Tektronix Appendix C: Interface Specifications

TDS Family Oscilloscope Programmer Manual C–1
Appendix C: Interface Specifications
This appendix describes details of the GPIB remote interface of the digitizing
oscilloscope. Normally, you will not need this information to use the digitizing
oscilloscope, but the information is useful when connecting to controllers of
unusual configuration.
GPIB Function Subsets
The digitizing oscilloscope supports many GPIB function subsets, as listed
below. Some of the listings describe subsets that the digitizing oscilloscope does
not support.
HSH1 (Source Handshake). The digitizing oscilloscope can transmit multiline
messages across the GPIB.
HAH1 (Acceptor Handshake). The digitizing oscilloscope can receive
multiline messages across the GPIB.
HT5 (Talker). The digitizing oscilloscope becomes a talker when its talk
address is sent with the ATN (Attention) line asserted. It can send both
response data and status information when responding to a serial poll. It
ceases to be a talker when the talk address if another device is sent with ATN
asserted. The digitizing oscilloscope has talk-only capability for hardcopy
operation.
HL4 (Listener). The digitizing oscilloscope becomes a listener when its listen
address is sent with the ATN (Attention) line asserted. The digitizing
oscilloscope does not have listen-only capability.
HSR1 (Service Request). The digitizing oscilloscope asserts an SRQ (Service
Request) line to notify the controller when it requires service.
HRL1 (Remote/Local). The digitizing oscilloscope responds to both the GTL
(Go To Local) and LLO (Local Lock Out) interface messages.
HPP0 (Parallel Poll). The digitizing oscilloscope has no parallel poll capabili-
ty. It does not respond to the following interface messages: PPC, PPD, PPE,
and PPU. The digitizing oscilloscope does not send out a status message
when the ATN (Attention) and EOI (End or Identify) lines are asserted
simultaneously.
HDC1 (Device Clear). The digitizing oscilloscope responds to the DCL
(Device Clear) and, when made a listener, the SDC (Selected Device Clear)
interface messages.