User's Manual
i-PORT MB – Manual
Version 1.1 02.02.2007 Page 29/
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0x1B R/W -128 Tag entry RX level
Ant 1
Signed char
0xff = -1dBm
0x80 = -128dBm
0x1C R/W -128 Tag exit RX level
Ant 1
Signed char
0xff = -1dBm
0x80 = -128dBm
0x1D R/W 1 RF sensitivity Ant
1
0x00 – low sensitivity (-55 dBm)
0x01 – high sensitivity (-85 dBm)
0x1E R/W Reserved
0x1F R/W 0 RF offset Ant 1 Signed char in dB
This offset is added to the tag RSSI value before being
processed
0x20 R/W -128 Tag entry RX level
Ant 2
Signed char
0xff = -1dBm
0x80 = -128dBm
0x21 R/W -128 Tag exit RX level
Ant 2
Signed char
0xff = -1dBm
0x80 = -128dBm
0x22 R/W 1 RF sensitivity Ant
2
0x00 – low sensitivity (-55 dBm)
0x01 – high sensitivity (-85 dBm)
0x23 R/W Reserved
0x24 R/W 0 RF offset Ant 2 Signed char in dB
This offset is added to the tag RSSI value before being
processed
0x25 R/W
Frequency This parameter is writable only if the reader supports more
than 1 frequency and the frequency can be changed otherwise
it will return the reader frequency.
1 EU
2 NA
0x26 R/W Reserved
Note 1: Tags which have not been detected for an interval longer on than the inhibit time (and have been
transmitted to the host) are removed from the list. Tags which are still in the list are re-reported if the re-
reporting interval has expired.
Tags are only removed from the list after one of those conditions:
• Tag is reported and the inhibit time condition occurs.
• The list is full and list behaviour is set to 0
• After issuing a clear list command (parameter 0x15).
List Command:
When a tag is reported, the maximum RSSI value and Number of count seen are resetted so after using the
List command to mark all tag has not reported, the get Tag command may return a list of tag with invalid
Maximum RSSI value or count number.
Parameters 0x17 to 0x1A are used for compatibility with the iPort R2 reader.
These parameters should be used only if we do not need to know on which antenna a tag has been detected
and if the parameters are identical on both antennas.
CAUTION:
If these parameters are used please DO NOT USE parameters 0x1B to 0x24 and vice-versa.
The reader uses parameters above 0x1A, setting parameters 0x17 to 0x1A will also change
corresponding parameters above 0x1A. If one of the parameters above 0x1A is changed, reading
parameters 0x17 to 0x1A may return an invalid value.