Crystal Vision
Specification
TANDEM 3G User Manual R1.4
60
23/04/2012
Audio Delay
Adjustable audio delay of up to 80ms on each channel. Delay is either on or off
for any given channel
Store presets and control via the card, frame active front panel, remote panel
and Statesman
Delay through
board
Selectable two frame video delay can be used to compensate for audio delays
from Dolby E encoding or decoding.
Audio Replace
Routing of input audio together with audio or Dolby E from up to four de-
embedded groups present on video input to any channel of up to four output
embedder groups. HANC cleaning means that there is no remnant of the
original version of old groups. If group 1 is replaced there is not an old group 1
with the “mark for deletion” flag set. Instead there is just the new modified
group 1.
Audio Processing
Gain level adjustment on each channel b18dB and -18dB in 0.1dB
steps with 0dB calibration
Mute
Stereo to mono conversion
Audio protection
Full support for data recovery using SMPTE 299M error correction codes
A variety of sophisticated techniques are employed to protect and minimise the
effects of cuts to untimed and asynchronous SDI
Auxiliary data
Auxiliary data passed unless set to blank
Status monitoring
LEDs
Front of card edge LED indicators to indicate:
PSU rails present
SDI input HD/SD
Input audio groups present
Gains not calibrated
GPI Out 6 active
GPI inputs
Number and type:
4 x GPI inputs. Recall of presets
Active pull to ground, pulled up to +5V through 7kOhm
GPI outputs
Number and type:
1 x GPI output, selectable from loss of input, audio missing, audio channel
silence.
Electrically: Open collector transistors 30V, 270Ohm current limit resistors.
Pulled up to +5V through 7kOhm
Input fail output
Type:
Dark Blue
Control
Local
Intuitive board edge interface with two select buttons, shaft encoder and 10
character alphanumeric display
