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P a g e
possible issue simply turn the LNA operation off via front panel LNA Push Button
Switch selection.
2.3.3.3
Remote Operation
The TCR-MBA-75 NBT can be powered remotely using the Bias Tee I, the same
Bias Tee used with the AM-SAT-50 and AM-SAT 100 (See Figure 2-4). When DC
power is supplied from a conditioned 24-28 Volt source to the Bias Tee (circular Mil
connector), and the On/Off switch is in the On position, power will be routed to the TCR-
MBA-75 NBT via the RF cable that is attached between the Bias Tee (To Amplifier) and
Radio input connector on the amplifier (refer to figure 2-5).
To power on the TCR-MBA-75 NBT the ON/Off switch on the Bias Tee must be
in the On position and then the user must also press the ON/OFF button on the TCR-
MBA-75 NBT for approximately 2 seconds.
The Amplifier will power down if the RF cable (to the amplifier) is removed or if
the power at the Bias Tee input is interrupted. The unit will not automatically power on
when the RF cable (to the amplifier) or the DC at the Bias tee power is restored without
also pressing the ON/OFF button at the amplifier.
Figure 2-4. Bias Tee I for remote operation