
GUIDE TO INSTALLATION AND OPERATION
8
| HDA-1941/51 & HDA-3941/51
3G-HD-SD IN – serial digital video inputs
Connect a serial digital video signal, conforming to the SMPTE 424M for 3 Gbps input signals, the SMPTE 292M
standard for HD input signals or SMPTE 259M standard for SD input signals, to the BNC labeled
3G-HD-SD IN
. DVB-
ASI is also supported. The HDA will automatically switch to the detected video line format.
3G-HDSD OUT – serial digital video outputs
The HDA provides multiple 3G/HD/SD SDI video outputs, labeled
3G
-
HD-SD OUT 1
,
2
, etc. The SDI video signal
conforms to the SMPTE 424M, SMPTE 292M or SMPTE 259M-C standard. All outputs are DVB-ASI compatible.
2.4 Bypass Relay
Rear panels with an integrated bypass relay or relays are identified by a –R designation. The relays activate
automatically if the card loses power, or is removed from the frame.
When activated, the relays connect the 3G-HD-SD SDI input directly to 3G-HD-SD SDI output
1
, ensuring that the
signal is available downstream.
When the card is re-activated, the relay disengages.