P. 50 / 68
920MHz Band Wireless Device (Korea) USERS MANUAL EM-9121 Rev. 1
2) Click [Start] to start the measurement.
When the measurement is complete, values are displayed in the respective columns of “Measurement result,” and the measure-
ment result file is saved.
Figure 6.35 Measurement result
[Table 6.4] Measurement result contents
ITEM
EXPLANATIONS
Maximum RSSI [dBm]
Max. RSSI value in the measurement result
Minimum RSSI [dBm]
Min. RSSI value in the measurement result
Average RSSI [dBm]
Average RSSI value in the measurement result
PER [%]
Packet error rate in the measurement duration
Receive count
Number of packets received in the measurement duration
Packet Number
Latest received packet number (number of the packet the sender transmitted)
RSSI
RSSI value in receiving the latest packet
When the child device is installed in a fixed manner, it is recommended to operate it with the PER less than 0.01 % and the average
RSSI -90 dBm or more.
When the child device is used on a low-speed moving device, it is recommended to operate it with the PER less than 0.01 % and
the average RSSI -80 dBm or more.
These values are not essential.
To determine the feasibility of installation, set your own reference PER considering the error rate allowed by the system or environ-
ment in which the device is used.
