Measurement Computing Daq PC-Card - Manual (Page 26)

2-4 10-18-00 DaqBook / DaqBoard [ISA] / Daq PC-Card User’s Manual
Using DBK Cards and Modules for Signal Conditioning
The DBK signal-conditioning units are designed for use with the Daq devices; however, the DBKs can be
used with ISA or PCI bus-based data acquisition boards from other vendors. The DBKs perform best when
used with an acquisition device that can dynamically select channel, gain, and range. Dynamic channel and
gain/range selection allow for high channel-to-channel scan rates with a variety of transducers.
DBK output signals can be bipolar, e.g., -5 to +5 V, or unipolar, e.g., 0 to 10 V. The user can select a range
of relevant values to correspond to the lowest signal (e.g., -5 or 0 V) and the highest signal (e.g., 5 or 10 V)
signal. This type of range selection guarantees the highest resolution in 12-bit or 16-bit conversion.
DBK modules share the same footprint as the DaqBook and a typical notebook PCs; allowing for
convenient stacking. The majority of these modules have their own power supply.
Several options exist for packaging and powering the DBKs and are discussed later in this chapter
The following table lists the DBKs by function. Note that the
DBK Option cards and Modules
chapter describes each DBK in detail.