Harris Atlas DVL400, Technical Manual

Page: 77 / 180

2/25/03 888-2473-001 3-17
WARNING: Disconnect primary power prior to servicing.
Section 3 Operation
ATLAS Series™
3.6.3.2 PA Module Alignment
This screen is accessed by pressing the "PA Align" button in Figure 3-17. This
screen allows the bias on the individual PA module pallets to be optimised. This
procedure should only be done after the transmitter has been operating at nominal
power output, in an average ambient temperature, for at least 20 minutes.
NOTE:
Transmitter carrier power will be removed for about 5 seconds. However,
lock up times on receivers may be as much as 3-5 seconds after that. There-
fore, it is not recommended that this procedure be done during regular broad-
cast hours.
This procedure should be done once a month for the first 6 months of
operation and then once every 6 months after that.
Figure 3-19 PA Module Alignment Screen