Spider-80Hi (v8.9) Compared with Spider-80Xi
The Spider-80Hi has undergone significant hardware upgrades, delivering substantial improvements in performance. Most notably, the sampling rate has increased from 102.4 kHz to 512 kHz for both the input and output channels. Moreover, compared to the Spider-80Xi V7, the noise floor has been reduced by 15 dB, while the input THD has decreased by 11 dB and the output THD has decreased by 6 dB. Additionally, crosstalk has been lowered by 20 dB, and the CMRR has seen a major improvement, increasing from -70 dB to -120 dB. Finally, amplitude linearity has been refined to 0.05 dB across the entire range.
The isolation of digital and analog circuitry in addition to the enhancements on the input channel front-end have minimized ground loops resulting in higher signal integrity. Upgrades to the output DAC allow for higher sample rates and provide a greater dynamic range. Lastly, refinements in the IEPE constant current power supply have significantly reduced noise at low frequencies. Together, these enhancements improve the system’s precision and overall performance, making it well-suited for even the most demanding measurement applications.
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Specification |
Spider-80Xi Version 7.7 |
Spider-80Hi Version 8.9 |
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|
Maximum Sampling Rate |
102.4 kHz |
512 kHz |
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Noise (at 1 kHz) |
80 nV/√Hz |
23.9 nV/√Hz |
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Dynamic Range |
160 dBFs |
175 dBFs |
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Harmonic Distortion (2 V Input Signal) |
Frequency |
THD |
Frequency |
THD |
|
1 kHz |
-94 dB |
1 kHz |
-105 dB |
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|
8 kHz |
-83 dB |
8 kHz |
-97 dB |
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Crosstalk |
-100 dB |
-120 dB |
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Common Mode Rejection Ratio |
-70 dB |
-120 dB |
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Amplitude Linearity |
Amplitude Range (dBFS) |
Amplitude Error |
0.05 dB for entire amplitude range |
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|
0 to -80 |
0.1 dB |
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-20 to -100 |
0.25 dB |
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-120 to -120 |
0.5 dB |
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-120 to -140 |
1 dB |
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Table 1. Input Channel Specifications
|
Specification |
Spider-80Xi Version 7.7 |
Spider-80Hi Version 8.9 |
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|
Maximum Sampling Rate |
102.4 kHz |
512 kHz |
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|
Dynamic Range |
120 dB |
127 dB |
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|
Harmonic Distortion (1 V output) |
Frequency |
THD |
Frequency |
THD |
|
1 kHz |
-91 dB |
1 kHz |
-97 dB |
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|
8 kHz |
-78 dB |
8 kHz |
-94 dB |
|
|
Crosstalk |
120 dB |
132 dB |
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Table 2. Output Channel Specifications
Spectrum plots regarding the improvements to noise floor and THD can be found below. Full details regarding all specifications can be available upon request.
Comparison of Noise Floor:
Figure 1. Noise floor with the Spider-80Xi V7.7 and the Spider-80Hi V8.9. The 80Xi is in purple and 80Hi is in blue. dB reference is set to 20 V (the full range of input)
Comparison of Total Harmonic Distortion:
Figure 2. THD with the Spider-80Xi V7.7 and the Spider-80Hi V8.9. The 80Xi is purple and the 80Hi is in blue.
Figure 3. CMMR at 1 kHz with the Spider-80Xi V7.7 and the Spider-80Hi V8.9. The 80Xi is purple and the 80Hi is in blue.