Grass Valley AMX-3981 2014 - Manual (Page 27)

GUIDE TO INSTALLATION AND OPERATION
AMX-3981 | 21
detected at the input.
[10-20 for 525; 7-22 for 625]
SD Duplicate: Select the line in which to embed a duplicate LTC in the SD-SDI output signal. Available only when SD
is detected at the input.
Insertion: In the case of 3H/HD signals, select OFF to disable insertion and pass incoming signals through
unchanged, or BOTH to embed both ATC-VITC and ATC-LTC from the LTC input on the rear panel into the output.
5.3.2 GPI tab
The AMX-3981 can both de-embed and embed GPI data
from/to timecode. As well, GPI inputs can be used to load
user presets on the AMX-3981 card, or reset loudness
measurements.
GPI status: the icons show the status of the three GPI
inputs on the rear panel.
Timecode Presence: Shows the time codes that are
available for embedding / de-embedding the GPI data.
Embed and De-embed are shown separately for SD
timecode, since they can be on different line numbers.
Load Presets: Use the pulldown lists to select what will
occur when each of the three rear-panel GPI inputs is
activated and released. Options are:
• Do nothing
• Load one of the five User Presets
• Reset the loudness measurement (see RESET on
page 49)
GPI Embedding / De-embedding: set up the embedding or
de-embedding of GPI data in the output and input data
streams. For each of the three GPIs:
Mode: use the pulldown list to select the operating mode for this GPI:
• OFF – the GPI is passed through untouched
• De-embed – a pre-defined user binary group bit from timecode within the incoming signal is de-embedded and
appears on the rear-panel GPI port
 When De-embed is selected, use the Bit pulldown list to select which of the user binary group bits (1-16) will
be extracted to this GPI.
• Embed – the data placed on the rear-panel GPI port is embedded to a pre-defined user binary group bit within
timecode in the outgoing data stream.
 When Embed is selected, use the Bit pulldown list to set which of the user binary group bits (1-16) will be
used to carry the GPI data.
GPI Embedding Config
SD Insertion Line (SD signals only): Select the line into which the GPI data will be embedded [10-20 for 525 and 7-22
for 625] provided DVITC time code is present.
Insertion (3G/HD signals only): select the ATC format [ATC-VITC, ATC-LTC or BOTH] into which the GPI data will be
embedded, provided the selected ATC format is present
Figure 5.9 Metadata Panel - GPI tab