User's Manual

i-PORT III User’s Guide
Document ID: UG-i-PORT III NAE -25-
i-Q TxPower Power setting for i-Q tags at time of scan (send)
i-D TxPower Power setting for i-D2 tags at time of scan (send)
Note: This settings have no function in this version operating under FCC 15.231!
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
Cable Loss Differences in the various antenna types and cable lengths can be adjusted
here (A calculation example is shown below.)
Synch Group Antennas can be separated in different groups for synchronizing different i-
PORTs
Calculation examples for “Cable Loss” field:
Coaxial cable RG58 has a loss of approximately 0.6dB/m (at 900 MHz). LMR-400 has a loss of approximately
0.06dB/m. Loss across an SMA connector is approximately 0.2dB. Loss across an N-to-SMA adapter (required
to connect LMR-400 to the I-PORT) is 0.4dB.
1) 5dB gain antenna, 3-meter “pigtail” RG58 cable: –(Antenna Gain – Cable Loss - SMA Connector Loss) = –
(5dB – 3m x 0.6 dB/m – 0.2 dB) = –3.0 dB
2) 5dB gain antenna with N-connector on the antenna, 100-meter LMR-400 cable plus 2 -meter RG58 adapter
cable: –(Antenna Gain – N-connector Loss – LMR-400 Cable Loss – N/SMA Adapter Loss – RG58 Cable Loss –
SMA Connector Loss) = –(5dB – 0.2dB - 100m x 0.06dB/m – 0.4dB – 2 x 0.6dB/m – 0.2dB) = +3.0 dB
Valid values for each parameter in the i-PORT Configuration section can be obtained from
Appendix A.