User's Manual

Appendices
E1 Spread Spectrum Radios
10-18
10.9 Troubleshooting
10.9.1 Can Not Establish a Link
If your E1 radios can’t link each other perfectly and display no green light on IDU, please find the following
steps for troubleshooting.
Step1: Check the physical connection from IDU to antenna of both sides if any connector is loosened or
improper connected. Please refer to section 10.7 for further information.
9 We suggest that the cable between IDU and ODU should be the one we attached in our package.
9 As for the signals come from the ODU are high frequency ones, we suggest customers use low-loss
high-frequency cable such as LMR-900 to maximize the distance between two sides.
Step2: Check the Rx LED on the ODU or Rx/Tx reading on the IDU. We suggest that if the Rx reading is lower
than -60dB, then it has great possibility that you encounter RF problem. You could take following measures in
order to verify the situation.
Step2.1: There is possibility of wrong antenna angle toward each other. Please adjust your antennas to
the correct angle.
Step2.2: There is possibility of air interference. Please switch your RF channel to another available one
of both sites.
Step3: Check the configuration. Please find the following configurations are correct or not by using whether
LCD panel or telnet utility.
Item Location of LCD Location of Textmenu Configurations
RF Channel ODU Info/RF-CH(Section
5.2.2)
Terminal/ODU(Section 8.2.1) This setting should be the
same as remote site.
Power of Tx ODU Info/TxL-SET(Section
5.2.2)
Terminal/ODU(Section 8.2.1) This setting should be set to
be maximum value such as
22.
SSPA ODU Info/SSPA(Section
5.2.2)
Terminal/ODU(Section 8.2.1) This setting should be set to
be ON.
Link ID Link Info/Link ID(Section
5.2.8)
Terminal/Link(Section 8.2.3) This setting should be the
same as remote site.
Step4: Please conduct loopback tests to verify if the system is broken or not by following order. Please refer to
section 5.2.3 and section 8.2.13 for detail operation. If any of the following items fails, then contact us to start
RMA procedure.