User's Manual

68P81093C75-A 9-31

4. Tilt the chassis up on its back edge; then, from the bottom of the

chassis, remove the six Phillips screws holding the Exciter’s

mounting plate. Slide the mounting plate out of the front of the

chassis.

5. Pull out the old Exciter Module by gripping behind the mini-

UHF connector and pulling gently.

6. Insert the new module. Make sure it is ﬂat on the bottom of the

chassis. Push it ﬁrmly into the chassis until it seats into the card-

edge connectors on the backplane. (Do not slam the board

against the backplane or push any harder than necessary to seat

the connectors.)

7. If desired, power up the station while it is still out of the case to

make sure the module is securely in place. If the LEDs do not

light, are dim, or ﬂash rapidly, one or more modules are not

seated properly. Unplug the station before continuing to the

next step.

8. Reassemble the station by reversing Steps 2 through 4.

After Installing the New

Exciter Module

Perform the following alignment procedures as described in the RSS

User’s Guide (part number 68P81085E35):

• Tx Deviation Gain Adjust

• Reference Modulation

For ASTRO Simulcast systems only:

• ASTRO/Simulcast Launch Time Offset

Intermediate Power

Ampliﬁer (800 MHz

Stations only)

Physical Replacement

of the IPA

1. Turn off the station’s power by unplugging the AC and DC

power cords from the top panel.

2. Remove the eight Phillips screws form the edges of the station’s

top panel and lift the chassis out of the case.

3. Tilt the chassis up on its back edge; then, from the bottom of the

chassis, remove the six Phillips screws holding the Exciter’s

mounting plate.

4. Disconnect the coaxial cables running to each end of the IPA

module. Also disconnect the 3-pin connector at the rear of the

IPA module. The Exciter mounting plate may need to be

partially extracted from the chassis in order to remove the

cables.