5-12 Counter Input Modes
918494
DaqBoard/3000 Series User’s Manual
PULSEWIDTH: OPT2:
Determines whether the pulsewidth is to be measured with a
16-bit
(Counter
Low), or
32-bit
(counter High) counter. Since pulsewidth measurements always have the “stop at the top”
option enabled, this option dictates whether the measurement has a range of 0 to 65535 ticks, or 0 to
4,294,967,295 ticks.
PULSEWIDTH: OPT4:
Allows the
mapped channel to gate the counter
. When the mapped channel
is
high
, the counter is enabled to count. When the mapped channel is
low
, the counter is disabled, but
holds the count value. The mapped channel can be any other input channel.
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). This option allows
the counter to be used with any other input channel (post-debounce). 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 3000 Series board 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
20833.333
1
10m – 1
20833.333
1
80 – 8000
2083.333
1
1m – 100m
2083.333
1
8 – 800
208.333
1
100u – 10m
208.333
1
800m – 80
20.833
1
10u – 1m
20.833
1
Pulsewidth and Time Ranges for a 16-bit Value
Sampling error is less than 0.21%
Full 32-bit Counter
Range (S)
Ticksize (nS)
Averaging
Option
10m – 80000
20833.333
1
1m – 8000
2083.333
1
100u – 800
208.333
1
10u - 80
20.833
1
Pulsewidth and Time Ranges for a 32-bit Value
Sampling error is less than 0.21%
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
20833.333
1
20 – 80000
20833.333
1
200m – 8000
2083.333
1
2 – 8000
2083.333
1
20m – 800
208.333
1
200m – 800
208.333
1
2m – 80
20.833
1
20m – 80
20.833
1
High Accuracy Pulsewidth and Time Ranges for a 32-bit Value
that has little sampling error (<10ppm, <1ppm)
Summary of Contents for OMB-DAQBOARD-3000 Series
Page 7: ...This product requires one of the following Operating Systems Windows 2000 Windows XP ...
Page 14: ...IG 8 DaqBoard Installation Guide 918494 1033 0940 rev 8 0 ...
Page 36: ...2 8 Connections Pinouts 918494 DaqBoard 3000 Series User s Manual ...
Page 40: ...4 2 Calibration 918494 DaqBoard 3000 Series User s Manual ...
Page 80: ...6 12 Setpoint Configuration for Output Control 908794 DaqBoard 3000 Series User s Manual ...
Page 102: ...DBK215 pg A 14 948894 Appendix A ...
Page 104: ...B 2 Hardware Analog Level Trigger 90794 Appendix B ...