Document# SCT-UM2A61VC
Page 7 of 11
4.2
Control and Configuration Ports
USB Control Interface – This port provides a CDC USB device class that utilizes the Console Protocol defined in
document SCT-SW1A61vc (“SC2444 Configuration and Control API”).
Auxiliary Control Interface – This port interfaces with the optional external TX IQ Filter Bank (part number
SC4710) or provides a UART Serial Bus supporting the Console Protocol.
Expansion Port – This port enables support for multi-unit configurations by vertically stacking up to four SC2444
units. This port utilizes the high-speed Binary Protocol over an SPI interface. Custom hardware containing an
FPGA or microprocessor can access this port to implement application-specific control. The Binary Protocol is
defined in document SCT-SW1A61vc (“SC2444 Configuration and Control API”).
Antenna Interface – This port provides control to other devices such as an Antenna Array.
Config Port – This port sets the operating mode and identification of unit. It is also used enable in-field firmware
updates. See the API Guide for Port Settings.
4.3
IF, I/Q and LO Port Connectors
Connector
Use
Connector Type
TX
TX I IN
Frequency upconverter baseband I input.
SMA (f)
TX Q IN
Frequency upconverter baseband Q input.
SMA (f)
TX IF IN
Frequency upconverter IF input
SMA (f)
TX EXT LO IN Frequency upconverter external LO clock input
SMA (f)
RX
RX I IN
Frequency downconverter baseband I output.
SMA (f)
RX Q IN
Frequency downconverter baseband Q output.
SMA (f)
RX IF IN
Frequency downconverter IF output
SMA (f)
RX EXT LO IN Frequency downconverter external LO clock input
SMA (f)
EXT REF IN/OUT
10 MHz reference clock used to synthesize internally generated LO clocks.
SMA (f)
Table 1 - SC2444 IF, I/Q, and LO Port Connector Descriptions
4.4
24 to 44 GHz Port Connectors
Connector
Use
Connector Type
TX FDD OUT
Frequency division duplexing (FDD) output path from the frequency
upconverter
2.4 mm (f)
RX TDD IN
Frequency division duplexing (FDD) input path to the frequency
upconverter
2.4 mm (f)
RX/TX TDD
Shared time division duplexing (TDD) output path from the frequency
upconverter and input path to the frequency downconverter
2.4 mm (f)
Table 2 - SC2444 24 to 44 MHz Port Connector Descriptions
