code to be transmitted. The DTS also resets the
address control address sequence logic.
NET BUSY INDICATOR The NET BUSY
indicator is lighted when the DTS detects that the
communications net is busy.
TRANSMIT INITIATE SWITCH The
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.
SWITCH- The ADDRESS 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. When the switch is 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 depends 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
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 1364/18.18 position, the data rate is 1364 bps, but
the frame phase shift interval is increased to 18.18
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 the 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 2-17. The
address control indicator consists of 20 identical
address selection modules, which are used to address
up to 20 stations.
More than one address control
indicator may be installed in a system to provide the
ability to interrogate more than 20 stations.
Each address selector module has two thumb
wheel switches in which one of 64 octal addresses
may be entered (address 00 and 77 octal are invalid).
Also, each address selector module has a power on/off
switch, a power on indicator lamp, and a call
indicator, as shown in figure 2-18.
data at 1364 bps. The data frame phase identification