a 2003 document whose - Institute for Simulation and Training ...

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Section 8
Distributed Emission Regeneration family
2) Fundamental Operational Data Record: System Status: System On/Off. The System
On/Off Status shall be set to 1 (On) if the RRB Response Status (bit 13 in Parameter 1) is
set to 1 (On), the RRB Response Damage (bit 14 in Parameter 1) is set to 0 (No Damage)
and the RRB Response Malfunction (bit 15 in Parameter 1) is set to 0 (no malfunction).
Otherwise the status shall be set to 0 (Off). If the Entity State PDU Appearance Damage
Status value = 3 (Destroyed) for the associated entity and the entity is not canceled at the
time it is destroyed, the System Status/System On/Off field and the Parameter 1 Status
fields (Bit 13) shall be set to 0 (Off). This change in status shall be automatically set
within 10 seconds of the simulation determining that the entity could no longer transmit a
reply to an interrogation. For the destroyed case, it is not required that the Operational
Status field be set to System Failed or the Parameter 1 Damage or Malfunction Status
fields be set to 1. However, these fields can be set if desired. At least three periodic
updates shall be sent for the IFF/ATC/NAVAIDS PDU following the change to Off status
due to the entity being destroyed. After the three periodic updates are sent, a simulation
may either continue to send periodic updates or cease sending them.
3) Fundamental Operational Data Record: Operational Status. This status shall be set
to 1 (System failed) if the RRB Response Damage bit (bit 14 in Parameter 1) is set to 1
(Damaged) or the RRB Reponse Malfunction bit (bit 15 in Parameter 1) is set to 1
(Malfunction). Otherwise, the status shall be set to 0.
4) Fundamental Operational Data Record: Parameter 1 Code. Codes shall reflect the
present code settings for an entity at the time an IFF/ATC/NAVAIDS PDU is transmitted
and are independent of the present Mode Status settings. Code 0 shall not be used to
indicate off for a mode. However, code zero may be transmitted for a mode if that is the
setting for the transponder.
5) System ID Record: Change Indicator. The Change Indicator shall be set to 1 for all
initial reports and whenever a change is a being reported even if the change coincides
with a periodic update report. For all other cases, the Change indicator shall be set to 0.
8.3.6.4 Receipt Rules: System Type 5 (RRB Transponder)
1) Fundamental Operational Data Record: Parameter 1 Codes. Code values of zero
shall be valid and shall not be interpreted as a Mode Off status.
2) If a receiving site/application has the capability to set transponder data for received
entities for distribution to other applications not directly connected on the DIS network,
receipt of transponder data on the received entity shall always override locally entered
data for the received entity.
3) A receiving site/application may perform validity checks on parameter data to
ensure they are within the limits specified in the DIS enumeration document. Only
invalid data for the specific parameter processed shall be ignored. Any previously
accepted data for that parameter may either be retained or cleared.
4) Fundamental Operational Data Record: Mode Status. The Mode Status - Damage
and Malfunction field values shall be processed upon receipt as agreed to by participants
prior to a DIS exercise.