Comtech EF Data SDM-300L - Manual (Page 40)

SDM-300L Satellite Modem Installation
Rev. 2 2–19
External Reference (CP2)
CP2 is a BNC connector for an EXT REF. The input impedance is 75
Ω
. For normal
operation, the desired carrier signal level is
≥
0 dB.
EXT REF frequencies are EXT 1, EXT 5, EXT 10, and EXT 20 MHz.
RF Input Connector (CP3)
CP3 is a Type N connector for an RX IF signal. The input impedance is 75
Ω
(Optional:
50
Ω
). And the input return loss is
≥
10 dB from 950 to 1750 MHz.
AC Power Connector
A standard, detachable, non-locking, 3-prong power cord (IEC plug) supplies the
Alternating Current (AC) power to the modem. Observe the following:
Input Power 55W maximum, 40W typical
Input Voltage 90 to 132 or 175 to 264 VAC
Unit switches ranges automatically
Connector Type I.E.C
Fuse Protection 1A slo-blo
Line and neutral fusing
5 mm type fuses
Ground Connector (GND)
A #10-32 stud on the rear panel of the modem is used for connecting a common chassis
ground among all equipment.
Note: The AC power connector provides the safety ground.