Measurement Computing WBK Options - Manual (Page 186)

Counter Input Channels
The devices allow synchronous scanning of the 4 16-bit counter input channels. The four 16-bit counter channels
can also be cascaded into two 32-bit counter channels. For either cascaded or non-cascaded counter channels each
channel can be configured for:
• Clear on Read Mode – specifies that each counter should be reset to zero upon being
read and placed into the input scan.
• Continuous Totalize Mode – specifies that each counter is to free-run and not be
cleared during the input acquisition.
Reference Note
Information pertaining to Synchronization and Scanning can be found in the WaveBook User’s
Manual. A PDF version is included on the data acquisition CD and can be accessed from the CD’s
intro-screen by using the button.
Synchronous Output Operations - DBK46 Required
With the optional DBK46 Analog Output card installed, the WBK41 will allow synchronous output of D/A
channels at up to 100kHz, for each channel. The channels may have output streamed to them and be clocked-out
synchronously.
All waveform data is downloaded to a 256k sample buffer on the DBK46. The waveform can then be started and
DAC updates made synchronous to the acquisition pacer clock.
Output Channel Configuration - DBK46 Required
Analog Output Channels
Each D/A channel of a DBK46 can be configured for waveform output individually. If the D/A channel is
not configured for waveform output it then is available for asynchronous output operations.
Synchronous Output Clocking
The devices allow clocking of the synchronized output by the acquisition clock source, an internal,
programmable pacer clock or by an external clock source. When the clock source generates a new clock
signal all outputs are updated concurrently. Regardless of the clock source, the clock may not exceed the
maximum update rate of 100kHz.
Synchronous Output Data Source
Each device [that has a DBK46 installed] allows the data source for synchronized DAC output operations
to be that of a memory based buffer on the DBK46. The output data, for all the channels, is contained in
the buffer.
Thermocouple & Multifunctional Modules 926896 WBK40 & WBK41, pg. 17