Comtech EF Data CST-5000 - Manual (Page 50)

Single Thread System Installation CST-5000 C-Band Satellite Terminal
2–22 Rev. 9
2.5.1 TX/IF Input (J1)
The TX/IF input is a TNC connector that receives the signal from the indoor unit. The
input impedance is 50
Ω , and the frequency is 70 MHz ± 18 MHz (optional 140 MHz
± 36 MHz).
The typical power level is from -43 to -19 dBm, depending on the configuration and
application.
2.5.2 TX/RF Output (J2)
The TX/RF output is a type N connector that sends the signal to the antenna. The output
impedance is 50
Ω . The output frequency range is from 5.845 to 6.425 GHz. The output
power level is dependent on the power amplifier ordered with the system.
Table 2-2 lists the maximum output power at the 1 dB compression point for each SSPA
available:
Table 2-2. SSPA Maximum Output Power
SSPA System Power at 1 dB
Compression Point
None +8 dBm
5W +37 dBm
10W +40 dBm
20W +43 dBm
40W +46 dBm
2.5.3 RX/IF Output (J3)
The RX/IF output is a TNC connector that sends the received signal to the indoor unit.
The output impedance is 50
Ω , and the frequency is 70 MHz ± 18 MHz (optional
140 MHz ± 36 MHz).
The 1 dB output compression point is +15 dBm.
Maximum output power operation is +9 dBm (-6 dB from 1 dB compression) to -
50 dBm, depending on system gain requirements.
The down converter has 26 to 47 dB of gain, and is adjustable by the customer from 0 to
21 dB of attenuation.
The typical system gain includes a 50 dB LNA, making the total system gain 76 to 97 dB.
Note: A 60 dB LNA is used only when extremely long cables are used from the LNA to
the down converter.