User guide
User Guide 
7 
includes hardware for mounting to ground lug of CSI enclosures models 
ENC 10/12, ENC 12/14, or ENC 16/18). Spark gap wiring is straight 
through such that pin to pin continuity exists between the two modems. If 
the modems are installed entirely within a building, the transient spark gap 
protection is probably not needed.  
Figure 4. Installation of Spark Gap Protection 
Occasionally a customer needs to transmit data across longer or smaller gage 
wires or at higher speeds than can be done with the RAD modem powered by 
the SC105. RAD does sell a 9-volt power supply that will boost the signals 
enough to meet some of these more demanding applications. Please contact 
RAD for more information. 










