VISTEK V6333E/D & V6333Q/D
hd/sd sdi digital audio multiplexer
12
Issue 5
Note:
1. It is possible to select to embed on a group that is already present. This could result in incorrectly
embedded audio. To help identify this situation a banner message is displayed if a group conflict has
occurred. See Ancillary Data Blanking and Input Group Deletion on section 0 for more details.
2. All channels in a group must be co-timed, it is left to the user to ensure this. If Input A and B are
selected to be embedded on the same group but are from different sources and therefore asynchronous
to each other the user can either select one to be the reference to resample the other, or both can be
resample and the group made video synchronous.
3.5.3
Reference Selection & Sample Rate Converter Bypass
Many installations have difficulty with embedded audio, which can often be traced to the frequency and
phase relationship between the video and AES audio. Unlike many SDI multiplexers the V6333 does not
require the signals to be synchronous. In fact it is quite possible for the SDI video and the two multiplexed
audio data streams to have no defined relationship.
To assist in operational installation the V6333 can be used to resample the audio at 48kHz synchronised to
various reference signals. This may help if the audio is to be de-multiplexed at a later stage by another
manufacturer’s de-multiplexer. The reference source may be either an AES signal or the video input.
The front panel reference selection is used as follows:
Input pair reference selection using input pair AB as an example,
MENU Option
Description
AB Ref : Sys Ref
A and B are re-sampled using the selected system reference as a reference.
AB Ref : AB Ref.A
A bypasses the re-sampling stage and B is re-sampled using A as a reference
AB Ref : AB Ref.B
B bypasses the re-sampling stage and A is re-sampled using B as a reference
AB Ref : Async
A and B bypass the re-sampling stage.
Sample rate converter (SRC) bypass is achieved by setting the input’s reference to
Async
, or making the
input to be SRC bypassed a reference for other inputs.
The System Reference is selected in
MAIN : Sys Ref
where the reference can be selected between any
of the 8 AES inputs (
Ref IPA/B/C/D/E/F/G/H
), the input video (
Ref. Vid
), and re-sampler bypass
(
Async
).
3.6
Status Menu
3.6.1
Variant
Displays the module type. This will be the same as the module type displayed on the front panel display on
power up.
V6333Q/D
V6333E/D.
3.6.2
Options
Indicates the password protected options.
4 input
8 input
