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2) Use a compensation junction.
1.12
Aux In
There are four 16-bit high-precision AUX-ADC input channels in SE1022D. The input voltage ranges from - 10 V to + 10
V and the minimum resolution is 0.3 mV. These 4 ADC channels can clamp the input signal and amplify the internal
differential signal. The input impedance is 1 M
Ω
. At the same time, they can pick up signals to measure slow analog
signals or DC signals (the signals come from temperature sensor and pressure sensor). This is useful for proportional
operation and transferring data to computer.
Because of the internal special structure of the 4 AUX-ADC channels, the measurement result is about 2.048V when the
input is floating.
1.13
Sweep Frequency and Amplitude of Signal Generator
The SE1022D adds some new functions, such as frequency and amplitude scanning. Signal generator can scan the output
amplitude and frequency. Uses can sweep the frequency they interested in and analyze the characteristics of the signal.
This function greatly increased the actual application.
The basic way of frequency and amplitude scanning is setting the value of the start and end point, and increasing the value
by step and then the scan is over. See more details in the sections related to frequency and amplitude scanning.
1.14
Multi-harmonic Detection
Harmonics represent waves at multiple frequencies. Periodic function can be described as the linear combination of one
constant and many sine or cosine functions with the base frequency and the multiple frequencies. The constant is the DC
component. The base frequency component is the base wave. The multiple frequencies are harmonics.
Now many other lock-in amplifiers can only measure one base wave or one component of harmonics at one time. But in
most practical applications, it is necessary to measure and record multiple harmonics simultaneously. In order to solve this
problem, SE1022D realized multi-harmonic detection. Up to 3-channel harmonic components can be measured by one
SE1022D at the same time.
Configuration of multi-harmonic detection can be edit through the following approach: [REF/PHASE]->[Harmonic].For
more details, see [REF/PHASE] submenu.
