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| resources:eval:user-guides:high-temp:testreport [28 Feb 2018 19:53] – initial version Jeff Watson | resources:eval:user-guides:high-temp:testreport [03 Jan 2021 22:04] (current) – fix links Robin Getz |
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| ===== Crosstalk ===== | ===== Crosstalk ===== |
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| Crosstalk, in simplified terms, is a metric of how much a channel in a data acquisition system is effected by signal(s) on adjacent channel(s). For more information on crosstalk in data converters, see this[[http://www.analog.com/en/analog-dialogue/raqs/raq-issue-75.html|"Rarely Asked Questions" article.]] | Crosstalk, in simplified terms, is a metric of how much a channel in a data acquisition system is effected by signal(s) on adjacent channel(s). For more information on crosstalk in data converters, see this[[adi>en/analog-dialogue/raqs/raq-issue-75.html|"Rarely Asked Questions" article.]] |
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| For this test, a single board was used at room temperature. It was powered with +5VDC Vp/-2.5VDC Vm / +3.3VDC. A very low distortion signal generature was connected to a single channel at a time, AC coupled through a 3.3ųF capacitor. Unused channels were AC terminated to ground with a 3.3ųF capacitor. No multiplexer channels were switch during acquisition. The sample rate was set at 400ksps, and an 8192 point FFT was used for analysis, captured with the HT DAQ viewer software. The tables below show signal measurement in dBFS for 1kHz and 10kHz tone inputs. Channel to channel isolation is very good considering that signals are connected to the board with unshielded single ended wiring and pass through a Micro-D connector, which is not an connector optimized for signal integrity. | For this test, a single board was used at room temperature. It was powered with +5VDC Vp/-2.5VDC Vm / +3.3VDC. A very low distortion signal generature was connected to a single channel at a time, AC coupled through a 3.3ųF capacitor. Unused channels were AC terminated to ground with a 3.3ųF capacitor. No multiplexer channels were switch during acquisition. The sample rate was set at 400ksps, and an 8192 point FFT was used for analysis, captured with the HT DAQ viewer software. The tables below show signal measurement in dBFS for 1kHz and 10kHz tone inputs. Channel to channel isolation is very good considering that signals are connected to the board with unshielded single ended wiring and pass through a Micro-D connector, which is not an connector optimized for signal integrity. |
