Radyne OM20 Specifications download pdf (Page 63)

DMD1050 Satellite Modem Board Rear Panel Interface

4.2 Compact Flash (J9)

The compact flash slot is located on the right side as viewed from the rear of the unit. A 256 Mbit

flash memory card stores all the modem M&C and operational data. It must be present when the

modem is operating.

4.3 Power Input (J7)

The Input DC Power for the modem board requires +21 to +24.5 Volts DC. Manufacturer part

number for this connector is referenced in Appendix E. Refer to Table 4-1 for pin out

descriptions.

Table 4-1 DC Input Power Ports (J7)

Pin No. Signal Name Signal

1 Ground GND

2 Ground GND

3 24 Volts DC ---

4 24 Volts DC ---

Table 4-1. Power Input Connector (J7)

4.4 Chassis Connections (Standard)

4.4.1 EXT REF (J8)

The External Reference Port is a 50 Ohm Female SMA Connector and will accept the following

frequencies: 1.0, 1.544, 2.0, 2.048, 5.0, and 10.0 MHz).

Input Level: 0.1 Vp-p to 5 Vp-p (Sine or Square wave)

4.4.2 TX L-Band IF (J1)

The Transmit IF Output Port is a 50 Ohm SMA Female Connector that can be used for L-Band

IF. The power level is programmable from 0 to -25 dBm, in 0.1 dBm steps. The IF Frequency

can be programmed to 950 – 2050 MHz, in 1 Hz Steps.

4.4.3 RX L-Band IF (J2)

The Receive IF Input Port is a 50 Ohm SMA Female Connector that can be used for L-Band IF.

The IF Frequency can be programmed from 950 to 2050 MHz in 1 Hz Steps.

MN-DMD1050 4–5

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Radyne OM20 Specifications Page 63