Harris Atlas DVL400, Technical Manual

Page: 153 / 180

2/25/03 888-2473-001 5-7
WARNING: Disconnect primary power prior to servicing.
Section 5 Maintenance and Alignments
ATLAS Series™
5.5 Power Calibrations
Other than for installation, power calibration should only be required if the
controller containing the calibration settings is replaced, or if a directional coupler is
replaced. However, calibration is very simple and can be done whenever it is
deemed necessary. The only required power calibrations are:
a.
PA Cabinet Forward Power (before combiner and filter)
b. PA Cabinet Reflected Power (before combiner and filter)
c. Total System Forward Power (after combiner and filter)
d.
Total System Reflected Power (after combiner and filter)
To access the Output Setup screen use the following key presses:
Figure 5-5 Output Setup Screen, Power Calibrations
Tools required:
•
Precision Directional Couplers (precision meaning that the coupling ratio
has been measured at the exact operating frequency).
•
Digital power meter with power probe
NOTE:
Forward and Reflected power calibrations should only be done while operat-
ing the transmitter into a known good load or a low VSWR antenna system.
Key Presses