K-Best Technology Inc. E1, Руководство пользователя

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Interface
E1 Spread Spectrum Radios
5-19
Figure 5-38 IF-Loop:En/Dis (1)
In IF Loopback , appears at the right bottom of the LCD. TEST led gives an orange glow.
Figure 5-39 IF-Loop:En/Dis (2)
C8. RF-Loop: En/Dis
RF Loopback test mainly conducts tests for condition between IDU and ODU. When RF loopback test has
been performed, the transmission between stations is interrupted. There are 3 methods to verify the
conditions:
(a)To verify thru external E1 tester
(b)To verify thru real-time BER display in LCD panel. When it displays 0.00E-7, the system is working well.
(c)To verify thru internal PRBS function.
In RF Loopback, appears at the right bottom of the LCD. The local’s and remote’s TEST led gives an
orange glows.
When the local end is executing RF Loopback, the remote end’s connection will be broken. ALM led gives a
red warning alarm.
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