Specifications

5/2/2013 888-2500-001 5-11
WARNING: Disconnect primary power prior to servicing.
Section 5 Maintenance and Alignments
DAX-1/DAX-3
5.5.2.2 Reflected Power Setting
The procedure continues below, now focusing on reflected power calibration and
VSWR protection setting:
STEP 8 Turn Reflected Power Trip potentiometer, R56 on the Exciter/Controller
board, fully clockwise (CW)
STEP 9 On the VT100 page 5, press “I” and raise the Reflected Power Trip to
800W (for all DAX transmitters) using the up arrow key
STEP 10 Using the front panel LOWER control, lower the transmitter power until
the GUI forward power meter indicates 100W per PA (see Table 5-3
below)
STEP 11 Set the transmitter for Reflected Power Calibration mode by moving S1-
1 on the Output Monitor board (bottom switch) to the right. The red
LED just below S1 will illuminate (If the transmitter trips off, verify that
the Reflected Power Trip in the VT100 is set to 800W, and that R56 on
the Exciter/Controller is turned fully CW).
STEP 12 On the VT100 page 5, enter the Reflected Power Cal. value by pressing
“5” and then typing the power, in Watts, set in STEP 10 above
STEP 13 Press <ENTER> to store the now-calibrated Reflected Power Cal.
setting
STEP 14 Set the Reflected Power Trip point using R56 on the Exciter/Controller
board:
•Rotate R56 CCW until the transmitter faults
•Back R56 CW ¼ turn until the transmitter no longer faults (you may
have to press the ON button again if the transmitter 3-strike faults OFF
during the adjustment)
STEP 15 Return the Output Monitor to normal operating mode by switching S1-1
back to the left (red LED will turn off)
Table 5-3 STEP 10 Power Settings
Model Watts
DAX-1/1R 100
DAX-3 300
DAX-5 500
DAX-6 600