Comtech EF Data SDM-300A - Manual (Page 61)

SDM-300A Satellite Modem Revision 6
Installation/Upgrades MN/SDM300A.IOM
3–5
CAUTION
The mounting hardware must be installed to provide proper
grounding between the overhead interface PCB and the main PCB.
5. After completing the installation procedure, turn on the modem. Select the desired
modem option to use the overhead card.
Figure 3-2. Overhead Interface PCB Installation
Overhead PCB