Base-Band And Radio Loop Tests - SAF CFM-34-REBM Manual

4.6.2 Base-band and Radio loop tests

Base-band and Radio (RF) loopbacks can be set on a fixed time interval only; if using
LCD/Keypad, the base band and RF loop test is set for 1 minute.
Radio 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.
From Telnet or ASCII console:
To set the radio loopback from Telnet or ASCII console, use the following
command: "RFloop {on|off} [duration]", duration = 1 min by default.
Using LCD/Keypad:
From status display mode do the following: Press "ENTER" to enter setup
mode → select "Loopbacks" → select "RFloopback ON" → select "Yes".
Please refer to Chapter 4.4.1 to find out how the RF loop test is set from the Web
terminal.
Note: before setting the radio loop, the transmitter power should be switched to
maximum level.
The operational capacity of the radio channel can be roughly rated by the indications
of the frame error counter (FrmErr) which counts the faulty frames from WAN within
the time interval equal the sum of up-time and down-time.
Modular Fast Ethernet Bridge Management System Technical Description and Configuration Guide
V. 3.12. 1.0 · © SAF Tehnika A/S 2003
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