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st
1
line of the LCD display – refreshes every alternate 1~2 seconds.
Left hand side: IDU temperature. O-Temp: xx.x
Right hand side: 4XE1 stands for the system capacity. LAN stands for the system support Ethernet
transmission function. 2.4/5.8G stands for the operating frequency.
nd
2
line of the LCD display – refreshes every alternate 1~2 seconds.
Left hand side: R: xxxdBm stands for the real-time online receiving power. T: xxxdBm stands for the real-time
online transmitting power.
Right hand side: On the right hand side, it displays the bit-error rate (BER).
Note: Bit Error Rate (BER): The conversion formula for accumulated bit errors is:
BER = (n/EN*S).
where, n = number of times of bit error;
EN = rate of the equipment, E1's rate is 2.048M S = running time ( in seconds).
For example:
Present bit error times is 3, running time is 2 minutes and system interface is E1
BER = (3 / (2.048 * 106 * 2 * 60)) = 1.2 2 * 10-8
Present bit error times is 1000000, running time is 4 minutes and system interface is E1
BER = (566 / (2.048 * 106 * 4 * 60 * 60)) = 3.39 * 10 -5
Under alarm condition, the LCD displays as below:
Figure 5-3 LCD Function Keys (2)
stands for ODU temperature.
5-3
Interface
E1 Spread Spectrum Radios
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