OG-X-FR openGear Frame v1.0r1 20 www.aja.com
Chapter 6 – Reference Cabling
The OG-X-FR frame includes two independent looping reference BNCs (REF
1, REF 2) with connection to each card slot. Each REF BNC accepts a single
composite or tri-level sync signal to feed timing information to the openGear
cards installed in the frame.
GFC-8322 Overview
The GFC-8322 receives the analog reference signals driven to the REF 1 and REF 2
BNCs located on the rear panel of OG-X-FR frame. The GFC-8322 then distributes
both reference signals to each of the 20 slots in the frame.
Frame settings such as the frame IP address, frame name, and the frame serial
number are stored on the GFC-8322 via its Serial EEPROM.
Connecting a Video Reference Source
This feature distributes one or two reference signals to all cards in the OG-X-FR
frame. Cards which need an external reference use this master reference signal
in place of taking the signal from one of the card BNCs. This provides for ease of
installation and reduction in reference cabling requirements.
Connecting to a Reference Source
If only one reference type is required for the OG-X-FR frame, connect it to the REF
1 BNC. Two reference types enables you to use reference sources with a different
signal formats, each via a separate REF BNC.
For More Information on...
• on specifying the analog reference source for your openGear card, refer to its
user guide.
To connect a reference source to the OG-X-FR
1. Connect one end of a Belden cable to the REF 1 BNC on the OG-X-FR rear
panel.
2. Connect the other end of the same Belden cable to the applicable output
port on the external reference source device.
Figure 6. OG-X-FR — Reference Input Cabling
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3. If the reference is not being looped to another device, ensure that the REF 1
LOOP BNC is terminated with a 75ohm terminator.
4. Repeat steps 1-3 for REF 2 if a second reference source is required.
