Comtech EF Data KST-2000A/B - Manual (Page 20)

Ku- Band Satellite Transceiver Revision 9
Introduction MN/KST2000AB.IOM
1–6
1.1.5 Single-Thread KST-2000A System
A block diagram of a single-thread, KST-2000A system is shown in Figure 1-3.
Note: The modem, the remote M&C, OMT, and the antenna are not part of the
KST-2000A system and are shown for reference only.
Figure 1-3. Single Thread KST-2000A System
The M&C remote control, whose operation is described in Chapter 3, is used to set the
operating parameters of the KST-2000A/B system such as transmit and receive
frequency, gain, etc.; and to monitor the operation of the system. Connection to the
remote M&C is only required during setup and for interrogating the system health status.
Alternately, the keypad/display can be used to set the operating parameters of the KST-
2000A/B and to query the system for faults. Connection to a remote terminal is not
required for the keypad/display to function, as the keypad/display is totally independent
of the remote control system.
In the transmit (Uplink) direction, the converter unit receives a 70 MHz
± 20 MHz signal
(140 MHz
± 40 MHz signal optional) at –25 to –45 dBm from a modem via a 50 or 75 Ω
coaxial cable. The converter’s input connector for this signal is a type N, female.
The converter unit performs a block conversion (non-inverted sense) first to S-Band, then
to Ku-Band. The exact frequency output and power level are set by the user via the
remote M&C or keypad/display. The converter output is coupled to an HPA via a coaxial
cable with a 50
Ω, female, type N connector at the converter output.
Indoor Units
(Reference Only)
Modem
Remote
M&C
OMT
TRF
HPA
Converter
Unit
TX
RX
TX
M&C (Power)
Ku-Band
LNA
Ku-Band
L-Band
RX Monitor
Reference Only
70 or 140 MHz
Antenna
Ku-Band &
DC Power
Ku-Band