Measurement-computing WBK17 Manuel d'utilisateur télécharger pdf (Page 18)

WBK17, pg. 18

987996

WBK17, Counter/Encoder Module

PULSEWIDTH: OPT6: This allows the mapped channel’s pulsewidth to be measured instead of the

input channel. The mapped channel can be any other input channel (post debounce) or one of the detection

signals (on any channel). This option allows the counter to be used with any other input channel (post-

debounce), or with one of the detection signals. If the channel’s input is used elsewhere, for example,

gating another counter, the counter for this channel does not need to go unused.

Pulsewidth and Timing mode Accuracy

The WBK17 has the ability to measure the pulsewidth of an input and the time between any two edges on

any two inputs. The time ranges are similar to those shown for period mode except that averaging is not

available. The ranges given below reflect this.

Upper 16-bits of the 32-bit Counter Lower 16-bits of the 32-bit Counter

Range (S) Ticksize (nS) Averaging

Option

Range (S) Ticksize (nS) Averaging

Option

800 – 80000 20000 1 10m – 1 20000 1

80 – 8000 2000 1 1m – 100m 2000 1

8 – 800 200 1 100u – 10m 200 1

800m – 80 20 1 10u – 1m 20 1

Pulsewidth and Time Ranges for a 16-bit Value

Sampling error is less than 0.2%

Full 32-bit Counter

Range (S) Ticksize (nS) Averaging

Option

10m – 80000 20000 1

1m – 8000 2000 1

100u – 800 200 1

10u - 80 20 1

Pulsewidth and Time Ranges for a 32-bit Value

Sampling error is less than 0.2%

Full 32-bit Counter <10 ppm Full 32-bit Counter <1 ppm

Range (S) Ticksize (nS) Averaging

Option

Range (S) Ticksize (nS) Averaging

Option

2 – 80000 20000 1 20 – 80000 20000 1

200m – 8000 2000 1 2 – 8000 2000 1

20m – 800 200 1 200m – 800 200 1

2m – 80 20 1 20m – 80 20 1

High Accuracy Pulsewidth and Time Ranges for a 32-bit Value

that has little sampling error (<10ppm, <1ppm)

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 37 38

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Measurement-computing WBK17 Manuel d'utilisateur Page 18

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