AJA FS2 Instruction Manual Page 132

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Analog Audio
Standard
Analog Audio Standard sets the Analog Audio Input and Output levels of the FS2 with
reference to full scale digital (0 dBFS). Selections range from consumer levels (+12
dBu) to SMPTE professional (+24 dBu).
SDI1 3G Detect This parameter configures 3G operation of the SDI 1 video input. The input can be
set for 1080p50/60 (single video), Dual Stream 3G SDI (two muxed videos), or Auto-
Detect whether the input is 1080p50/60 single or Dual Stream 3G video (requires
SMPTE Format ID to be present in the SDI Input).
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 FS2 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).
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.
Dual Stream 3G Mode Schematic
(3) Analog Audio
Standard
Description of Choices
+24 dBu (default)
+18 dBu
+15 dBu
+12 dBu
Select +24 dBu as the expected analog audio level.
Select +18 dBu as the expected analog audio level.
Select +15 dBu as the expected analog audio level.
Select +12 dBu as the expected analog audio level.
(Above settings correspond to maximum amplitude–0 dBFS)
(4) SDI1 3G Detect Selections Selection Descriptions
Auto Detect (default)
1080p50/60
Dual Stream
Automatically detects presence of 1080p50/60 or Dual
Stream video.
Configures the SDI1 input for 1080p50/60 (single) video.
Configures SDI 1 for Dual Stream 3G video (uses SDI 1 and
SDI 2 in Input Crosspoint matrix).
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