V6402, V6404, V6406,V6408
and V6418 HD converters
28
Issue 6
3.2
Common Features to all Units
3.2.1
SDI Inputs
The SDI inputs must conform to either the SMPTE292M or SMPTE259M standards, which describe the Bit
Serial Digital Interface for HD and SD operation. If only one input is required then it should be connected
to SDI 1. Unused inputs can be left open, it is however recommended to terminate unused inputs with a
75
Ω
Terminator to improve noise immunity. Signals of different frame-rates, resolutions or even a mixture
of SD and HD standards can be connected to both Inputs at the same time, however only one of the two
inputs can be selected at a time. Note that switching between different standards is neither instant nor
glitch-free. This has to do with the necessity of the SDI de-serialiser hardware to lock to the newly
detected standard. Furthermore, in case of an SD-to-HD switch over (or vice versa), the FPGA on the
baseboard must be re-loaded. This process takes about 2 to 3 seconds.
The input selection is done on the
VIDEO
:
Source
menu.
3.2.2
SDI Reclocked & Buffered Output
This is always available, and is a reclocked version of either SDI 1 or SDI 2, depending on the source
selection. It is an unprocessed signal, i.e. neither synchronised nor converted.
3.2.3
SDI Main Outputs
The main synchronised/processed SDI output is available on two BNCs.
3.2.4
Video Reference
The external video reference is available for units with the Frame Synchroniser function; it can be either a
standard composite black and burst video signal, or a new style tri-level sync. The unit will automatically
detect which and extract the relevant timing information.
Note that on V6404, V6406, V6408 and V6418 units the SY function is optional. If it is not enabled, the
Video Reference Input has no function.
The reference is looped on the rear module so it can be daisy chained along several modules. For
accurate timing, this is not recommended. There is a termination on the I/O daughter module, which can
be switched in at the end of the chain. Care should be taken to ensure that each reference has only one
termination set.
The units can operate from either the external reference or use the selected SDI input. This is selected on
the
VIDEO
:
Ref Src
menu. When set to
Auto
, the external reference will be used if available; otherwise
the selected SDI input will be used as the reference.
3.2.5
Standard Detection
The units detect and report back the detected video standard and frame-rate of the selected SDI input and
that of the reference input. The detected standard can be seen in the
STATUS
menu under
I/P Std
and
Ref Std
.
V6406
V6408
V6418
V6404
V6402
