HP 8340b Operating Instructions

REMOTE causes listening instruments to switch from local (front panel) control to remote pro¬
gram control. The HP-IB sequence:
REN ATN UNL LAG
LOCAL clears the REMOTE message and causes the listening instruments to return to local
control. The HP-IB sequence:
ATN UNL LAG REN GTL
LOCAL prevents an instrument over-ride of remote control. The front panel [LOCAL] key is
LOCKOUT inoperative, and only the controller (or a hard reset by the POWER switch) can restore
local control. The sequence:
REN ATN LLO
CLEAR causes all instruments on the bus to be removed from local lockout and to return to
LOCKOUT/ local control. The HP-IB sequence:
LOCAL
REN
REQUIRE (SRQ) can be sent by an instrument at any time to signify that attention is required from
SERVICE the controller. The HP-IB sequence:
SRQ
The SRQ is held true until the instrument no longer needs service, or until a poll is
conducted to determine the nature of the SRQ.
STATUS is an 8-bit byte of information from an addressed instrument, with each bit signifying
BYTE the status of a specific instrument. The HP-IB sequence:
ATN UNL LAD SPE ATN (data byte) OR LF ATN SPD
is a parallel poll of the bus instruments. The HP 8340B/41B does not respond to parallel
polling.
transfers active control of the bus from one controller to another. The HP-IB sequence:
ATN UNL TAD TOT
terminates all bus transactions, and causes all instruments to listen for a command
from the controller. The HP-IB sequence:
IFC REN ATN
This completes the 12 HP-IB messages.
STATUS
BIT
PASS
CONTROL
ABORT
3-88
Operating Information
HP 8340B/41B

HP 8340b Specifications

General

Brand	HP
Model	8340b
Category	Inverter
Language	English