User's Manual

V740 RFID READER/WRITER, ANTENNA 2005-07, REV.01
OPERATION MANUAL
5 of 45 ©OMRON CORPORATION 2005
1.2.3 Setting the Reader RF Power
1.2 Authorized Antennas
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 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.
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.
1.2.1 Antennas
OMRON Mono-static Antenna(Options)
The Reader RF Power is set through the Settings
Page as described on Page 14.
Model: V740-HS01L，V740-HS01C
Gain: 6 dBi max.
Connector: N
Note that in no case may the power be set higher than
32.5 dBm.
Cable length : 0.3m(0.98’)
Recommended Power Settings
1.2.2 Antenna Cables(Options)
The only cables authorized by the FCC for use with
the V740 Reader are listed below:
Antenna Type Short Cable/Long Cable
V740-HS01L
V740-HS01C
31.5 dBm
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’’)