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|  | (0xFF,0xD0) Event Source | 
|  | Identifies which event trigger caused this packet to be emitted. 
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|  | 
|  | (0xFF,0xD1) Ticks | 
|  | Time since powerup in multiples of the base rate. 
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|  | 
|  | (0xFF,0xD2) Delta Ticks | 
|  | Ticks since the last output of this field. 
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|  | 
|  | (0xFF,0xD3) Gps Timestamp | 
|  | Outputs the current GPS system time in time-of-week and week number format. 
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|  | 
|  | (0xFF,0xD4) Delta Time | 
|  | Time in the synchronized clock domain since the last output of this field within the same descriptor set and event instance. 
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|  | 
|  | (0xFF,0xD5) Reference Timestamp | 
|  | Internal reference timestamp. 
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|  | 
|  | (0xFF,0xD6) Reference Time Delta | 
|  | Delta time since the last packet. 
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|  | 
|  | (0xFF,0xD7) External Timestamp | 
|  | External timestamp in nanoseconds. 
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|  | 
|  | (0xFF,0xD8) External Time Delta | 
|  | Delta time since the last packet containing delta external (0xFF,0xD4) or delta gps time (0xFF,0xD8). 
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