Comtech EF Data C5 - Manual (Page 25)

C5/K1/K3 Integrated Satellite Terminal System Introduction
Rev. 0 1–5
The Ku-Band satellite terminal system is divided into two areas of operation:
1. SDT-5200 Indoor Unit (IDU). A complete, variable data rate modem, high
stability references, and power supply for the ODU in a 1 RU package.
2. Outdoor Unit (ODU). The ODU is mounted on the antenna feed horn and
directly connected to the OMT. In addition, it also directly interfaces via two
coaxial cables to the IDU.
Ku-Band - The ODU accepts a 790
" 11 MHz TXIF signal and transmits it in the 14.0 to
14.5 GHz frequency band. The maximum available transmit power is +29 dBm (P1dB)
or +34 dBm (P1dB) depending on the option selected. Output power level is controlled
by an ALC loop to provide extremely stable output power regardless of temperature
variations.
Ku-Band - The ODU accepts an RF signal in one of several Ku frequency bands. The
ODU amplifies, then down-converts the signal to an IF of 950 to 1450 MHz. An
integrated transmit band reject filter prevents the integrated low noise amplifier (LNA)
from being overloaded.
1.1.2 Additional Features
The system contains the following additional features:
Note: These features are fully described in Appendix A.
! Fully Accessible System Topology (FAST): EFData’s FAST system allows
immediate implementation of different options through the user’s keypad.
! Sequential Decoder: The sequential decoder is used in Closed Network
applications, typically in Frequency Division Multiple Access (FDMA).
! Asymmetrical Loop Timing: Asymmetrical loop timing is the same timing
method that is designed into the SDM-650B TROJAN interfaces.
! INTELSAT Reed-Solomon Operation: The Reed-Solomon Codec works in
conjunction with the interface card to provide concatenated convolutional
encoding and decoding.
! Automatic Uplink Power Control (AUPC): The AUPC feature works with the
ASYNC option to allow remote communication between a local modem and a
remote modem.
! Asynchronous Channel Unit Overhead: The asynchronous (ASYNC) interface
option provides the interface for terrestrial data and single ASYNC overhead
channel.