Technalogix TAUD-100, Operating Manual

Page: 93 / 97

Technalogix Ltd
IX-2
9. The front display shows the user the present status of the amplifiers. Adjust RF output power to
desired level. Verify that the FWD Power reads 80 to 100% of the system’s rated power on the
PA enclosure - depending on the modulation of the signal content. The system is set up for
100% rms 8VSB power, unless otherwise specified. A typical data signal with QAM64 or DVB
will show differently. The output power level can be adjusted from the power amplifier’s RF
Levels screen. Keep in mind that the system will fold back or shut down (depending on severity)
should the forward RF output power level be exceeded.
10. Ideally, the RFL Power should read zero. However, should a high VSWR be detected, the
system will automatically fold back or shut down and cycle as previously described in the control
system section.
11. 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.
12. Look at the transmitted output using a suitable monitor. The picture and sound quality should be
clean and sharp. If the output picture and sound quality is unsatisfactory, check the input
signals, connections to the antenna system, antenna and transmission line VSWR, and the
physical condition of the antenna.
If reception problems are encountered, and the quality of transmission is satisfactory, the difficulty is
often with the receiving antenna or with obstructions in the path between the transmitter/translator
and receiver. It is important to ensure that the transport stream has not been divided up into too
many sub-channels. This will likely cause “pixeling” during fast frame changes like sports and
movies in the case of broadcast video transmission.
Assuming the previous installation instructions have been completed and cautions noted, and the
power amplifier is ready to receive a properly modulated digital signal, proceed with the following
steps to place the system in operation. The power amplifier has been factory aligned for channel
frequency (per system specification), signal levels and optimum performance.