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Connectivity Test
Figure 3-17. The UART output during PER test
When the PER-TX board is done sending 1000 packets, the PER-TX board sends packets with the payload
"DONEDONE". If the PER-RX board receives the "DONEDONE" packet, the application echoes the
total number of good packets received. The measured PER is echoed to the terminal in a 999/1000 format.
When using manual interface the PER value is echoed to the LEDs on the PER-RX board. For example,
if the measured packet received was 983/1000 then at the completion of the test, the value 1001b (9d),
1000b (8d), 0011b (3d) will blink. This example allows PER to be measured without the need for a PC.
3.6
Range Test
The range test uses the LQI in order to monitor the variation of distance between the transmitter and the
receiver in a normal transmission. This test uses two devices one configured as transmitter and the other
as receiver.
In the range test, the transmitter sends a message and waits for an acknowledge packet, then the receptor
calculates the LQI of the received packet and sent it to the transmitter into the acknowledge packet. In both
devices (transmitter and receiver) the LQI value is indicated through LEDs in the manual interface, when
serial interface is used the LQI value is sent to the serial terminal. This process is repeated until the user
finishes the test. See
Figure 3-18
MC1322x SMAC Demonstration Application User's Guide, Rev. 1.3
3-12
Freescale Semiconductor
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