Harris Maxiva ULX, Technical Manual

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2-54 888-2629-200 10/6/10
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation
Maxiva ULX COFDM Series
2.14.2 Setting Exciter Parameters
See M2X Exciter manual to set exciter parameters.
NOTE:
Exciter A is always factory installed as the upper exciter unit in the exciter con-
trol cabinet. The optional exciter B is installed immediately below the top exciter
unit (see layout photo Figure 1-1 on page 1-2).
2.14.3 RF Initial Turn ON
!
CAUTION:
THE TRANSMITTER SHOULD BE INITIALLY POWERED INTO THE TEST LOAD.
STEP 1
Press OUPUT then OUTPUT METERS. This screen shows (Figure 2-
17 on page 2-56) the forward and reflected powers for the Cabinets and
Total System power. The ALC level is also indicated.
STEP 2
Set Cab Fwd Power Reference (W), on Ouptut screen, to zero by
entering the value or by entering the zero value or by holding the
lower button (with ALC on) for at least 20 seconds.
STEP 3
Turn down the transmitter ALC voltage level prior to initial start
up. Press MAN button on the TCU control panel for at least for at least
5 seconds. Then hold down the LOWER button on the TCU control
panel for at least 20 seconds. This assures that the transmitter will come
on at a low RF output level.
STEP 4
Switch ON the IPA (driver) and PA circuit breakers IPA A-B and PA
slots 1-8 and 11-18 (the number of PA modules depends on the
transmitter model) inside the cabinet rear on the left side (refer to
Figure 2-11 on page 2-45).
STEP 5
Verify that the PA cabinet has Remote Enabled.
STEP 6
Press the transmitter ON button .
STEP 7
Verify that the cabinet and system reflected power levels are under
100 watts (see Output screen) .