ThingMagic Astra - Manual (Page 42)

Controlling the Reader
Astra User Guide 42
Raw Tag Data
Depending on the fields included in the query, you can display a variety of tag data:
id: Tag id (in hex) and trailing 4-digit (16-bit) CRC cyclical redundancy check.
read_count: Number of times the tag was seen during the query.
protocol_id: GEN2 = 12.
antenna_id: From 1 to 2 depending on which antenna saw the tag.
frequency: Frequency in KHz at which the tag was seen, in hop table.
timestamp: Unix time in seconds and microseconds from 1-1-1970 when tag
was seen. For example: 3004832.188394
Write Page
The Astra Write Page, as shown in Figure 15 , enables you to replace the ID or data that is
encoded on a tag.
Consider the following guidelines when writing to tags:
Always place a tag 0.3-0.6m (1-2 ft) from the antenna when writing. The tag may
be damaged if it is too close to the antenna.
The ID to be written must match exactly the number of hexadecimal characters,
(numerals from 0-9 and letters from A-F) specified by the tag's protocol.
Example: 96-bit tag IDs are 20 hexadecimal characters long.
The Clear Output button clears the data displayed.
Place only one tag in the antenna's field when writing. If multiple tags are
present, they may all be encoded with the same EPC data, or the write may fail
unless the RQL query specified indicate a specific tag to be written to. See the
RQL documentation for more information.