Crystal Vision
Statesman operation
TANDEM-300 User Manual R1.2
28
14/02/2008
Using Presets
Up to sixteen setups may be stored and recalled from Statesman, the card edge control or
by external GPIs. Presets store board setup data including operating mode and option card
status. It is not possible to recall a preset if the operating mode or option card
configuration is different to those established when the preset was created. The presets are
currently numbered 0-15.
To store a preset proceed as follows:
•
Ensure ‘GPI controls preset recall’ is unchecked
•
Select appropriate preset with the Preset Number drop-down menu
•
Click on ‘CheckPreset’ to find an empty preset
•
Click on ‘Store’ to save setup data into the selected preset
To recall a preset proceed as follows
•
Ensure ‘GPI controls preset recall’ is unchecked
•
Select appropriate preset with the Preset Number drop-down menu
•
Click on ‘Recall’ to recall setup data from the selected preset
‘GPI controls preset recall’ should not be checked whilst presets are being created or
recalled by this menu to prevent inadvertent GPI operation. Enable ‘GPI controls preset
recall’ when finished if required.
SDI Crystal control
There is a single PLL module that may be inserted into the SDI output path (SDI 1 On) 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
Corrector' which sets the output SDI signal to the same mean frequency as the input, but
re-clocked by a crystal controlled Phase Locked Loop [PLL], to produce extremely low
jitter in the SDI output.
The PLL is situated in the input SDI path prior to processing, so all of the functions of
that side, as well as the SDI output, benefit.
