Grass Valley 8941 - Manual (Page 10)

10 8941 Instruction Manual
Installation
Cabling
Cabling to and from the module is done at the back of the Gecko 8900 frame
Refer to
Figure 3 . At the back of every hard copy 8941 manual are overlay
cards that can be placed over the rear connectors to identify the specific
8941 connector functions.
Loop-through Input
Connect an 270 Mb/s digital input source to one of the loop-through input
connectors, J9 or J10. This loop-through input must be terminated.
The recommended termination for serial digital signals is CONARE
BCP-TA (or equivalent). The destination equipment should have an input
impedance of 75
Ω unless it has loop-through inputs, in which case the
loop-through inputs must be terminated into 75 Ω .
Note It is recommended that no more than five digital modules be looped, using
cables less than two meters in length, and with an input cable less than 200
meters of Belden 8281 (or equivalent). Performance of looping inputs to
equipment other than 8900 modules has not been verified; therefore, care
should be taken if this is required.
Outputs
There are eight outputs for the 8941 module:
• Analog outputs – J1 through J4
• Inverting digital outputs – J5 and J6
• Non-inverting digital outputs – J7 and J8
Figure 3. 8941 Input, Output and GPI Connectors
J2
J4
J6
J8
J9 J10
IN
Digital Output Non-inverted
DAx
O
U
T
J3
J5
J7
J2 J1
J4
J6
J8
8109-02r1
Loop-through
Digital video Input
Analog Output
Analog Output
Digital Output Inverted
Analog Output
Analog Output
Digital Output Inverted
Digital Output Non-inverted