SDX-1239 Operating Instructions
Rev - 3/21/2017
Page 8 of 22
Indicator LED’s
There are 4 LED’s on the SDX-1239 front panel as shown in figure 1.
The Power LED is illuminated whenever an external supply is plugged into the DC
power jack.
The Trigger LED illuminated when the SDX-1239 is triggered. This LED functions at all
times, whether the SDX-1239 is armed or not.
The Armed LED illuminated when the unit has been armed for data collection. Note that
the unit can be armed even if no triggers are present.
The Out of Range LED illuminates when the internal ADC detects a voltage outside of its
measurement range. This LED is only updated when the unit is armed and triggered.
USB
The SDX-1239 communicates with the host PC via a USB port. The device supports full
speed USB 2.0. The host P.C must have the Mach 6 USB drivers installed. These drivers
are on Gentec-eo website. The USB cable can be unplugged from the SDX-1239 during
operation at any time, but the applications software will not function in this state other
than to wait for a SDX-1239 to be connected to the USB.
AOM Voltage
The AOM Voltage Output provides a buffered signal from the SDX-1239. The range is
0V to 1V. In Measure and Monitor Mode, this voltage is set via USB commands. In
Control mode, this voltage is set by the SDX-1239 to minimize the error between the
target energy and the measured mean energy.
Energy Voltage
The Energy voltage is set by reading the valve of the voltage on the BNC. The input
range is 0V to 10V. 0V represents 0% of the set scale, and 10V represents 100% of the
set scale.
ARM Control
SDX-1239 will arm for measurements when this signal is set to 3V (TTL compatible) or
higher. The ARM Control signal is tested at the AOM update rate. This will be 10Hz to
10kHz