Crystal Vision
Statesman operation in mode 1
TANDEM-200 User Manual R1.7
32
13/02/2008
Audio Monitoring
A powerful 16-source stereo monitoring bus provides audio monitoring at the card-edge
headphone socket and rear connector.
TANDEM-200 audio monitoring (mode 1)
A fully selectable analogue monitoring output is fed to a miniature stereo jack socket at
the card edge. Select any valid stereo signal to be monitored with the monitoring drop-
down list.
The RM04 and frame rear connector can also receive the same user-selectable analogue
monitoring signal as the headphone socket or an automatically assigned AES monitor
output. The AES output can be routed via external devices to further process TANDEM
audio which may then be re-entered into digital audio input cards in the same or another
TANDEM card.
TANDEM-200 switches the AES monitor bus to monitor de-embedder outputs when de-
embedders are on and input card outputs when de-embedders are off. If there are no input
cards then digital silence will be output when de-embedders are off.
See section 10.3 for further discussion of audio monitoring and pinout details.
SDI Crystal control
There is a single PLL module that may be inserted into either SDI 1 only, SDI 2 only, or
left out of circuit (OFF).
The SDI signal accumulates an ever-increasing amount of jitter as it progresses through
an SDI installation, and as it passes through most equipment in its path. To minimize this
effect, TANDEM has an SDI crystal controlled re-clocker. This is a form of ‘Time Base
