AJA FS1-X Manual - Manual (Page 59)

FS1-X v1.1 www.aja.com 59
In Auto Detect mode, the hardware looks for SMPTE 352 Payload ID ANC data on the
video inputs to determine whether there are two independent 1080i signals (Dual
Stream) or a single 1080p50/60 signal. If there is no SMPTE 352 data, the default is to
assume 1080p50/60 (single), but you can manually instruct the FS1-X to always assume
either 1080p50/60 or Dual Stream by selecting one of those choices.
In 1080p50/60 mode, the system always assumes that the input is a single 1080p50/60
signal (even if there is SMPTE 352 data to the contrary).
NOTE: The 50/60 text in the menu and description above actually refers to 50/59.94 video. The FS1-X
does not support 30 or 60 frame rate video.
In Dual Stream mode, the system always assumes (even if there is SMPTE 352 data to the
contrary) that the input consists of two multiplexed independent 3G video streams. The
signals are demuxed as shown.
Figure 12. Dual Stream 3G Mode Schematic
5 SDI2 Input Protect
This parameter allows you to protect Input SDI 2 from being taken by a Dual Stream
selection made with SDI1 3G Detect above.
In the Normal setting (default), the SDI 2 video signal always comes from the SDI 2
physical input. Choosing Auto Detect or Dual Stream in SDI1 3G Detect does not switch
away from the physical input.
In the Dual Stream setting, the FS1-X assumes both channels of Dual Stream 3G video are
muxed onto a single wire at the SDI1 input. The SDI 2 video signal is then taken internally
from the SDI 1 Stream 2 signal instead of the SDI2 In connector.
The following table shows the selections and their results. In the table, SDI1-1 and SDI1-2
are the two muxed streams entering the SDI1 Input.
3G
DEMUX
SDI 1-1
SDI 1
SDI 2
SDI 1-2
Dual Stream 3G
SDI Video Input SDI 1
INPUT
SDI 2
INPUT
TO INPUT
CROSSPOINT
MATRIX
Switch controlled by SDI 1 3G Detect and
SDI2 Input Protect menus
Similar processing is available for Fiber SDI Input
Normal (default)
Dual Stream SDI2 cannot be used by Dual Stream 3G SDI video on SDI Input 1.
Allows SDI2 to be used by a Dual Stream 3G SDI input present on
SDI 1.
SDI-3G Detect Setting
SDI2 Input Protect
Setting 1 Video Input
Setting Resulting Input to
Crosspoint Matrix
(Dual Video signal)
Dual Stream setting, or
Auto Detect with ANC Dual Stream data Dual Stream
SDI1 SDI1-1
SDI2 (unused) SDI1-2
Normal
SDI1 SDI1-1
SDI2 SDI2