Daktronics DF-12xx - Manual (Page 19)

Electrical Installation 2-7
3. A current-loop j-box is often mounted at the base of the display pole in
case of problems with communication though the radio network.
4. For additional connection and operation information see ED13894:
DataMaster Radio Installation Manual
Modem (Indirect)
Reference Drawings:
Modem Installation; 4 col MASC Drvr. Enc..................Drawing A-177039
System Riser Diagram, Modem Setup ........................Drawing A-200552
A modem controlled display uses a DataMaster controller connected to a modem/j-
box, to call a second modem in the Gas Price display. The DataMaster hand-held
controller will receive its power from the j-box. A wall pack transformer powers the
j-box. The display layout is shown in
Figure 6 and Drawing A-200552.
Figure 5: Direct Current Loop Connection