Loop Tests - SAF CFM-LM Series Technical Description

M A N A G E M E N T S Y S T E M

Loop Tests

Loop tests (loopbacks) are to be used for installation, fault tracing, performance or connectivity
measurements and other.
Loopback tests are accessible using local and remote management methods (except for the Web
terminal).
The following loopbacks are available:
•
Baseband loopback
•
Interface loopbacks
•
RF (Radio) loopback (see notes below)
The RF and Base-band loopbacks can be set on a fixed time interval only.
Baseband loopback
Baseband loopback: The modulated signal on the baseband modem output is immediately looped
back to the receiving device. There are two baseband loop tests available:
•
Analog: The analog loopback is not dual;
•
Digital: The digital loopback is dual.
Both Baseband loops can not be set simultaneously.
Radio loopback
RF loopback: the signal is transmitted (through the radio) and immediately received (with the same
frequency) and looped back to the receiving device. This is the special operation mode, where the
Rx frequency during the loopback test time is set equal to the Tx frequency. The RF loopback is
not dual.
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