AJA FS2 Manual - Manual (Page 55)

FS2 v2.1r1 www.aja.com 55
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).
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 9. 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 parameter 4 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 parameter 4 does not switch away
from the physical input.
In the Dual Stream setting, the FS2 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.
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.
4 SDI-3G Detect
Setting 5 SDI2 Input Protect
Setting 1 Video Input
Setting Resulting Input to
Crosspoint Matrix
Dual Video
Dual Stream
SDI1 SDI1-1
SDI2 (unused) SDI1-2
Normal
SDI1 SDI1-1
SDI2 SDI2
Single Video
Dual Stream
SDI1 SDI1
SDI2 SDI2
Normal
SDI1 SDI1
SDI2 SDI2