Справочник Пользователя для VXi VT1529A/B

When a VT1529A/B scans through a list of channels, it stays on the last 
channel in the scan list for that VT1529A/B until the unit is scanned again. 
To minimize the “soaking” effect, have a low voltage or a short on the 
low-level inputs on this last channel.

3.  Reduce “switching crosstalk” by increasing time between channels. 
Increasing the time between channel measurements will give the 
VT1529A/B more time to settle. In the worst case, when all but one channel 
soaks the system with 80% of full-scale input voltage (0.4 V) and the system 
remains on this soaking voltage between scans, the VT1529A/B can settle 
to within about 4 µV in 40 µs. Note that this is within the offset spec of 2 µV 
within 100 µs. For best accuracy, scan at the slowest rate that is acceptable 
for that particular application.

The graph below shows the worst-case scenario for the VT1529A/B. As 
stated earlier, if only one channel is 80% of full scale, the switching 
crosstalk is barely measurable. Most system configurations do not approach 
the worst-case scenario.

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