Comtech EF Data SDM-2020 - Manual (Page 35)

SDM-2020 Satellite Modulator Revision 7
Installation MN/SDM2020M.IOM
3-5
3.2.2 D
ATA
I
NTERFACES
The data interface is a removable, plug-in module that provides a terrestrial connection to
the modulator. An interface consists of a Printed Circuit Board (PCB) attached to a
faceplate. The faceplate contains connectors appropriate for the interface type, and two
captive mounting screws.
Appendix C describe the various data interfaces. After a different interface type has been
installed, the modulator recognizes the change upon power up, and defaults to valid
parameters for the new interface.
CAUTION
To avoid damaging the modulator, always disconnect the power before
removing or installing a data interface.
Figure 3-3 is an example of a typical data interface.
J
3
P
A
R
A
L
L
EL
J4
SER
IA
L
J5
A
U
X
Figure 3-3. Typical Data Interface Module