G22
Test Interface for two channel frequency response, gain phase measurements with differential input channels for the Alpha-A Modular Measurement System
The G22 extension test interface for the Alpha-A modular measurement system features high quality general purpose frequency response or gain phase measurements.
G22 measures the amplitudes and phase shift V1high-V1low and V2high-V2low of two voltage channels. It has similar functionality to a dual input channel lock-in amplifier with improved accuracy and extended frequency range.
G22 can not be used for dielectric, conductivity or impedance measurements.
G22 Short Specification
| Ranges | |
| Frequency | 3 μHz ... 20 MHz (12.5 decades) * |
| AC signal out> | 100 μV .. 3 Vrms> |
| DC bias out> | −40 VDC .. +40 VDC, 70 mA max ** |
| Signal
generator output impedance |
50 Ω |
| Voltage in | < ± 4.3 Vp dc or ac coupled |
| Differential Voltage Inputs with Driven Shields | |
| Input impedance | 1012 Ω | 10 pF |
| Common Mode Rejection | < 10-4 below
100 kHz < 10-3 dB below 1 MHz |
| Input Bias Current | < 2.10-12 A |
| Basic Accuracy | |
|
Voltage ratio V2 / V1 |
< 3.10-5 *** |
| Phase Angle | < 2 m° *** |
| Resolution | |
|
Voltage ratio V2 / V1 |
< 10-5 |
| Phase Angle | < 0.6 m° |
* in combination with the Alpha-A mainframe types AN, AT
** requires dc bias option B of the Alpha-A mainframe
*** for details refer to specification charts