RFL Electronics 9780 - Setting the J23 Programmable Jumpers

RFL 9780 RFL Electronics Inc.
April 8, 2003 20-8 (973) 334-3100
20.2 SETTING THE J23 PROGRAMMABLE JUMPERS
The J23 programmable jumpers are located on the rear side of the Interconnect Motherboard slightly to
the left of the J4 Output Filter Module connector. This can be seen in Figures 20-7, 20-8 and 20-9.
J23 is normally configured at the factory, however in some instances, may have to be reconfigured in the
field.
When the J23 jumpers are in the UP position, the output filter module “output” is tied to the “send”
input of the hybrid module. This eliminates the need for external wiring in certain RFL 9780
configurations.
When the J23 jumpers are in the DOWN position, the output filter module “output” is isolated from the
“send” input of the hybrid module. This would be the case when the RFL 9780 chassis has no hybrid
module installed.
Figure 20-5. J23 jumper position
J23 JUMPERS J23 JUMPERS
IN DOWN POSITION IN UP POSITION