Measurement Computing Data Acquisition Systems rev.10.4 - Manual (Page 292)

4.6-14 Daq API Command Reference
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Programmer’s Manual
Option Type and Value Definitions Continued--DaqOptionType
WBK17 Options
Option Type
(optionType)
Description Option Value
(optionValue)
Description
DcotWbk17Level
Sets the comparator
threshold level.
- 12.5 to +12.5 Volts
Threshold level.
DcovWbk17CoupleOff
Turns coupling “off.”
DcovWbk17CoupleAC
Sets coupling to AC.
DcotWbk17Coupling
Sets the input coupling.
Use AC coupling to reject
unwanted DC offsets.
Use DC coupling when
both AC and DC
components are to be
presented to the
comparator as input.
DcovWbk17CoupleDC
Sets coupling to DC.
DcovWbk17FltBypass Bypasses the analog filter.
DcovWbk17Flt100KHz
Sets cut-off frequency to
100 kHz.
DcovWbk17Flt20KHz
Sets cut-off frequency to
20 kHz.
DcotWbk17FilterType
Used to bypass the
single-pole low-pass filter
(LPF), or set it to one of
three cut-off frequencies:
100kHz, 20kHz, or
30 Hz. Used to reject
low-level noise.
DcovWbk17Flt30Hz
Sets cut-off frequency to
30 Hz.
DcovWbk17Debounce500ns 500 ns.
DcovWbk17Debounce1500ns 1500 ns.
DcovWbk17Debounce3500ns 3500 ns.
DcovWbk17Debounce7500ns 7500 ns.
DcovWbk17Debounce15500ns 15500 ns.
DcovWbk17Debounce31500ns 31500 ns.
DcovWbk17Debounce63500ns 63500 ns.
DcovWbk17Debounce127500ns 127500 ns.
DcovWbk17Debounce100µs 100 µs.
DcovWbk17Debounce300µs 300 µs.
DcovWbk17Debounce700µs 700 µs.
DcovWbk17Debounce1500µs 1500 µs.
DcovWbk17Debounce3100µs 3100 µs.
DcovWbk17Debounce6300µs 6300 µs.
DcovWbk17Debounce12700µs 12700 µs.
DcovWbk17Debounce25500µs 25500 µs.
DcotWbk17DebounceTime
Used to bypass the
debounce mode, or to set
a channel’s comparator
output to one of 16
debounce times.
Debounce is used to
eliminate switch-induced
transients typically
associated with electro-
mechanical devices
including relays,
proximity switches, and
encoders.
Note that there are two
debounce modes, “After
Stable” and “Before
Stable.” See
DcotWbk17Debounce
Trigger.
DcovWbk17DebounceNone Selects debounce bypass.
DcovWbk17RisingEdge
Selects the “Rising Edge”
for detection.
DcotWbk17Edge
Determines whether the
rising edge or falling
edge is to be detected.
DcovWbk17FallingEdge
Selects the “Falling Edge”
for detection.
DcovWbk17Tick20ns
Sets ticksize to 20 ns.
DcovWbk17Tick200ns Sets ticksize to 200 ns.
DcovWbk17Tick2000ns Sets ticksize to 2 µs.
DcotWbk17TickSize
Determines the ticksize.
The ticksize is the
fundamental unit of time
for period, pulsewidth,
and timing
measurements.
DcovWbk17Tick20000ns Sets ticksize to 20 µs.