Filter
Top Products
2-31
AUX OUTPUTS and INPUTS
This measurement is designed to illustrate the use of the Aux Outputs and Inputs on the rear panel. You will
need BNC cables and a digital voltmeter (DVM).
Specifically, you will set the Aux Output voltages and measure them with the DVM. These outputs will then be
connected to the Aux Inputs to simulate external DC voltages which the lock-in can measure.
1. Disconnect all cables from the lock-in. Turn
the power on while holding down the [←]
(backspace) key. Wait until the power-on tests
are completed.
2. Connect Aux Out 1 on the rear panel to the
DVM. Set the DVM to read DC volts.
3. Press [AUX OUTPUTS]
Press <Voltage>
Press [1] [0] [ENTER]
Press [-] [5] [ENTER]
4. Press [DISPLAY/SCALE]
Press <Monitor> to select Input/Output.
When the power is turned on with the backspace
key depressed, the lock-in returns to its default
settings. See the Default Settings list in the Menu
section for a complete listing of the settings.
The 4 Aux Outputs can provide programmable
voltages between -10 and +10 volts. The outputs
can be a fixed voltage or they can sweep with the
scan.
Display the Aux Output menu.
Highlight the output voltage of Aux Out 1.
Change the output to 10V. The DVM should dis-
play 10.0 V. The knob can also be used to adjust
the voltages.
Change the output to -5V. The DVM should dis-
play -5.0 V.
The 4 outputs are useful for controlling other
parameters in an experiment, such as pressure,
temperature, wavelength, etc.
Show the Display and Scale menu.
Change the monitor display at the top of the
screen to show the Aux Inputs (A1, A2, A3 and
A4).
The Aux Inputs can read 4 analog voltages. These
inputs are useful for monitoring and measuring
other parameters in an experiment, such as pres-
sure, temperature, position, etc.
We'll use Aux Out 1 to provide an analog voltage
to measure.
Aux Outputs and Inputs