Description; General - pro bel V6402 HD User Manual

V6402, V6404, V6406, V6408
and V6418 HD converters
1

DESCRIPTION

The modules described in this manual form part of the Vistek 1600 range of interface products. Although
they process High Definition (HD) video signals, they are fully compatible with all other products in the
range in terms of their form factor, power supply requirements and control interface. Each is a 3U high
card that can be fitted into a V1606 rack or a V6011 '1-Box', from which it obtains its power and control. A
passive rear module is required for all signal interconnections.
This manual covers the following modules:
V6402 HD Frame Synchroniser
V6404 HD Down Converter
V6406 HD Up Converter
V6408 HD Cross Converter
V6418 HD Converter
These modules are based on a common platform, with a variety of Add-Ons available:
VP: Video Proc Amp
SY: Frame Synchroniser (inherent for V6402)
FD: Field/Frame Delay (requires the SY option to be enabled)
CP: Closed Captioning
AH: Audio Handling
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General

The V6402 HD Frame Synchroniser re-times an HD or SD SDI signal to an external reference signal and
allows the operator to offset the output from the reference by a set amount both horizontally and vertically.
The horizontal adjustment is in single clock steps over a whole line and the vertical adjustment is in lines
with a range of ±255 lines. The Frame Synchroniser will occasionally repeat a frame or drop a frame in
order to keep pace with the external reference applied. Ancillary data in the horizontal and vertical
blanking intervals - such as embedded Audio - remain unaltered, but can be also forced to be blanked. A
built-in Test Pattern Generator (TPG) offers a choice of commonly used test patterns for system integrity
tests. Without an external reference, the unit can operate as an adjustable delay module, allowing the
operator to set the input to output delay pixel accurate from a minimum delay of roughly one video line up
to an arbitrary number of fields/frames, provided that the Field/Frame Delay option is enabled. The unit
automatically detects the input signal standard and operates accordingly. Available options for the V6402
are: VP and FD.
The V6404 HD Down Converter takes an HD input signal and converts it to a Standard Definition (SD)
output at the same frame rate as the input. While the unit handles all the interlacing, filtering and scaling
required, it does not change the frame rate. Therefore, both the input and output standards must have the
same frame rate. The unit automatically detects the input signal standard and sets the output standard,
i.e. 525 lines @ 59.94Hz or 625 lines @ 50Hz, accordingly. The operator can select between different
aspect ratios (e.g. anamorphic, letterbox, centre-cutout). If the detected input standard is SD, the unit
switches automatically into a bypass mode where it maintains the same processing delay that is normally
introduced by the down-conversion process. If the module comes with the Audio Handling (AH) option
fitted, embedded Audio information will be retained by de-embedding it in the HD domain and re-
embedding it in the SD domain. Available options for the V6404 are: VP, SY, FD, CP and AH.
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