Comtech EF Data CDM-600/600L - Manual (Page 63)

CDM-600/600L Open Network Satellite Modem Revision 3
Rear Panel Connector Pinouts MN/CDM600L.IOM
3–3
3.2 IF Connections
CDM-600L: The J1 Rx IF connector is either a 50
Ω Type ‘N’ female or a 75Ω Type ‘F’ female.
The J2 Tx connector is a 50
Ω Type ‘N’ female.
There may be DC voltages present on the Type ‘N’ Rx and Tx IF connectors, up
to a maximum of 48 volts.
CDM-600: The J1 Rx and J2 Tx IF port connectors are both 50
Ω Type ‘BNC’ female. 75Ω cable
connectors (male) will have no problem mating with this 50
Ω type. The electrical impedance
presented by these connectors is controlled internally by an RF-switching arrangement. This
selection between 50
Ω and 75Ω is controlled either via the front panel menus, or via the remote
control bus.
3.2.1 J1 Rx IF Connectors
Connector Type Description Direction
CDM-600L: 50 Ω Type ‘N’
or 75
ΩType ‘F’
(Shown at top)
Rx IF signal, L- Band
In
CDM-600: 50 Ω BNC
(Shown at bottom)
Rx IF signal, 70/140 MHz band
3.2.2 J2 Tx IF Connectors
Connector Type Description Direction
CDM-600L: 50 Ω Type ‘N’
(Shown at top)
Tx IF signal, L- Band
Out
CDM-600: 50 Ω BNC
(Shown at bottom)
Tx IF signal, 70/140 MHz band
CA UTIO N