Address Control Indicator

If an even number of bit errors occurs, the correction circuitry is inhibited. If an odd number of bit errors occurs, the correction circuitry attempts to correct the data; however, if an odd number of multiple bit errors occurs, an erroneous correction is made. When the switch is in the LABEL position, the DTS does not attempt to correct detected errors. Instead, the data word sent to the computer is labeled to indicate that errors were detected in the data word. T R A N S M I T R E S E T S W I T C H . — T h e TRANSMIT RESET switch is a momentary contact pushbutton switch. When depressed, this switch causes any transmission in progress to be terminated. The DTS stops the transmission by inhibiting the generation of the output data request, causing a stop code to be transmitted. The DTS also resets the address control address sequence logic. TRANSMIT INITIATE SWITCH. — T he TRANSMIT INITIATE switch is a momentary contact pushbutton switch that causes the DTS to initiate data transmission when the DATA RATE switch is in the TADIL A position. The TRANSMIT INITIATE switch must be depressed to initiate all DTS transmissions except when the DTS is configured as a picket and is in the roll call mode. When the net is in the roll call mode, only the net control station is required to initiate transmission by depressing the TRANSMIT INITIATE switch. MISS CALL INDICATOR. —The MISS CALL indicator is lighted when the net control station has detected no response from a picket station after two successive interrogations. Once lit, it will remain lit until a picket responds or the TRANSMIT RESET switch is depressed. A D D R E S S C O M P U T E R / C O N T R O L S W I T C H . — T h e A D D R E S S COMPUTER/CONTROL switch determines the source of the address used by the DTS. When the switch is in the CONTROL position, addresses are obtained from the address control unit. In the COMPUTER position, addresses are obtained from the CDS computer, provided the computer is configured for external function operations. The normal position for this switch is dependent on the configuration of the system on your ship. NET MODE SWITCH. —The NET MODE switch determines the mode of operation of the DTS. The modes are BC or broadcast, SHORT BC, ROLL CALL, NET SYNC, and NET TEST. DATA RATE SWITCH. —The DATA RATE switch determines the speed and frame timing operation of the DTS. When the switch is in the 1364/9.09 position, the DTS transmits and receives data at 1364 bps. The data frame phase identification interval is approximately 9.09 milliseconds. When the switch is in the 2250 position, the DTS transmits and receives data at a rate of 2250 bps and a frame interval of 9.09 milliseconds. When the switch is in the 1364/1 8.18 position, the data rate is 1364 bps, but the frame phase shift interval is increased to 18.18 milliseconds. OWN STATION ADDRESS SWITCH. —The OWN STATION ADDRESS switch consists of two thumb wheel switches in which an address is entered to identify the address the DTS will respond to as its own. In the roll call mode and with the DTS configured as a picket station, the DTS will transmit its tactical data when the interrogation message address matches the address entered into the OWN STATION ADDRESS switches. RANGE IN MILES SWITCH. —The RANGE IN MILES switch also consists of two thumb wheel switches. These switches are used to select the approximate distance between the net control station and the picket station. The range entered into these switches causes the DTS to alter the frame timing to compensate for the signal propagation delay between the picket station and NCS. The range in miles setting for the NCS is always zero miles. Address Control Indicator The address control indicator is used to set the address of the picket stations to be interrogated when a unit is configured to operate as the NCS. The address control indicator is shown in figure 4-17. The address control indicator consists of 20 identical address selection modules, which are used to address 4-16