Campbell Scientific CR800 and CR850 Measurement and Control Systems - Manual (Page 430)

Section 11. Glossary
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DHCP
Dynamic Host Configuration Protocol. A TCP/IP application protocol.
differential
A sensor or measurement terminal wherein the analog voltage signal is
carried on two leads. The phenomenon measured is proportional to the
difference in voltage between the two leads.
digital
Numerically presented data.
Dim
A CRBasic command for declaring and dimensioning variables. Variables
declared with Dim remain hidden during datalogger operations.
dimension
To code for a variable array. DIM example(3) creates the three variables
example(1), example(2), and example(3). DIM example(3,3) creates nine
variables. DIM example (3,3,3) creates 27 variables.
DNS
Domain name system. A TCP/IP application protocol.
DTE
Data terminal equipment. While the term has much wider meaning, in
the limited context of practical use with the CR800, it denotes the pin
configuration, gender, and function of an RS‐232 port. The RS‐232 port
on the CR800 and on many third‐party telecommunications devices,
such as a digital cellular modems, are DCE. Attachment of a null‐modem
cable to a DCE device effectively converts it to a DTE device.
Duplex
Can be half or full. Full‐duplex is simultaneous, bidirectional data.
Duplex
The percentage of available time a feature is in an active state. For
example, if the CR800 is programmed with 1 second scan interval, but
the program completes after only 100 millisecond, the program can be
said to have a 10% duty cycle.