Crystal Vision
Introduction
Crystal Vision
Specification
7 Specification
Inputs
Audio:
2 x 20 bit stereo pairs. AES3 110ohm or HiZ
(balanced) D Type, or AES3-id (unbalanced) 75
Ohm BNC. Set by on-board links.
Input sampling
frequency:
Crystal re-clocking for 48 kHz sample rate, for
minimum THD and maximum AES input signal
jitter rejection. From 30 kHz to 50 kHz in ‘Auto’
Mode. Automatic locking with no reference
required. The 2 AES channels are independent
and may be at different sampling frequencies.
Outputs
Audio:
2 analogue stereo pairs or 4 mono channels, 20
bit quantising A to Ds, Low output impedance
(66 Ohm) balanced.
Performance
Noise:
< -100dB wrt 0dBFS AES/EBU input.
THD+N:
<0.0025% at +18 dBu or +24 dBu analogue
output, 48 kHz Crystal re- clocking mode.
Output range:
Min +12 dBu, Max +28 dBu output swing with
THD <0.005%. Default level: 0dBFS = +18dBu
or +24dBu by on-board link.
Monitoring
2 x miniature front mounted audio jacks for
stereo audio analogue output monitoring. Also
available on rear connector.
Shuffle modes
Channels may be swapped so that AES 1 feeds
Stereo Output 2 and AES 2 feeds Stereo Output
1.
Both output stages may be assigned to either
AES 1 or AES 2 (DUAL mode).
The phase of the right hand output of Stereo
Output 1
OR
Stereo Output 2 may be inverted.
Silence threshold
delay
Silence threshold delay for both sides is pre-
settable for the amount of time a signal is
allowed to remain below –50dB wrt Full Scale
before a silence error is flagged. Values start at
1.5 seconds, 8 seconds and then in increments of
8 seconds to 120 seconds.
GPIs
Four GPIs are available for external control of
AUTO/Xtal mode per channel, Dual/Single
mode and Channel Swap.
Two GPIs are available to provide alarm
DACA214 User Manual R1.9
33
04 February 2019