User Manual

Glossary
ASCII
Acronym for the A merican Standard Code for Information Interchange.
Controllers
transmit commands to the digitizing oscilloscope using ASCII
character encoding.
Address
A 7-bit code that identifies an instrument on the communication bus. The
digitizing oscilloscope must have a unique address for the controller to recognize
and transmit commands to it.
Backus-Naur Form (BNF)
A standard notation system for command syntax. The syntax in this manual use
BNF notation.
Controller
A computer or other device that sends commands to and accepts responses from
the d igitizing oscilloscope.
EOI
A mnemonic referring to the control line "End or Identify" on the GPIB interface
bus. O
ne of the two possible end-of-message terminators.
EOM
Agen
eric acronym referring to the end-of-message terminator. For GPIB, the
end-of-message terminator is either an EOI or the ASCII code for line feed (LF).
For RS-232, the end-of-message terminator is the ASCII code for line feed (LF).
For USB, the end-of-message terminator is the EOM bit in a USBTMC message.
GPIB Address
When communicating with a TDS1000B, TDS2000B or TDS2000C Series
oscilloscope using a TEK-USB-488 adapter, you can set a unique GPIB address
for the oscilloscope in the UTILITY" Options " GPIB Setup option.
IEEE
Acronym for the Institute of Electrical and Electronics Engineers.
RS-232
A serial, full-duplex, asynchronous communication port that follows
ANSI/EIA/TIA-562-1989[1], ANSI/EIA/TIA-574-1990[2], and CCITT
V.24-1989[3] standards.
Serial Poll
A device (such as an oscilloscope) o n the GPIB bus can request service from the
GPIB Controller by asserting the GPIB SRQ line (a Hardware line that is only
present on the GPIB communications bus). A device on the USB bus can request
service from the host by sending an SRQ packet on the Interrupt-IN endpoint.
When a controller or a USB host acknowledges the SRQ, it "serial p olls" each
open device on the bus to determine which device on the bus requested service.
Any device requesting service returns a status byte with bit 6 set and then
TDS200, TDS1000/2000, TDS1000B/2000B, TDS2000C, TPS2000 Programmer Glossary-1