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V740 RFID READER
NOTE. SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE. REV. 1.1
OPERATION MANUAL
4 of 27
© OMRON CORPORATION 2004
Authorized Antennas
The only antennas authorized by the FCC for use
with the V740 Reader/Writer are listed below.
Detailed information on each antenna is available
from their respective manufacturers.
IMPORTANT
: No other antennas may be used
with the V740 Reader/Writer without violating FCC
regulations. It is the responsibility of the user to
comply with this requirement.
OMRON Dual Patch Antenna
Model: V740-HS02C
Gain: 6 dBi max.
Connector: Reverse TNC
Antenna Cables
The only cables authorized by the FCC for use with
the V740 Reader/Writerare listed below:
Short R-TNC/N
Model: V740-A01-3.0M
Length: 9.8'
Insertion Loss: 1.4 dB min.
Cable Type: 3D-2V
Connectors: Reverse TNC to Type N
Long R-TNC/N
Model: V740-A01-10M
Length: 32.8'
Insertion Loss: 1.5 dB min.
Cable Type: 5D-SFA
Connectors: Reverse TNC to Type N
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 this level.
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 1.4
dB, the maximum RF power that may be set is (36-
6 + 1.4) = 31.4 dBm.
The Reader RF Power is set through the
Settings
Page
as described on Page 10. Note that in no
case may the power be set higher than 32.5 dBm.
Recommended Power Settings
Antenna Type
Short Cable
Long Cable
V740-HS02C 31.4
dBm
31.5dBm