9-10 MTR3000 Radio Frequency Distribution System (RFDS) Equipment: Basic Troubleshooting
3. Turn off the DC breaker, and/or pull the AC source power cord from the back of the base
station/repeater.
4. Remove the duplexer from the base station/repeater, as follows:
a. Label and disconnect the Rx output, Tx input, antenna output, and ground cables from the
duplexer.
b. Remove the four screws which secure the duplexer to the rack using a Torque
Driver T30 bit.
5. Install the duplexer to the rack, as follows:
a. Secure the duplexer to the rack using the four screws which were previously removed.
b. Reconnect the Rx output, Tx input, antenna output, and ground cables from the duplexer.
6. Restore power to the base station/repeater.
7. Enable the channel that is using the base station/repeater in the system with the duplexer.
9.4.1.3 External Dual Circulator Tray
1. Wear an electrostatic discharge (ESD) strap and connect its cable to a verified good ground.
This strap must be worn throughout this procedure to prevent ESD damage to any components.
2. Turn off the DC breaker, and/or pull the AC source power cord from the back of the base
station/repeater.
3. Remove the filter tray from the rack, as follows:
a. Label and disconnect the RF input, RF output, and ground cables from the tray.
b. Disconnect the Circulator Load temperature cable at the inline connector (which disconnects
it from the cable leading to the RF Peripherals port on the base station/repeater backplane
interface board).
c. Using a Torque
Driver T30 bit, remove the two screws which secure the tray to the rack.
d. Slide the tray out the front of the rack.
4. IF an individual External Dual Circulator module is replaced, perform the steps below.
Otherwise, proceed to Step 5.
a. Label and disconnect the RF input and RF output cables from the External Dual Circulator
module.
b. Unscrew the connector that secures the Circulator Load to the External Dual Circulator
module.
c. Remove the screws that secure the circulator baseplate to the tray.
d. Remove the circulator module including the circulator load module that extends beyond the
baseplate.
e. Place the new External Dual Circulator module in the tray in the same location and orientation
as the module which will be replaced.
f. Secure the new External Dual Circulator module baseplate to the tray using the screws
previously removed.
g. Connect the RF input and RF output cables to the new External Dual Circulator module.
h. Connect the Circulator Load to the External Dual Circulator module.
5. IF an individual Circulator Load is replaced, perform the steps below. Otherwise, proceed to
Step 6.
Note
Skip step 3(b) for the UHF band.
To Next Page
Loading...
Need help?
General
