Crystal Vision
Installation
5.6 Hardware configuration
This section deals with hardware jumper links to change channel gain and input/reference
termination.
ADCA412 card with OPAES 110 sub-module - jumper positions are shown in yellow
Note:
Pin 1 of a jumper header is indicated by a square pad on the underside of the PCB, in the
above diagram, pin 1 is also indicated by a small black circle.
Setting reference options
The ADCA412 output clock may be locked to AES reference, word clock, analogue video
(or black and burst) or left to run off a 48kHz internal clock using SW3-1 and SW3-2 as
previously explained.
AES reference input source and AES/Video termination selection is done using jumpers
as explained in the following table:
Link
Explanation
J1
1-2 (rearwards)
2-3 (forwards)
75 Ohm/Hi-Z termination for video syncs/word clock input
75 Ohm
high impedance
JL5,JL6
1-2 (forwards)
2-3 (rearwards)
AES reference input select
‘D connector’ or REF2 BNC (RM13 & RM14)
REF BNC (RM11) or REF1BNC (RM13 & RM14)
JL7
1-2 (forwards)
2-3 (rearwards)
AES reference input termination select
110 Ohm
75 Ohm
high impedance (Hi-Z)
No-jumper
Park jumper using just one pin for Hi-Z
Note:
Take care to place jumpers correctly. JL5, JL6 and JL7 all have pin 1 nearest the front of
the card. Jumper J1 has pin 1 facing the rear of the card.
ADCA412 User Manual R2.1
35
30 October 2018
