Grass Valley 8941 - Manual (Page 14)

14 8941 Instruction Manual
Module Alignment
EQ Warning Adjustment
A variable resistor, EQ WARN (R78,) allows the user to adjust the corre-
sponding cable length at which the EQ warning LED illuminates.
When R78 is turned counterclockwise, the EQ WARNING LED ( Figure 4
on page 11 ) will turn on at shorter cable lengths. The EQ warning LED
comes on at longer cable lengths when R78 is turned clockwise.
Follow the steps listed to adjust the EQ warning:
1. Connect a length of cable, approximately 20 meters longer than the
desired length at which the EQ warning LED should turn on, to the
input. The factory default is set for 300 meters. Terminate the
loop-through input with a 75
Ω termination.
2. Turn R78 clockwise until it stops. Refer to Figure 6 for the location of
R78.
3. Connect a 270 Mbps serial digital video signal to the selected cable.
Verify that a signal is present.
4. Turn R78 counterclockwise slowly until the EQ WARNING LED just
turns on. The module is now set.
Figure 6. EQ Warn, R78 Location
EQ WARN, R78