Harris Ranger Series, Commissioning Manual

Page: 49 / 162

12/24/07 888-2685-001 2-23
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation Verification &
Ranger Commissioning Manual
2.11.2 RF Initial Turn ON
Shut the transmitter OFF. The transmitter should be initially powered into a test load.
Measure the test load impedance prior to application of RF power. The load can be
measured with a network analyzer prior to application of RF. Typical load VSWR
values are < 1.05:1 at the operating channel. If verification of load VSWR is not
possible then proceed with RF turn on at low levels and gradually increase power while
monitoring reflected power levels. If significant reflected power levels are noted then
measurement of the test load will be required.
Set the Exciter power to zero. This can be done using the lower button on the exciter
GUI or the Lower button on the transmitter control panel.
Switch ON the ac breaker on the front of the PA power supply. Monitor the Power
Supply screen shown in Figure 2-5 on page 2-13.
Press the transmitter ON button. Make sure the PA PS reading is close to 32Vdc.
Next, go to the Power Amp screen shown in Figure 2-12.
Figure 2-12 Power Amp Main Menu
Raise the transmitter power (or exciter power) slowly until about 50% nominal and
check the transmitter reflected and PA module reflected powers. The transmitter should
be operating normally with no faults indicated. Any faults should be corrected before
continuing. The power output bargraph on the top of the GUI screens will be yellow
until the power is 80% or more. Verify that the reflected power is under 10 watts.
Reflected Power
should be less
than 10 watts