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.
V
IEW
It can be selected, which of the meters is shown.
H
ELP
About
– shows the current program version.
LockIn help
– calls the table of contents of the HTML help file supplied with the program
Help as PDF
– calls the current manual (AMU24_Manual.pdf) and opens it in the Microsoft
Internet Explorer.
F
UNCTIONS
IN
THE
FUNCTION
LINE
S
WEEP
FREQUENCY
Opens the "
" window
S
WEEP
BIAS
Opens the "
" window
Manual Anfatec PCI-Lockin Amplifier AMU5.0 – Rev. 1.01
Page 16 (34)
