Measurement Computing WaveBook rev.4.0 - Manual (Page 62)

4-16 WaveBook Operation Reference 06-08-01 WaveBook User’s Manual
Note: The Clock Divider can be set to a
value from 1 to 255
Acquisition Configuration Dialog Box with External Clock Enabled
The WaveBook/516 has a 32-bit internal counter that calculates and reports the external clock’s period.
The counter can be read with each scan of the analog data. This is often beneficial in later analysis, when
there is a need to correlate physical phenomena with speed.
The counter channel actually consists of two independent channels (CtrLo and CtrHi). These can be turned
“On” in the Channel Configuration Spreadsheet. When enabled, the low (CtrLo), then high (CtrHi) words
of the counter will be configured in each scan. Note that the spreadsheet’s Units column can be used to
view a predefined period in units of seconds, ms, or µsec.
WaveView can be configured to read only the low word of the counter data (CtrLo:“On,” CtrHi: “Off”).
This decreases the minimum scan period by 1 usec. This LoCtr only option can be used only when the
external clock frequency is greater than 305 Hz (20,000,000 MHz / 65536]. Note that WaveView does not
enforce this.
Programmable Features
Channels can be configured through your own custom programs or through the included out-of-the-box
WaveView software. WaveView includes a Channel Configuration screen (following figure) that allows
you to turn channels ON or OFF, select channel ranges, change channel labels, and select engineering units.
Reference Note:
The WaveView chapter contains more detailed information. Individuals who write their own
programs should refer to the readme.txt file on the install CD-ROM regarding the location of
API reference material, including program examples.
Configuring Channels from WaveView’s Main Window