Harris Atlas DVL400, Technical Manual

Page: 82 / 180

3-22 888-2473-001 2/25/03
WARNING: Disconnect primary power prior to servicing.
Section 3 Operation ATLAS Series™
3.7.3.2 Output Setup
This screen is accessed by pressing the Output Setup button on the Output Service
screen in Figure 3-23. It is used to calibrate PA Cabinet and Total System Forward
and Reflected power. For a detailed calibration procedure refer to "5.5 Power
Calibrations" on page 5-7.
It also calculates the VWSR protection thresholds of Foldback power and Fault
threshold and displays them at the bottom of the screen. These values are based on
the "Nominal Power Output" value entered into the System Setup screen in Figure
3-38 on page 3-33.
•
The foldback level is calculated using a VSWR = 1.4:1. Therefore the
actual foldback power can be calculated as:
Foldback Power = Nominal Power Output x 0.0278
•
The fault threshold is calculated using a VSWR = 1.9:1. Therefore the
actual fault threshold can be calculated as:
VSWR Fault Threshold = Nominal Power Output x 0.0963
Figure 3-25 Output Setup Screen