This section mainly showed the basic function and specification comparison between Saluki STB8851 and Keysight E4990A Impedance Analyzer.
Saluki STB8851 Series Precision Impedance Analyzer is a new generation impedance test instrument by adopting the current international advanced automatic balance bridge principle. It is based on Windows 10 operating system, which realizes a fully computerized operation interface, making the measurement more intelligent and easier. STB8851 series surpasses the 120MHz frequency bottleneck of similar instruments, achieving the measurement frequency from 10Hz to 130MHz.
Keysight E4990A Impedance Analyzer has a frequency range of 20 Hz to 120 MHz. The equivalent circuit analysis function supports seven different
multi-parameter models and helps you to simulate your own equivalent parameter values of components.
Table 1 Comparison table between Saluki STB8851 and Keysight E4990A
| Brand | Saluki | Keysight |
| Model No. |
STB8851 | E4990A |
| Frequency Range | 10 Hz to 130 MHz | 20 Hz to 120 MHz |
| Impedance Parameters | |Z|, X, R, L, C, D, Q, |Y|, G, B, θ, Vac, Iac, Vdc, Idc, Rdc | |Z|, X, R, L, C, D, Q, |Y|, G, B, θ, Vac, Iac, Vdc, Idc |
| Measurement Terminal | Four-terminal pair | Four-terminal pair |
| Measurement Speed | Six-level, 0: 2.5ms, 1: 4ms, 2: 10ms, 3: 40ms, 4: 80ms, 5: 400ms | Five-level, f>50MHz: 3ms/point, f≤50MHz: 30ms/point |
| Highest Accuracy | 0.08% | 0.08% |
| AC Signal Source | 5mV – 2Vrms / 50uA – 20mArms | 5mV – 1Vrms / 200uA – 20mArms |
| DC Bias | 0V to ±40V / 0mA to ±100mA | 0 to ±40V / 0 to ±100mA |
| Functions | Test limit line, Crystal analysis, Curve track comparison | Test limit line |
| Output Impedance | 25Ω/100Ω | 25Ω |
| Sweep Parameter | Frequency, signal voltage/current, DC bias voltage/current | Frequency, signal voltage/current, DC bias voltage/current |
| Sweep Type | Linear, log, segment | Linear, log, segment |
| Number of measurement Points | 2 to 1601 | 2 to 1601 |
| Number of Channels | 4 | 4 |
| Equivalent Circuit Analysis | 3-element model: 4; 4-element model: 3 | 3-element model: 4; 4-element model: 3 |
| Interface | RS232C, USB HOST, USB DEVICE, LAN, GPIB, VGA, HDMI , HANDLER | GPIB, USB HOST, USB DEVICE, LAN, GPIB, VGA, HANDLER |
| Display | 10.1-inch color capacitive touch screen | 10.4-inch color LCD screen |
