NuPower
TM
LS75T01 User Manual
Rev -
Grounding the pin (i.e. a voltage below +0.2 VDC) places the unit in
transmit
mode. The user can either
connect the RF Enable line to pins 1, 2, 6 & 8 on the CTRL/PWR interface connector, or an open drain
logic line capable of sinking 500
µ
A to place the unit in
transmit
mode.
4.5
TEMP FLAG
This signal is an output to indicate an over-temperature condition in the NuPower LS75T01. A logic high
(+5 VDC) indicates normal operation, while a logic low (0 VDC) indicates an over-temperature condition.
The NuPower LS75T01 incorporates internal logic circuitry that turns off the DC bias to the RF
transistors.
Caution: The amplifier should be shut down and allowed to cool off when the over-
temperature flag is set low to avoid damage to the module.
Do not connect the Temperature Flag to DC Power (+28 Volts input). The Temperature Flag
can be used to monitor thermal shutdown
