
17
Chapter 6 - Power-Up
Once all of the needed audio and power connections have been made, the Sphynx can be safely powered up.
Power-up Sequence
When the Sphynx is powered up, the initialization sequence progress is displayed on the
REMOTE
,
INT
and
ODI
LEDs.
If the initialization sequence stops with one of those LEDs blinking, it indicates that the Sphynx is not working
properly.
In this case, please contact Merging.
Display of Sphynx Configuration
After a normal initialization sequence, which should takes around 4 seconds, or after having pressed the M
ONITOR
SELECT
button for more than 2s, the M
ONITOR
LEDs will display the current Sphynx configuration for 5 seconds:
Each installed input or output module will light its corresponding LED.
The CPU board version is displayed on the
X
1 and
X
2 LEDs (see details in Appendix 3).
The firmware version is displayed on the
I
NPUT
L
EVEL
M
ETERS
LEDs (see details in Appendix 3).
Note that upon power-up, the Sphynx front panel controls are restored to the last settings used before power down.
I/O Modules Placement Mismatch
Please note that if an I/O module is incorrectly inserted into an I/O slot, the corresponding M
ONITOR
LED on the will
flash to indicate the mismatch, and the initialization sequence will stop.
This will occur if an input module is inserted into an output slot, or if an output module is inserted into an input slot.
In this case switch the Sphynx OFF, unplug the power cable, open the Sphynx and check the placement of all
installed modules.
Analog Modules Calibration
In order to guarantee optimum specifications from some of the analog audio converters used in the Sphynx (mainly
the 96kHz analog input modules), there is a "warm-up" time of about 30 seconds after power is switched on before
the software conducts its final calibration procedure. During this "warm-up" time, input signals are muted. It is
therefore recommended to wait for this initialization phase to be complete before attempting to use the Sphynx.
Note: As those thirty seconds were found not to be a sufficient warm-up time for the converters used in Sphynx
modules to yet be at full thermal equilibrium, the Sphynx firmware automatically launches a second re-calibration
process after about 5 minutes. In order to avoid disrupting any recording that may be occurring at that time, the
software checks that all audio levels on input modules are consistently below -60 dB for a minimum duration of 2
seconds before initiating this re-calibration process during which all input audio is fully muted. This second re-
calibration process gives an additional improvement in the signal/noise specs of about 2-3 dB.
The calibration can still be manually initiated at any time by pushing on the M
ONITOR SELECT
button while
simultaneously pushing once the S
AMPLE
R
ATE SELECT
button before releasing the M
ONITOR SELECT
button.
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