User's Guide

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16.3 Basic Reading
This tab is divided into two parts, the left part contains a table with information about the read tags (Ⓐ in the gure
below), the right part (Ⓑ) shows the statistics as well as options to control the reading process, described in the chap-
ters to follow.
The appearance and disappearance of a tag is shown in colour for better visual eect. When a tag appears in the eld,
the row is represented by the green tag information, when it disappears, the row is red.
A
2
3
1
4
5
6
7
8
9
10
11
B
Fig. 52: Basic reading
①
EPC length indicates the length in bits of the EPC; valid lengths 0–496
②
EPC EPC of the tag in the hexadecimal representation
③
Port antenna port at which the tag is read; valid values 1–4
④
RSSI unitless (shown as having no units) signal strength of the tag response
⑤
RSSI DBM shows the RSSI value in dBm
⑥
Reads shows how many times this tag has been read successfully
⑦
Cycles indicates how often an inventory has been started
⑧
First read timestamp of the rst tag reading
⑨
Last read timestamp of the last tag reading
⑩
Frequency shows the used transmission frequency
⑪
Tag phase
shows the tag phase in form of a rotating pointer
This parameter is used to distinguish between stationary and moving transponders.
If the transponder is moving away from the antenna, the pointer rotates counterclockwise, and
clockwise, if the transponder is moving towards the antenna.
The movement speed is directly proportional to the rotational speed of the pointer.
In a full rotation of 360°, the transponder travels a distance of 17cm.
Note that the reader has to change the transmission frequency every 4 seconds,
causing a phase jump.
The tag phase is also shown in the TagScan monitor; see TagScan