29
APPENDIX B
Bias Tee Installation Instructions
1.
Equipment Preparation.
a.
Mount TCR-BT-01-2 to the power amplifier as depicted in Figure B-2.
Note: The TCR-BT-01-2 Bias Tee is compatible with both the TCR-MBA-50 and
TCR-MBA-50 WB.
b.
Connect the antenna to the appropriate port on the PA (SAT, LOS or WB).
c.
Connect RADIO jack on TCR-BT-01-1 to the appropriate radio RF input/output
port as depicted in Figure B-2.
d.
Ensure DC power source (28 VDC recommended) is turned off and connect it to
the DC INPUT jack on the TCR-BT-01-1 (see Note 1 below for more information
regarding DC input). Refer to Figure B-1 for DC Power cable pinout.
e.
Connect the coax cable between the two N connectors on the TCR-BT-01-1 and
TCR-BT-01-2.
2.
Operation.
a.
Turn on the DC power source and verify that the DC INPUT LED illuminates on
TCR-BT-01-1 and that DC ON at both Bias Tee ends is OFF.
b.
Press and hold the power button on TCR-BT-01-1 until DC ON illuminates (2-3
seconds).
c.
Verify that DC ON at TCR-BT-01-2 is also illuminated.
d.
Verify that the power amplifier is ON and select the appropriate mode of
operation and power level.
e.
Turn on the radio and select the appropriate channel for operation.
f.
Key the radio and observe that the TX light on the TCR-BT-01-1and on the power
amplifier illuminate.
g.
Refer to Table B-1 for system troubleshooting in the event that any of the steps
above fail to provide the normal indication.
NOTE: The TCR-BT-01-2 is wired for auto start and 28 VDC operation for the TCR-MBA-50
(both versions). The PA will still operate at voltages as low as 12 VDC; however, the current
limiting function for battery or commercial vehicle operation will not be enabled and the PA will
try to TX at higher power levels, up to 50 watts (mode dependent). This will draw higher than
normal current and could potentially trip the overcurrent protection on some batteries, such as
the BA-5590.