Tektronix TLS 216 Appendix C: Internal Specifications

TLS 216 Programmer Manual C–1

Appendix C: Internal Specifications

This appendix describes details of the GPIB remote interface of the logic scope.

Normally, you will not need this information to use the logic scope, but the

information is useful when connecting to controllers of unusual configuration.

The logic scope supports many GPIB function subsets, as listed below. Some of

the listings describe subsets that the logic scope does not support.

HSH1 (Source Handshake). The logic scope can transmit multiline messages

across the GPIB.

HAH1 (Acceptor Handshake). The logic scope can receive multiline messages

across the GPIB.

HT5 (Talker). The logic scope 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 another device’s talk address is sent with ATN asserted. The logic

scope has talk-only capability for hardcopy operation.

HL4 (Listener). The logic scope becomes a listener when its listen address is

sent with the ATN (Attention) line asserted. The logic scope does not have

listen-only capability.

HSR1 (Service Request). The logic scope asserts an SRQ (Service Request)

line to notify the controller when it requires service.

HRL1 (Remote/Local). The logic scope responds to both the GTL (Go To

Local) and LLO (Local Lock Out) interface messages.

HPP0 (Parallel Poll). The logic scope has no parallel poll capability. It does

not respond to the following interface messages: PPC, PPD, PPE, and PPU.

The logic scope does not send out a status message when the ATN (Atten-

tion) and EOI (End or Identify) lines are asserted simultaneously.

HDC1 (Device Clear). The logic scope responds to the DCL (Device Clear)

and, when made a listener, the SDC (Selected Device Clear) interface

messages.

HDT1 (Device Trigger). When acting as a listener, the logic scope responds to

the GET (Group Execute Trigger) interface message.

HC0 (Controller). The logic scope cannot control other devices.