Installation Manual Part 2

Installation manual Reader 64
Modications, misprints and errors excepted.
English
6. Operating the reader
If the gain of the antenna is referred to the polarisation of a circular isotropic antenna (dBic), the linear gain of the
antenna is 3 dB lower. As a result the transmission power can be increased by 3 dB.
In the FCC / IC approval region, the RF power connected at the antenna input must not exceed 1 W. If the gain of the
antenna is higher than 6 dBi, the RF power connected must be reduced correspondingly. The reader's transmission
power is then:
If the antenna gain is stated in dBic, the reader's transmission power can be increased by 3 dB.
The transmission power for the European variant can be set in 0.25-dB steps from 20 dBm to 33 dBm.
The heading provides separate elds for inputting the antenna gain and the attenuation.
Note
The antenna gain must be stated in dBic.
The RFID reader's transmission power can be set separately for each antenna or all antennas at the
same time. If the All antennas same power check box is set, the sliders for the other antennas are
set to the same power when a slider for the power for antenna 1-4 is adjusted. If this check box is
not selected, the power at the antennas can be set separately for each output.
Pre-dened antennas can be selected in the Antenna type selection drop-down menu. This selection sets
the antenna gain in the program, and limits the transmission power to the maximum value permitted for this
antenna. If Custom antenna is selected, the gain and power can be freely set.
The context menu allows the XML le to be opened, and if changes are made to the le also allows it to be reloaded.
When the le has been loaded, the changes are visible in the program.
G
HW
= G
isot
– 2.14dB
G
HW
....Gain based on a half-wave dipole
G
isot
....Gain based on an isotropic radiator in dBi
G
HW
= G
isot
– 2.14dB – 3dB
G
HW
....Gain based on a half-wave dipole
G
isot
....Gain based on an isotropic radiator in dBic
P
Reader
= P
cond
+ D
Kabel
with P
cond
≤ 1W and G
isot
≤ 6dB
P
Reader
...Transmission power of the reader in dBm
P
cond
......Power on antenna output in dBm
D
Kabel
.....Cable attenuation in dBm
G
HW
......Antenna gain in dBi
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