Comtech EF Data KST-12025 - Manual (Page 51)

KST-12025 Ku-Band Satellite Terminal Single Thread System Installation
Rev. 1 2–21
2.5.1 TX/IF Input (J1)
The TX/IF input is a TNC type connector that comes from the indoor unit. The input
impedance is 50
Ω
, and the frequency is 70 MHz ± 18 MHz. The typical power level is
from -43 to -19 dBm, depending on the customer’s configuration and application.
2.5.2 TX/RF Output (J2)
The TX/RF output is a WR-75 G interface with an output impedance of 50
Ω
. The output
frequency range is 14.0 to 14.5 GHz. The output power level is 25W.
2.5.3 RX/IF Output (J3)
The RX/IF output is a TNC type connector that sends the received signal to the indoor
unit. The output impedance is 50
Ω
, and the frequency is 70 MHz ± 18 MHz.
The 1 dB output compression point is +17 dBm.
The level of the signal at the RX/IF output is a factor of input signal level and total
system gain.
The system gain is adjustable by the user over a 25 dB range.
The typical system gain includes a 50 dB LNA, making the total typical system gain 70
to 95 dB.
Note: A 60 dB LNA is only used when there are extremely long cables from the LNA to
the down converter.
2.5.4 RX/RF Input (J4)
The RX/RF input is a type N connector that comes from the LNA. The input impedance
is 50
Ω
. The connector also has the LNA DC power on the center conductor.
The input frequency range depends upon receive band options, either:
•
Full 10.95 to 12.75 GHz band
•
Individual sub-band:
! 10.95 to 11.7 GHz
! 11.7 to 12.2 GHz
! 12.25 to 12.75 GHz