4.2 F
UNCTIONS
IN
THE
M
ENU
L
INE
4.2.1 F
ILE
Exit
- Exit the program
4.2.2 O
PTION
•
overload
Overload occurs, when the dc input signal exceeds the full scale sensitivity for the selected range.
This full scale sensitivity is 7 V
rms
for high reserve, 700 mV
rms
for normal reserve and 70 mV
rms
for
low reserve. With this option can be selected whether a beep and/or a color change is shown in
case of overload.
•
ext. reference
For LockIn-amplifier versions with PLL (Phase locked loop), the reference frequency can be either
the internal oscillator frequency or an external reference frequency. If the “ext. reference” is
selected, the internal PLL is enabled. The locked frequency is shown in grey in the frequency
window. If there is no input signal connected to the reference input, a default frequency of 2 mHz
is shown, but the LockIn is not working properly.
With disabled PLL, the frequency given in the frequency window is written in black.
4.2.3 V
IEW
It can be selected, which of the meters is shown.
•
Devices
Select whether the strings for the lockin amplifier(s) should be shown. Useful when using multiple
lockin amplifiers to select which one should be used. Is also used for LabView (see chapter
“
Multiple LockIn Amplifiers in LabView
“).
4.2.4 H
ELP
“About”
– shows the current program version and the version of the used hardware driver
“LockIn help”
– calls the table of contents of the HTML help file supplied with the program
“Help as PDF”
– calls the current manual (Manual.pdf) and opens it in the Microsoft Internet
Explorer
4.3 F
UNCTIONS
IN
THE
F
UNCTION
L
INE
4.3.1 F
REQUENCY
S
WEEP
Opens the "
" window
4.3.2 O
SCILLOSCOPE
The oscilloscope works like a real 3-channel-oscilloscope. Content, scaling type and offset of the
three channels is selectable.
Manual Anfatec PCI-Lockin Amplifier AMU2.4 – Rev. 1.10 dated 30/09/20
Page 16 (70)
