Tektronix PS 5010 User Manual

INSTRUMENT RESPONSE TO IEEE-488 INTERFACE
MESSAGES
Interface messages and their effects on the instruments
interface functions are defined in IEEE Standard 488-1978.
Abbreviations from the standard are used in this discussion
which describe the effects of interface messages on instru-
ment operation.
Bus interface control messages are sent as low level
commands through the use of WBYTE controller com-
mands. For the following commands
A = 32 plus the instru-
ment address and B
= 64 plus the instrument address.
Listen
Unlisten
Talk
Untalk
Untalk-unlisten
Device clear (DCL)
Selective device clear (SDC)
Go to local (GTL)
Remote with lockout
Local lockout of all instruments
Group execute trigger (GET)
WBYTE
@ A:
WBYTE
@ 63:
WBYTE @ B:
WBYTE
@ 95:
WBYTE
@ 63, 95:
WBYTE
@ 20
WBYTE
@ A, 4:
WBYTE
@ A, 1:
WBYTE @ A, 17, 63:
WBYTE
@ 17:
WBYTE @ A, 8:
These commands are for the TEKTRONIX 4050-Series
controllers and representative for other controllers.
When the UNL command is received, the instruments lis-
tener function goes to its idle state (unaddressed). In the idle
state, the instrument will not accept instrument commands
from the GPIB.
The talker function goes to its idle state when the instru-
ment receives the UNT command.
In this state, the instru-
ment cannot output data via the GPIB.
The ADDRESSED light is off when both the talker and
listener functions are idle. If the instrument is either talk ad-
dressed or listen addressed, the light is on.
IFClnterface Clear
This uniline message has the same affect as both the
UNT and UNL messages. The front panel ADDRESSED
light is off.
DCLDevice Clear
The Device Clear message reinitializes communication
between the instrument and controller. In response to
BCb,
the instrument clears any input and output messages and
any unexecuted settings in the Pending Settings Buffer.
Also cleared are any errors or events waiting to be reported,
except the power-on event. If the SRQ line is asserted for
any reason other than power-on when DCL is received, the
SRQ is unasserted.
SDC-Selected Device Clear
This message performs the same function as DCL; how-
ever, only instruments that are listen addressed respond to
SDC.
GET-Group Execute Trigger
The instrument responds to GET only if it is listen ad-
dressed and the instruments device trigger function has
been enabled by the Device Trigger command (DT). The
GET message is ignored and an SRQ generated if the DT
function is disabled (DT
OFF), the instrument is in the local
state, or if a message is being processed when GET is
received.
SPE-Serial Poll Enable
SPD-Serial Poll Disable
The SPE message enables the instrument to output
serial poll status bytes when it is talk addressed. The SPD
message switches the instrument back to its normal oper-
ation of sending the data from the Output Buffer.
MLA-My Listen Address
MTA-My Talk Address
The primary listen and talk addresses are established by
the instruments GPIB address (internally set). The current
setting of the GPIB address is displayed on the front panel
when the ID button is pressed. When the instrument is ad-
dressed to talk or listen, the front panel ADDRESSED indi-
cator is illuminated.
LLO-Local Lockout
In response to LLO, the instrument goes to a lockout
state-from LOCS to LWLS or from
REMS to RWLS.

Tektronix PS 5010 Specifications

General

Brand	Tektronix
Model	PS 5010
Category	Power Supply
Language	English