Specifications

Excalibur Multirate DAP Installation and Operation
3-16
Setting the Jumpers
The Excalibur Multirate DAP has six jumpers, labeled JS1 to JS6, that define the
functions of certain pins on the DTE connector for RS-232 operation. The dual interface
DAP also has a 12-position shunt jumper that sets the interface to either RS-232 or V.35.
The jumpers are located on the p.c. card. To access the jumpers, remove the DAP's top
cover by following these steps:
1. Loosen the two screws located on the top of the unit. These screws should be
loosened only to the point that they move freely up and down. Do not remove
them completely from the unit.
2. Lift the front end of the unit with one hand and insert your thumbnail into the slot
separating the front bezel and top half of the unit. (See Figure 3-7.)
3. Take a small flathead screwdriver in your free hand, and insert it behind one of
the front edge corner tabs at a 45 degree angle (as shown in Figure 3-7). Press
the tab outward, away from the unit, while pressing thumbnail upward until the
top cover disengages from the interlocking tab.
4. Repeat Step 3 at the remaining three corners of the unit, and remove the top
cover to expose the p.c. card.
2
1
45
o
45
o
Figure 3-7. Removing Top Cover