easy2log© RT0005 Technical Information Manual
32
Air Link Protocol Characteristic
Physical Layer
The RT0005 tag in general satisfies the EPCglobal C1G2 physical layer protocol specification (see § [RD3]) with
exception of the following points:
Reader to tag data rates:
interrogator shall communicate using Tari value of 25 µsec only. Tari values of 12.5 µsec and
6.25 µsec are not supported.
Tag to reader encoding:
the encoding format, selected in response to interrogator commands can be either FM0 or
Miller (M=4) as specified in [RD3] chapter 6.3.1.3.2. Miller data encoding with M=2 and M=8 are currently not
supported.
Tag to reader data rates:
the RT0005 tag supports tag to interrogator data rates and link frequencies as specified in the
following table:
DR
Divide Ratio
TRcal
2
LF
Link Frequency
Encoding Type
8
200 µsec
40 kHz
FM0
64/3
66.6 µsec
320 kHz
Miller M=4
64/3
83.3 µsec
256 kHz
Miller M=4
64/3
85.3 µsec
250 kHz
Miller M=4
Session:
Session S1 has an infinite persistence time, so have the S2 and S3 sessions.
Commands:
all the EPC C1G2 mandatory commands are supported as well as the optional Access command.
2
TRcal: Tag-to-Interrogator calibration symbol
