Comtech EF Data SDM-9000, Installation And Operation Manual

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Installation SDM-9000 Satellite Modem
2–6 Rev. 4
2.4.1 TX/IF Output (CP1)
The TX/IF output connection is a BNC connector used for the transmit IF signal. The
output impedance is 75
Ω
(50
Ω
optional). The output power level is +5 to -20 dBm.
In normal operation, the output is a modulated carrier with center frequency between 50
and 180 MHz.
2.4.2 RX/IF Input (CP2)
The RX/IF input connection is a BNC connector used for the receive IF signal. The input
impedance is 75
Ω
(50
Ω
optional). For normal operation, the desired carrier signal level
should be between -25 and -45 dBm.
The signal frequency of the receive RX/IF input is between 50 and 180 MHz.
2.4.3 Receive Data (CP3)
The Receive Data connection is a BNC connector used for the terrestrial data output
(G.703 interface only). The output impedance is 75
Ω
.
2.4.4 Send Data (CP4)
The Send Data connection is a BNC connector used for the terrestrial data input (G.703
interface only). The input impedance is 75
Ω
.
2.4.5 External Clock (CP5)
The External Clock connection is a BNC connector used for the external buffer clock
input (Ext Clk). The input impedance is 75
Ω
. This input is used for the G.703 interface
only. The external clock input for ECL/MIL-STD-188 interfaces is provided on the J8
connector.