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Reference Cabling
The AG 4800X/XS 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 AG 4800X/XS 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 AG 4800X/XS 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 AG 4800X/XS 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 AG 4800X/XS
1.
Connect one end of a Belden cable to the
REF 1
BNC on the AG 4800X/XS rear panel.
2.
Connect the other end of the same Belden cable to the applicable output port on the external reference source
device.
PS1
!
1
REF 2
LOOP
Figure 6.1 AG 4800X/XS
— Reference Input
Cabling
To Reference Source 1
To Reference Source 2
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.
Looping the Reference Signals
Use this procedure if you have multiple frames that will switch simultaneously.
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!
OGX
-FR
