Comtech EF Data SDM-2020, Installation And Operation Manual

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SDM-2020 Satellite Demodulator Installation
Rev. 3 2–7
Table 2-1. Rear Panel Connectors
Name Ref. Desig. Type Function
Remote J1 9-pin D, Female Remote control (M&C)
Fault J2 9-pin D, Female Relay Faults
Monitor J21 9 pin D, Female Performance Monitor
IF Input (Single-Channel)
(see Note 1)
J23 Type F, Female RX IF input, LNB power out.
IF Input (4 Input)
(see Note 2)
J23, J24,
J25, J26
Type F, Female RX IF Input LNB power out
Prime Power None Standard AC Power Input
GND None #10-32 Stud Chassis Ground
Data Interface Connectors See Appendix A
Notes:
1. Single RX IF input is for earlier L-Band units and all 70/140 MHz demodulators. LNB
power is available only for L-Band.
2. The 4-channel input IF is only available for L-Band.
2.3.1 Connector Pinout Definitions
Pinout “TYPE” is defined to described signal direction for each pin. The signal direction
is relative to the connector.
Definitions for Pinout Types
I (Input) A signal goes into the connector.
O (Output) A signal exits the connector.
I/O (Input/Output) A signal both enters and exits the connector on the specified pin.
GND (Ground) The pin is defined as being connected to a power supply ground or return.
N/A (Not Assigned) The pin is not assigned within the system but may be routed to other connectors.
Usually defines spare pins.
N/C (No Connect) The pin is not connected and is not used within the system.
N/U (Not Used) The pin is not used but is routed and has other uses within the system.
FC (Form C) The pin is connected to a “Form C” relay.