AJA R20CE, Руководство пользователя

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8
Installation
Typically, R20CE installation consists of the following:
1. disconnect power from the frame (remove line cord)
2. remove the FR1/FR2 front panel
3. install R20CE card module
4. apply external color black reference at the frame’s External Reference BNC
5. apply power to the frame by connecting a north american-style power cord from the
frame to mains power (90 to 260 VAC)
Instructions for removing the frame front door for module installation is discussed in the
FR1/FR2 User Manual.
External
Reference
Information
The R20CE expects the External Reference to be an NTSC or PAL analog Color Black
signal. The External Reference input can come from two different sources on the R20CE.
There are jumpers on the R20CE (see figure below) for selecting the external reference
source and for optionally terminating the selected reference source.
Looping Reference
The R20CE cell group of 9 BNCs contains two BNCs that can be used for a looping
reference connection. If this method is used, then the reference select setting on the R20CE
should be set to “LOOP” and the TERMINATION setting should be set to “OFF” (no
termination). Optionally, if you’re using only one of the looping reference BNCs, then the
TERMINATION setting should be set to “ON.”
Frame Reference
Alternatively, the R20CE installed in a FR1 or FR2 frame can use the frame’s frame reference
input BNC connector, which feeds an external reference video signal to all modules
installed in the frame. How the signal is distributed differs for the FR1 and FR2 frames.
Additionally, individual modules can usually be strapped as to whether external reference is
distributed from the frame or directly to BNCs on the module’s corresponding cell group
(the 9 BNCs on the rear panel).
FR1 Frame: the external reference signal is distributed passively to all frame modules.
If you wish to use the frame reference, the R20CE should have “FRAME”
reference selected on the module strapping, and one and only one card in the
frame should have “TERMINATION” set to “ON.” All other cards in the frame
should have TERMINATION set to “OFF.”
FR2 Frame: the external reference signal is distributed by an in-frame distribution
amplifier to all frame modules. This system terminates the Frame Reference
input BNC and buffers the signal to all slots. If using frame reference, the
R20CE installed in the FR2 frame should have “FRAME” set for reference select,
and all cards should have TERMINATION set to “OFF.”