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Section 4, Trouble Shooting Guide
TRACER 2210/3202 System Manual
52
© 2001 ADTRAN, Inc.
61280012L1-1A
8. Resolve all RF coaxial cabling errors before proceeding.
9. Attach the RF coaxial cables to a 5.8 GHz attenuator, if possible. If you do not have an attenuator,
attach the coaxial cables to the antennas to be used in the permanent installation. If the installation
antennas are not available, small, inexpensive dipole or patch antennas can be used for verification
purposes. If an adjustable attenuator is being used, dial in the amount of attenuation that
corresponds to the path loss value expected for the microwave link in which the TRACER
hardware will be installed. The path loss value can be calculated from a knowledge of the path
length, or provided by a path study. Remember to subtract both antenna gain values from the
attenuator level if these values have not already be accounted for.
antennas are not available, small, inexpensive dipole or patch antennas can be used for verification
purposes. If an adjustable attenuator is being used, dial in the amount of attenuation that
corresponds to the path loss value expected for the microwave link in which the TRACER
hardware will be installed. The path loss value can be calculated from a knowledge of the path
length, or provided by a path study. Remember to subtract both antenna gain values from the
attenuator level if these values have not already be accounted for.
10. After setting up the RF pieces, examine the RFDWN light on the front panel of each 2210 unit. If
the RFDWN light is illuminated (red), the corresponding 2210/3202 is not receiving a suitable RF
signal from the other 2210/3202 pair. In this case, the receiving 2210/3202 is either receiving a
very weak signal, or no signal at all. If the RFDWN light is not illuminated, then the 2210/3202
units are receiving a suitable RF signal. Suitable RF power levels for low error rate
communication will range from -30 dBm to -87 dBm measured at the N-type connector input at
the base of the receiving 3202 unit.
signal from the other 2210/3202 pair. In this case, the receiving 2210/3202 is either receiving a
very weak signal, or no signal at all. If the RFDWN light is not illuminated, then the 2210/3202
units are receiving a suitable RF signal. Suitable RF power levels for low error rate
communication will range from -30 dBm to -87 dBm measured at the N-type connector input at
the base of the receiving 3202 unit.
11. Resolve any signal level issues before proceeding.
12. Examine the RFLOW light on the front panel of each 2210 unit. If this light is illuminated, then
the 2210/3202 is receiving a relatively weak signal, however if the RFDWN light is not
illuminated, the received signal is being suitably processed by the TRACER system. If you are
receiving a weak signal (RFLOW is lit), please verify that the weak signal is not being caused by a
faulty cable, an insufficiently tightened cable, or some other installation-related problem. Also,
make sure an unreasonably large attenuation value has not been selected if you are using an
attenuator on a work bench setup.
You can use the table in the Microwave Path Engineering section of this manual to select the
proper free-space attenuation value (in dB) based on the estimated length of the microwave path.
Remember to subtract out both antenna gains (local and remote) from the attenuator setting.
illuminated, the received signal is being suitably processed by the TRACER system. If you are
receiving a weak signal (RFLOW is lit), please verify that the weak signal is not being caused by a
faulty cable, an insufficiently tightened cable, or some other installation-related problem. Also,
make sure an unreasonably large attenuation value has not been selected if you are using an
attenuator on a work bench setup.
You can use the table in the Microwave Path Engineering section of this manual to select the
proper free-space attenuation value (in dB) based on the estimated length of the microwave path.
Remember to subtract out both antenna gains (local and remote) from the attenuator setting.
13. Command a FAR 2210 loopback on both 2210 units to verify end-to-end link integrity. Set TEST
PATTERN to 511 or QRSS and verify that no errors are occurring. This step will ensure that the
hardware being used in the TRACER link is adequately passing data and will be a viable wireless
data path for your DTE equipment.
hardware being used in the TRACER link is adequately passing data and will be a viable wireless
data path for your DTE equipment.
Installing/Configuring DTE Hardware
1. If possible, attach any or all of the intended DTE hardware to the 2210 units using the same work
bench setup. This step offers the perfect opportunity to configure your DTE hardware for proper
functioning with the TRACER hardware.
functioning with the TRACER hardware.
2. Determine the required data rate for the DTE hardware. Be sure to match this rate in the 2210 unit
using the CONFIG > V.35 menu selections. In nearly all applications, only the V.35 RATE setting
will need to be adjusted to match the DTE data rate, and not the V.35 TX CLK setting, which
should be set to AUTO.
will need to be adjusted to match the DTE data rate, and not the V.35 TX CLK setting, which
should be set to AUTO.
3. Resolve any remaining DTE-to-2210 configuration issues before field installation, if possible.
This will significantly reduce the probability of unsuccessful field installation.