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Crystal Vision
Introduction
Crystal Vision
Problem solving
6 Problem solving
The front edge of the card provides LED indicators are provided to monitor
power rails, input presence/silence, input sample rate and local/remote mode.
In the following table the top row yel/green LEDs are for AES1 and the
bottom row yel/green LEDs are for AES2:
Name
LED Colour
Description
±5V and ± 18V
AES IN
Rem
Sil
48k, 44k, 32k
or Auto
Green
Red
Yellow
Yellow
Yellow
Illuminates when on-board power is OK
Illuminates when AES 1/2 input error exists
Illuminates when AES channel 1/2 has been last accessed by
remote control
Silence detected on input 1/2
Sampling Frequency (32, 44.1, or 48 kHz) or Automatic AES
Reference Mode (for 30-50 kHz)
Notes:
The ±18V supply takes a few seconds after power is initially applied before it is
enabled.
The actual time will vary from slot to slot, so that all of the PCBs will not enable their
±18V supply at the same moment.
Status is also available using an active control panel and Statesman control.
Please refer to the appropriate chapter for further information.
Basic fault finding guide
The Power OK LEDs are not illuminated
Check that the frame PSU is functioning – refer to the appropriate frame
manual for detailed information
There is no audio output
Check that valid AES inputs are present and that any cabling is intact
Check that the silence threshold delay is not set too low
Audio phase is incorrect
Check the audio phase inversion of the right hand channel
DACA214 User Manual R1.9
31
04 February 2019