KCMX INPUT AND OUTPUT

KCMX INPUT AND OUTPUT— The KCMX can receive ready digital (RD) data from up to eight radar azimuth converters (RACs). The ENTER signal indicates that the ready digital (RD) data is valid and may be sampled and sent to the controlling computer. The KCMX is capable of outputting data over four digital output channels (DOCs) and receiving data from four digital input channels (DICs). These channels can be manually set to computer (COMPUTE) or peripheral (PERIPH) formats. The KCMX can receive up to 60 status signals. The status signals’ conditions (0 or 1) are inputted to the computer as two 30-bit status words. The KCMX generates control signals based on individual bits set in two control words received from the controlling computer. KCMX CONVERSIONS— The KCMX can accept and convert inputs from up to 323-wire synchros using 12 reference voltages. Two separate conversions are performed for each input, one for the fine speed and one for the coarse speed. When converting single-speed synchro inputs, both conversions are performed. However, the fine conversion is ignored and the bits that apply to the fine conversion in the BAM word are zeroed. SWITCHBOARDS— Switchboards are used to interconnect a ship’s systems. There are two major types of switchboards: digital and analog. DIGITAL SWITCHBOARDS— Digital switch- boards primarily interconnect digital devices. There are two types of digital switchboards: manual switchboards and remotely controlled switchboards. MANUAL SWITCHBOARDS— Manual switch- boards are made up of variable configurations of manually operated three-position and five-position switches. REMOTELY CONTROLLED SWITCH- BOARDS— Remotely controlled switchboard configuration changes are accomplished from one of two computer switching control panels (CSCPs). The CSCP generates control signals to position the linear slide switches and receives status signals from the switches to indicate current switch position. DIGITAL FIRE CONTROL SWITCHBOARD (DFCS)— The digital fire control switchboard (DFCS) performs data routing, power monitoring, action cutout (ACO) switching, and digital switching. SHIP, SWITCHBOARD, AND CSCP WIRING— All cables and wires used aboard a ship are labeled with a specific code. Specific codes are used to identify ship’s wiring, switchboard wiring, and CSCP wiring. These codes are found on metal or plastic labels on each end of the cable. ANALOG SWITCHBOARDS— Analog switch- boards receive control signals from the multiplexing data converter to position the automatic junction rotary (AJR) switches and provide status signals to indicate switch status. END-AROUND-TEST (EAT)— One of the functions provided by both analog and digital switchboards is the end-around-test (EAT). When switches are set to the EAT position, the switchboard routes the output of a device back to the same or similar device as input data. 13-41