Tait TB9300, Инструкция по установке и эксплуатации, Страница: 109 / 138

TB9300 Installation and Operation Manual
Replacing Modules 109
© Tait Limited March 2016
8.4 Replacing a Power Amplifier
Notice
Before removing a PA, disconnect the DC input and RF input
first, followed by the RF output. After refitting the PA, reconnect the RF
output first, followed by the RF input, and then the DC input.
Removal
1. If you have not already done so, carry out the instructions in “Pre-
liminary Disassembly” on page 105 .
2. At the front of the PA, unplug the DC input cable
b
and the RF input
cable
c
, and move both cables to one side. Unplug both ends of the
system control bus cable
d
and remove it.
3. At the rear of the PA, unplug the RF output cable.
4. Loosen the screw securing the retaining clamp(s)
e
and rotate the
clamp(s) through 90° to clear the module.
5. Slide the PA out of the subrack, taking care not to damage any of the
cables.
Refitting
1. Slide the replacement PA into the subrack and secure it with the
retaining clamp(s).
2. At the rear of the PA, connect the RF output cable.
3. At the front of the PA, connect the RF input cable, followed by the
DC input cable.
4. Reconnect all the other front and rear panel cables previously
disconnected. Ensure the front panel cables are positioned correctly,
and retained where required by the cable retaining clips in the top of
the subrack (refer to
“Appendix B – Inter-Module Connections” on
page 119 ).
5. Tighten the nut on the SMA connector to a torque of 5lbf·in
(0.6N·m).
b e
d
c b
b
d
d e c
e
e
(obscured)
50W PA 100W PA