Specifications

5-10 888-2500-001 5/2/2013
WARNING: Disconnect primary power prior to servicing.
DAX-1/DAX-3
Section 5 Maintenance and Alignments
5.5.2.1 Forward Power Setting
The goal here is null the reflected power circuit by using the dipswitches and
potentiometer on the Output Monitor board:
STEP 1 Turn on the transmitter and raise
power until the DC current reaches 5
Amps for DAX 5/6 (1 Amp for a
DAX 1/3) according to front panel
GUI meter
STEP 2 Clip a DC Voltmeter to TP1 on the
Output Monitor board (shown at
right) at the upper rear of the
transmitter and begin with the
dipswitches all set to the left
STEP 3 Try to locate a null point (a minimum
voltage) within the range of the pot
NOTE:
If there is no null point (i.e. the lowest point is at the end of travel of the pot), flip
dipswitch S-2 (second up from the bottom) to the right, and try to locate the null
again. If there is still no null, flip dipswitch S-3. If there is still no null, flip dip-
switch S-4. Once the null is located, center the potentiometer in it.
STEP 4 Set the transmitter to the highest power range setting (typically Power
Level 5), and zero the power setting by simultaneously holding the
RAISE and LOWER buttons for greater than 3 seconds
STEP 5 Using the front panel RAISE control, raise transmitter output power
back up until your external RF current or Watt meter indicates a value
that corresponds to the nameplate output power
STEP 6 On the VT100 page 5, press “3” and then type in the power in Watts,
from in STEP 5 above
STEP 7 Press <ENTER> to store the now-calibrated Forward Power Cal. setting
Table 5-2 STEP 5 Nameplate Power Settings
Model Watts
DAX-1/1R 1000
DAX-3 3000
DAX-5 5000
DAX-6 6000
DIPSwitch (S1)
Testpoint 1 (TP1)
Potentiometer (R23)
S1-4
S1-3
S1-2
S1-1: Test = Right
LED (DS1):
Test = Red