Radyne OM20 Specifications download pdf (Page 74)

OM20 Universal Outdoor Modem Rear Panel Interfaces

MN-OM20– Revision 5 5–8

5.1.9 SD (J10) (Optional)

Based on unit configuration, this connector is used for either G.703 Unbalanced Transmit Send

Data (Drop Data In) or for ASI data in depending on the optional interface ordered. The

connector is a 75-Ohm Female BNC Connector.

5.1.10 RD (J11) (Optional)

Based on unit configuration, this connector is used for either G.703 Unbalanced Receive Data

(Insert Data Out), or for ASI data out depending on the optional interface ordered. The connector

is a 75-Ohm Female BNC Connector.

5.1.11 LED Indicators

There are two (2) Light Emitting Diodes (LED’S) on the front of the unit, Power and Alarm.

Whenever proper AC Power is supplied to the unit and the power supply is functioning normally,

this LED will be Green. If a Fault condition exists within the Power subsystem, this LED will be

RED indicating that service is required.

5.1.12 G.703 Balanced – Connections are available via the J3 connector.

Refer to Table 5.4a.

5.1.13 EXT Reference J12

The External Clock connector is optional and must be requested at time of order. This is not

actually a clock, but does have some clocking implications. When the external reference is used,

the master oscillator within the modem is locked to the external reference, and the internal

accuracy and stability of the unit assumes that of the External Reference. Therefore, not only are

the transmit frequencies locked to the external reference, but the modem’s internal SCT Oscillator

is locked to the external reference as well.

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Radyne OM20 Specifications Page 74