User Manual – Rev BE    AMETEK Programmable Power 
MX Series  99 
4.1.3  Status Indicator Lights 
Four LED status indicators are located to the left of the display, and correspond 
to the following conditions: 
REMOTE\LAN  The REMOTE\LAN LED indicates that the unit is in 
remote-control mode. If the IEEE-488 interface is used, 
this indicator will be lit whenever the REM (REMOTE 
ENABLE) line is asserted by the IEEE controller. If the 
RS232, USB or LAN interface is used, the REMOTE state 
can be enabled by the controller using the SYST:REM 
command. Any time the REMOTE\LAN LED is lit, the 
front panel of the MX Series unit is disabled. There is no 
LOCAL button that allows the user to regain control of 
the front panel. This prevents accidental change of 
settings in ATE applications. 
OVERLOAD  The OVERLOAD LED indicates an output overload 
condition. This condition can be controlled by setting 
the current limit value in the PROGRAM menu. 
Removing the load using the OUTPUT ON/OFF button 
will recover from an overload condition. 
OVERTEMP  The OVERTEMP LED indicates an overheating problem 
inside the unit. This is an abnormal condition, which will 
cause the unit to shut off. Check the air openings to 
make sure they are not blocked. 
HI RANGE  The HI RANGE LED is on when the high voltage output 
range has been selected. 
To the left of these LEDs is a row of three Amplifier Fault LEDs, labeled A, B, 
and C, which correspond to the three Power (Amplifier) Modules located in the 
chassis from left to right, respectively. These LEDs identify which module has an 
active fault condition if a fault occurs. Section 5.7 provides details of the power 
modules.