User guide
System Output
D2119 Dart RTLS User Guide 87
P,00002294,1.1,2.2,8.5,12,1161175614.527,B1,C1
In this example, Receiver units A1, B1, and D1 have detected tag 00002294; the Non-locate
details (C1) indicates that a location computation was not made because virtual group 1 could
not converge on a good location computation. This information likely means that one or more of
the Receivers reporting tag 00002294 are getting an indirect signal (reflection) instead of a direct
signal from the tag.
In the following example, VG1 has no reference and VG2 is outside of the bounding box:
P,0000099C,100.0,15.4,8.5,13,1161175614.363,C1,R1B2
P,0000099C,99.8,43.4,8.2,13,1161175614.363,D1,R1B2
P,0000099C,6.3,43.4,8.5,13,1161175614.363,A1,R1B2
P,0000099C,1.1,2.2,8.5,13,1161175614.363,B1,R1B2
In this example, the Receiver units A1, B1, C1, and D1 have detected tag 0000099C; the Non-
locate details (R1B2) indicates that a location computation was not made because VG1 did not
have a good reference tag signal and VG2 computed a position outside of the user-defined area
for that virtual group.
N (Extended non-locate) packets
‘N’ packet give extended information for a ‘P’ (presence) packet for a non-locate. ‘N’ packets
facilitate getting more information for a ‘P’ packet by including the detect details in addition to
the non-locate details. Note: When ‘N’ packets are enabled, non-locates generate ‘N’ packets
instead of ‘P’ packets.
The format of the ‘N’ packet is as follows :
N,<tag #>,0.0,0.0,0.0,<battery>,<timestamp>,00,<non-locate details>,<detect details><LF>
Example 1:
N,00210EA1,0.0,0.0,0.0,10,1433426937.852,00,M1M2M4,HFF-H42-H43P2-H84P2
o M1M2M4 - non-locate details indicating minimum unit for the virtual groups 1, 2
and 4 were not met.
o HFF-H42 – receivers FF and 42 saw the blink and were not pruned or pre-pruned in
any virtual groups.
o H43P2-H84P2 – receivers 43 and 84 saw the blink but were pre-pruned in virtual
group 2.
Example 2:
N,A0002044,0.0,0.0,0.0,12,1433426937.874,00,M1B2B4,H41-H81-H42-H82R2R4-
H43R2R4-H84
o M1B2B4 - non-locate details indicating minimum unit not met for virtual group 1
and bounding box not met for virtual groups 2 and 4.
o H41-H81-H42--H84 – receivers 41, 81, 42 and 84 saw the blink and were not pruned or
pre-pruned in any virtual groups.
o H82R2R4-H43R2R4 – receivers 82 and 43 saw the blink but were pruned out in
virtual groups 2 and 4.