UM-0085-B09
DT80 Range User Manual
Page 407
RG
DTE
Data Terminal Equipment. The information source and/or destination in an RS 232 communications link. The DT80’s
Host RS 232 port and Serial Channel are DTE devices, as is a PC’s RS 232 port (serial port).
The RS232 standard was originally designed for connecting a DTE to a DCE (e.g. a modem). However, a DTE can
also be directly connected to another DTE by means of a null-modem cable
DTUsb
Windows-based driver that provides a TCP/IP connection to the logger over USB.
echo
A communications option for commands you send to the DT80. When echo is turned on see
, commands you send to the DT80 are automatically returned to the host computer screen.
Echo is useful for troubleshooting: when the echo is on, you can see by the returned commands that the DT80 is
actually receiving them. (Once you’re confident that it is receiving, you can turn the echo off.) Also, any error
message appears right under the echo of the erroneous command, making the error obvious.
EEPROM
Electrically-Erasable Programmable Read-Only Memory. A special type of PROM that can be erased by exposing it
to an electrical charge. Requires data to be written or erased one byte at a time (compare with
below).
Retains its contents even when power is unavailable.
enable
Turn on or activate
Ethernet
A standard method for connecting a network of computers so that they can share information. The DT80 supports
"10 Base-T" Ethernet that is it operates at a data rate of 10Mbps and uses Twisted-pair cable.
Firmware
The "operating system" software stored inside the DT80. The DT80’s firmware is user-upgradeable.
Flash
A special type of EEPROM that can be erased and reprogrammed in blocks (instead of one byte at a time —
compare with
above). Flash memory is therefore much faster to erase and re-write. Retains its
contents even when power is unavailable. The DT80’s firmware is stored in Flash memory. See also
.
flow control
The process of controlling the flow of information between communications devices. For example, if data is being
sent too quickly from a DT80 to its host computer, the computer tells the DT80 to temporarily stop sending data;
then when the computer has caught up, it tells the DT80 to resume sending data. Hardware handshaking (hardware
flow control; RTS/CTS) and software handshaking (software flow control; XON/XOFF) are alternative mechanisms of
flow control.
folder
Another name for directory
format
A specific way of organising related information. For example, the DT80's internal data memory is formatted as a
DOS/Windows compatible file system.
FTP
File Transfer Protocol. A TCP/IP protocol for copying files from one computer to another.
gray code
A binary numbering system where two successive values differ by only one bit. Rotary or linear position encoders
frequently provide Gray-coded outputs to avoid the possibility of erroneous readings due to multiple bits changing
not quite simultaneously.
For example, a 3-bit Gray code sequence is 000, 001, 011, 010, 110, 111, 101, 100.
ground
A common return path that is the zero voltage reference level for the equipment or system. It may not necessarily be
connected to earth.
