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920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
7.1.4 NETWORK NAME
An identifier, called network name, can be given to a network so that child devices can connect to the correct parent device even
when several parent devices are installed adjacently.
Up to 16 English one-byte characters and some symbols (one-byte space, “-”, “_”, “.” and “@”) are usable.
Register a network name to all the parent and child devices.
A child device cannot connect to a parent device with a network name different from that set to the child device.
Using this network name, a PAN which is individually configured by each parent device can function as one network.
Set a network name as shown in the table below.
[Table 7.5] Network name
DEVICE
SETTING
SPECIFICATIONS / RANGE
REMARKS
Parent
Essential
English one-byte characters and symbols
within 16 characters
*
Set to a value that does not overlap with that of other
parent devices.
Child
Essential
English one-byte characters and symbols
within 16 characters
*
Set the same value as the parent device to which to
connect.
*
One-byte space, “-”, “_”, “.” and “@”are usable.
7.1.5 TRANSMITTER POWER OUTPUT
The radio wave reachable distance changes depending on the transmitter power output.
The transmitter power output is selected from 12.5 mW, 5 mW, 1 mW, and 0.16 mW.
[Table 7.6] Transmitter power output
DEVICE
SETTING
SPECIFICATIONS / RANGE
REMARKS
Parent
Required
12.5mW / 5mW / 1mW / 0.16mW
Child
Required
12.5mW / 5mW / 1mW / 0.16mW
7.1.6 RETRY TIMES BEFORE ROUTE SWITCHING
Select the number of times to retry transmission before switching the route when the communication through a route from a parent
device to repeaters or child devices (hereafter referred to as ‘downstream route’) fails.
Select the number of times from 1, 2, and 3 times.
When the retry times is set to 1, the switching time can be shortened and a route in better communication state is selected when a
communication error occurs.
However, there is a risk that a communication error due to just temporary fluctuation of radio wave can cause the route switching
and a communication route in good communication state may be switched.
Based on the above, 3 retry times is balanced well between switching frequency and communication reliability.
[Table 7.7] Retry times before route switching
DEVICE
SETTING
SPECIFICATIONS / RANGE
REMARKS
Parent
Required
1 / 2 / 3
Child
Required
1 / 2 / 3
