AJA R20CE User Manual

Page 9

AJA R20CE 10-bit Encoder User Manual

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.”

Reference Select and Termination Configuration

Output Timing
Adjustment (With
Model FSG
Framesync/
Genlock Option

The following procedure provides instructions for output timing adjustment of the
R20CE when used with the model FSG FRAMESYNC/GENLOCK option.

The R20CE has three levels of output timing adjustment:

•

advance or delay by lines

•

advance or delay by pixels (with l/4 pixel resolution)

•

fine timing adjust (+/- 40 nanoseconds)

There are two modes of timing adjustment:

•

Genlock

•

Delay

If the R20CE detects an external reference, it then enters Genlock mode. If no external
reference is detected, the board enters Delay mode. In Genlock mode, the R20CE
output genlocks to the external reference. The board can be set to Delay mode without
removing the external reference by lifting the "REFERENCE SELECT" jumper (J3).

Genlock Mode

Perform function 1 in Bank 1 "

SET DEFAULT DELAY.

" This brings the output timing

close to the reference's timing.

Perform function 3 in Bank 1 "

SET PIXEL DELAY.

" This will allow adjustment to

within l/4 pixel of reference.

Adjust the "

FINE TIMING ADJUST

" control on the front of the R20CE board for

precise exact timing (refer to photo provided).

Reference Strapping

Front of Card

Field (J3)

OFF

FRAME

LOOP

Reference Select:
FRAME = Selects Aux BNC on Frame
LOOP = Selects Reference Loop BNC
on Card Module Connectors

Termination:
OFF = No Termination
ON = 75 Ohm Internal Termination

Jumpers shown with Reference Select set to “LOOP”

and Termination set to “OFF”