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. ADDRESS COMPUTER/CONTROL 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 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 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 2-16