User Manual

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Document #7201-001, Rev C Page 22
Event message:
Settings to determine when an event message is to be sent and how it should look.
Event reason A tag or an input can serve as a trigger for an event
Tag 3 possibilities: “Enter”, “Leave” or “Enter or Leave”
A message is generated when the tag enters the zone, when it leaves the
zone, or both when it enters AND when it leaves the zone.
Input 3 possibilities: “Rising Edge”, “Falling Edge” or “Changing”
A message is sent when the trigger detects either a rising edge, a
falling edge, or when changes in the Input occur.
Message content Each message can contain up to 4 additional pieces of information. By
clicking on the check box, the corresponding information is added to
the message (in addition to the Tag ID): i-PORT ID, Time/Date, Tag
Status and Field Strength.
Antenna settings:
Settings for the antennas, power outputs, etc.
Enable By marking the check box, the corresponding antenna is activated
Scan Enable By marking the check box, the corresponding antenna is also able to send
i-Q TxPower Power setting for i-Q tags at time of scan (send)
i-D TxPower Power setting for i-D tags at time of scan (send)
Rx Threshold Threshold (field strength of tag signal) required for tag recognition
Sensitivity i-PORT receiver mode; this means that the Rx Threshold reaches –60dBm
in low sensitivity mode and –90dBm in high sensitivity mode
Calibration Differences in the various antenna types and cable lengths can be
adjusted here (see example below)
Valid data for each parameter can be obtained from table in Appendix A.
Sequence:
A sequence is defined as successive scans on one or several antennas.
Example: 2 antennas are connected (enabled and scan enabled)
“Scan” command is sent to the i-PORT
Scan is executed on Antenna 1 (Tx), Antennas 1 and 2 receive (Rx)
Scan is executed on Antenna 2 (Tx), Antennas 1 and 2 receive (Rx)
Results of the scan command / sequence are sent back
Calculation example for calibration:
Coaxial cable RG58 loss of approximately 6dB for every 10 meters (at 900 MHz), i.e. 0.6
dB/m
1) Antenna 1: 5dB gain, 3-meter coaxial cable
Antenna 2: 5dB gain, 10-meter coaxial cable
Calibration parameters
Antenna 1 = –(Gain Ant1 – Loss Cable 1) = –(5dB – 3m x 0.6 dB/m) = –3.2 dB
Antenna 2 = –(Gain Ant2 – Loss Cable 2) = –(5dB – 10m x 0.6 dB/m) = +1.0 dB
2) Antenna 1: 5dB gain, 3-meter coaxial cable
Antenna 2: 5dB gain, 15-meter coaxial cable
Calibration parameters