turck 100000897, Instructions For Use Manual

Page: 27 / 106

V02.00 | 2021/05
27
7.1.6 Setting antenna power
The antenna power of the reader can be set for the specific application. The radiated power for
the integrated antenna can be entered directly in the DTM. The power must be calculated for
external antennas.
The following parameters must be used to calculate the radiated power (P
ERP
):
P
cond
Power to be output at the TNC socket of the reader
dB Cable attenuation
G
HW
Antenna gain of the external antenna
NOTE
Refer to the data sheets of the components used for the cable attenuation and
antenna gain.
BUS
ERR
RUN
APP
LAM PWR
RFON
DATA
DIAG
USER
Conducted
power
P
cond
Cable
attenuation
dB
Antenna
gain
G
HW
Radiated
power
P
ERP
Antenna
Fig. 24: Power calculation – relevant variables (schematic representation)
The power can be calculated with the following formula:
P
ERP
= G
HW
- dB + P
cond
Setting antenna power – restrictions of radio regulations
Some national regulations restrict the degree of freedom available for creating an RFID system.
You as the operator are responsible for ensuring that regulations are observed.
n
ETSI
– Radiated power P
ERP
: max. 33 dBm ERP
n
FCC
– Radiated power P
ERP
: max. 36 dBm EIRP
– P
cond
: max. 30 dBm with antenna gain G
HW
≤ 6 db
NOTE
The DTM indicates impermissible configurations with an exclamation mark. A trans-
mission to the device is prevented.