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1.2 Authorized Antennas
The antenna authorized by the FCC for use with the
V740 Reader is described below.
IMPORTANT: No other antennas may be used with
the V740 Reader without violating FCC regulations. It
is the responsibility of the user to comply with this
requirement.
1.2.1 Antennas
Bi-static Circular Antenna
Model: V740-HS02CA, V740-HS02C
Polarization: Circular
Gain: 6dBi max.
Connector: N-Female
Cable length : 0.3m(0.98')
1.2.2 Antenna Cables
The only cables authorized by the FCC for use with
the V740 Reader are listed below:
Short cable
Model: V740-A01-3.0M
Length: 3.0m(9.8')
Insertion Loss: 1.5 dB min.
Cable Type: 3D-2V
Connector: Reverse TNC to Type N
Cable Diameter : 5.5mm(0.22'')
Long cable
Model: V740-A01-10M
Length: 10m(32.8')
Insertion Loss: 1.5 dB min.
Cable Type:5D-SFA
Connector: Reverse TNC to Type N
Cable Diameter : 7.6mm(0.30'')
V740 RFID READER/WRITER, ANTENNA
OPERATION MANUAL
(Options)
(Options)
9 of 56
1.2.3 Setting the Reader RF Power
During initial installation, the reader must be properly
configured to use the correct RF power to comply with
FCC regulations. DO NOT increase the power beyond
the recommended power setting as calculated below.
The maximum RF power is determined from antenna
gain and antenna cable loss using the formula:
Pmax = 36 dBm - Antenna Gain + Cable Loss
For example, if the antenna has a maximum gain of 6
dBi, and the cable has a minimum loss of 1.5 dB, the
maximum RF power that may be set is (36- 6 + 1.5) =
31.5 dBm.
The Reader RF Power is set through the Settings
Page as described on Page18.
Note that in no case may the power be set higher than
31.5 dBm.
Recommended Power Settings
Antenna Type
V740-HS02CA
V740-HS02C
Short Cable/Long Cable
31.5 dBm
2005-09, REV0.1
©OMRON CORPORATION 2005
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