Configuration manual Reader
9
Modifications, misprints and errors excepted.
English
2.
Description of the configuration parameters
2.3.
“MultiplexingExposureTime1...8”
Characteristics:
available from firmware:
v1.30.00
Data type:
Word (16-bit)
Unit:
milliseconds
Value range:
0-65535
Description:
The values of these configuration parameters are of interest only to reader commands that start with “ASync...”.
Each parameter stands for an exposure time which specifies how long the reader maintains exposure for inventories
the respective position – and hence antenna – in the multiplex list. In contrast to synchronous commands, when
using asynchronous commands the reader does not proceed to the next entry in the multiplex list immediately
after performing an inventory; instead it first waits until the exposure time given by these parameters for the
respective multiplex entry has expired. An inventory in progress is not interrupted at the expiry of the exposure time,
but is continued to completion.
2.3.1.
“CableLoss1...8”
Characteristics:
available from firmware:
v1.30.00
Data type:
Byte (8-bit)
Unit:
¼ dB
Value range:
0-255
Description:
These parameters contain the cable attenuation of the antenna cable between the reader and the antenna for the
respective antenna port of the reader. The reader can set the transmission power correctly only if the attenuation
values for the antenna cable have been entered correctly.
2.3.2.
“AntennaGain1...8”
Characteristics:
available from firmware:
v1.30.00
Data type:
Byte (8-bit); signed
Unit:
¼ dBic
Value range:
-128 – 127
Description:
These parameters allows the antennas gain for the antennas connected to the reader to be communicated to the
reader. The reader calculates from the transmission power setting (antenna radiated power), the antenna gain
and the cable attenuation the port power at the RF output:
Use the following formula to convert an antenna gain expressed in
dBi
to
dBic
units:
Antenna gain
dBic
= antenna gain
dBi
+ 3
Port power
dBm
= radiated power
dBm(erp)
– antenna gain
dBic
+ cable attenuation
dB
+
5.14
