Pease note that 100% should be the maximum FWD power. Typically, customers run
the systems at 90% to avoid occasional AC power line spikes or transients from tripping
the shutdowns. The difference of 10% will provide a marginal difference in range (tower
height will have a much more significant effect on range in the case of over-the-air) or
cavity excitation.
9. Verify that the power supply reads correctly (see supplied final inspection sheet for factory settings
of power supply levels) on the display of the power amplifier. You should see no more than 3%
fluctuations in DC supply voltage, and even less with a properly conditioned AC source to the
power supply.
10. Look at the transmitted output using suitable test equipment. If the output quality is unsatisfactory,
check the input signals, connections to the antenna system, antenna and transmission line
VSWR, and the physical condition of the antenna.
11. Select the appropriate input from the FM Controls screen on the front panel.
12. Adjust the attenuation for the input if needed from the Audio Levels screen on the front
panel. Check the modulation level on the main RF Display or FM display on the front panel.
13. After warm up, compare the temperature of the equipment from the front display to the
temperature recorded in the final inspection sheet, included in shipping. Assuming ambient
temperatures are close (our factory is typically around 18 to 25˚C), your temperature reading
should be very close to the factory reading. Use your temperature measurement as a method to
monitor fan performance (though on higher power units, fan current is also monitored). A fan
failure or air blockage will show an increase in temperature, assuming ambient temperature is not
varying.
For FM broadcast applications, if the quality of transmission is unsatisfactory, the difficulty is often with
the receiving antenna or with obstructions in the path between the amplifier/antenna and receiver. There
is also a troubleshooting section located later in this manual.
At this time, Technalogix recommends that you document your measurements to use as a reference over
time. The measurements can be made either from the front display, or remotely via the Remote Port
(DB25), Ethernet (lower RJ45), or SNMP (lower RJ45), whose operation is explained in the Monitor and
Control System sections.
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