User's Manual

SHENZHEN SYS IoT CO., LTD. 19 / 34
Tel: [phone]
Fax: [phone]
Mail: [e-mail]
Http://www.sysiot.cn
Add: Room 716, Yiben E-Commerce
and Industrial Park, Chaguang Road
Nanshan District, Shenzhen, China
Post Code：518055
Picture 29
Shown as Picture29: The module will transmit RF signal according to the Power value set to a
specific antenna port, Ant1 ->30dBm ， Ant 3->27dBm ， Ant4-> 20dBm . 30dBm=1W,27dBm=500mW,
24dBm=250mW,21dBm=125mW.Calculation formula:
P
dBm
=10 log(P
mW
)；
(6) ”Inventory Count”, Antenna inventory times, during multi-tag inventory, the module will send
RF signal to a specific antenna port as the set value times, when it is finished, the module will send
RF signal to the next enable antenna port. After module send signal to all enable ports, it will start
again by sending signal to the first enable port. The module will stay more times on the port when the
set value is bigger.
Important: The parameter is only effective under ”Multi-tag Inventory”.
Picture 30
Shown as Picture30,
ANT1(20)->ANT3(15)->ANT4(10)->ANT1(20)->ANT3(15)->ANT4(10)-> ……
3.5Access Tag Memory
Access tag’s memory which is comply to IOS18000-6C protocol. It includes functions ”Read”,
“Write”, “Lock” and “Kill”. Note: “Write”, “Lock” and “Kill” tag need more power than “Read” tag,
so the effective distance for them are much shorter, shorter than half of read distance.
The MenBank of tag, contents: RFU(reserved), EPC, TID(tag ID) and User blocks. Note: some
tags don’t have User block, so all operations that need to access User block will be failed.