CHAPTER 10: Keypad Lock
Overview
Many of the operations such as alignment and channel change are carried out using the front panel’s keypad,
therefore the CS-540 incorporates a simple keypad lock to prevent unwanted manipulation of the CS-540’s
settings during operation at the site. The keypad can be locked and unlocked in any one of the three
operating modes. While not a sophisticated lock, it can prevent someone who is not aware of the CS-540’s
operation from tampering with the unit’s settings.
Procedure
To lock the keypad, simply turn the volume control knob all the way counter clockwise and press-and-release
the MON button. The LOCK icon will be displayed on the LCD. The keypad is now locked and the UP, DOWN,
BASE, and AUX buttons are disabled. If not already on, the monitor feature may now be enabled by pressing-
and-releasing the MON button again. To unlock the keypad, turn the volume control knob all the way
clockwise and press-and-release the MON button. The LOCK icon will disappear and the keypad is now
unlocked. The monitor feature now works as normal. The locking and unlocking of the keypad can only be
done when the MON button is pressed when the volume control knob is at one its two extremes.
Chapter 11: Duplexer Installation
Overview
The CS-540 is designed to allow the installation of an optional internal duplexer. Because of the sensitive
nature of the internal components of the CS-540, we highly recommended that a skilled technician performs
this procedure.
Procedure
Follow the steps below to install an internal duplexer:
1) Disconnect the detachable AC cord from the CS-540. Power must not be applied during duplexer
installation.
2) Using a Philips screwdriver, remove the nine screws affixing the chassis top to the bottom chassis.
Using a 7/64” Allen wrench, remove the one socket head screw affixing the top of the chassis to the
front panel.
3) Carefully pull the chassis top off the chassis bottom and set the chassis top aside.
4) Looking inside the chassis bottom and to the rear, remove the screws connecting each panel mount N
connector from the rear of the chassis.
5) Using the screws from the RX/TX module’s N connectors, connect the panel mount N connector of the
antenna cable provided in the duplexer installation kit (BridgeCom Part #:08-01-001) to the duplexer
out port on the rear of the chassis.
6) Pick up the chassis top. Using the four screws and nuts provided in the duplexer installation kit,
attach the duplexer to the chassis top as shown in
Figure 11-1
on the next page. Make sure the nuts
are located on the duplexer side of the chassis and the screw heads are located on the topside of the
chassis top.
7) Attach an N-type male to BNC Male adapter to the receiver and transmitter ports of the duplexer.
8) Referencing
Figure 11-1
, connect the RX Module cable to the Receiver input and TX module cable to
the transmitter input of the duplexer.
9) Connect the BNC-male end of the recently installed cable to the antenna port of the duplexer.
10) Replace the chassis top carefully back on the chassis bottom with the duplexer being enclosed inside
the chassis.
11) Line up the holes of the chassis top with the chassis bottom. Connect the one socket-head screw
from the front panel to the chassis top and place one screw in the middle of the chassis rear.
12) Screw-in the remaining screws. Duplexer installation is now complete.
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