78 Maintenance TB7300 Installation and Operation Manual
© Tait International Limited December 2022
6 Maintenance
The base station is designed to be very reliable and should require little
maintenance. However, performing regular checks will prolong the life of
the equipment and prevent problems from happening.
It is beyond the scope of this manual to list every check that you should
perform on your base station. The type and frequency of maintenance
checks will depend on the location and type of your system. The checks and
procedures listed below can be used as a starting point for your
maintenance schedule.
Performance
Checks
We suggest you monitor the following operational parameters using the
web interface:
■ VSWR
■ DC input voltage, especially on transmit
■ Any temperature alarms
■ Forward power
These basic checks will provide an overview of how well your base station
is operating.
Calibration We recommend that you calibrate the base station after three months of
operation, and then annually for H band reciters, and every three years for
B band reciters. The calibration procedure is described in the Help
(Calibrate > Calibrate > Internal reference), and requires a calibrated
frequency generator - a GPS-derived frequency reference is recommended.
DC Input We suggest that you periodically check that the screws on the DC input
terminals are tightened to the recommended torque of 1.3lbf·in (1.7N·m).
They may work loose with thermal cycling. Also, if you are using battery
back-up, you should check the batteries regularly in accordance with the
manufacturer’s recommendations.
Ventilation The base station has been designed to have a front-to-back cooling airflow.
We strongly recommend that you periodically check and maintain the
ventilation requirements described in “Equipment Ventilation” on page 55
to ensure a long life and trouble-free operation for your base station. Also
check for a build-up of dust in and around the front panel air intakes and
fan ducts.
Cooling Fans The cooling fans have a long service life and have no special maintenance
requirements.
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