５
MEASUREMENT OPERATION
On WinSPM, set the time constant within the range of 5 ms to 500 ms.
ef. Phase
In order to use the detection operation on the
5-254
TMPM5200-2
Setting
This sets signal inputs for the lock-in amplifier.
y
ossible value unless the input signal becomes
the detection operation.
•
R
lock-in amplifier, you must make
equal the phases of the reference signal and input signal. You use this control to
°
from the current
.
e output signal. Similarly, if 3F is set, the lock-in amplifier
tputs the 3
ω
component, which has a triple period.
ut signals from the lock-in amplifier. Since the lock-in ampli-
fier can output two kinds of output signals, set two signals in pairs.
If you select Acos/Asin, the detection signals in the lock-in amplifier are decom-
posed and output into the cos component and sin component, respectively.
If you select Mag/Phase, the amplitude and phase of the detection signals in the
lock-in amplifier are output.
•
Auto Sensitivity
When you click on this button, the lock-in amplifier sets an appropriate input
sensitivity for the current input signal by using the automatic sensitivity adjusting
function of the lock-in amplifier. However, if the amplitude of the input signal
changes after you had adjusted the sensitivity, you must readjust it.
•
Auto Phase
Just the same as Auto Sensitivity, when you click on this button, the lock-in ampli-
fier sets an appropriate reference phase so that the reference phase agrees with the
input signal phase by using the automatic phase adjusting function of the lock-in
amplifier.
•
Sensitivit
This sets signal-input sensitivity for the lock-in amplifier. The signal-input sensitiv-
ity determines the signal amplitude that can input into the lock-in amplifier. How-
ever, if you set too large sensitivity, output-signal precision from the lock-in
amplifier
decreases.
Usually, change the setting from a large value to a small value
during use, and set the largest p
saturated.
On WinSPM, set the input sensitivity within the range of 100 nV to 1 V.
•
Time Constant
Set a time constant when you perform a detection operation on the lock-in amplifier.
The smaller the time constant, the higher the frequency signal at which you can
perform
adjust the phases of these signals. By clicking on the Set button, you can set the
phase of the reference signal in the range of
±
180
°
. Moreover, if you click on the
+
90 button, the reference signal is set at the phase rotated 90
phase
•
Ref. Frequency
For the frequency of the reference signal, set the frequency component of the input
signal that you want to detect and output. Let the period of the reference signal be
ω
,
if F is set, the lock-in amplifier locks and outputs the
ω
component of the input
signal. If 2F is set, the lock-in amplifier outputs the 2
ω
component, which has a
double period, as th
ou
•
Output
Set the kinds of outp
