Tektronix DM 5010, Инструкция по эксплуатации

Страница: 106 / 347

DM 5010 Instrument Interfacing Guide
4603-2 (2994 31)
Fig 1. The address and message terminator switches
are located on the circuit board on the left side of the
DM 5010.
WARNING
Hazardous voltages exist inside the
DM5010. The DM5010 should be
removed and disconnected from the
TM 5000 power module (after turning
power off) before opening the instrument
covers. Internal settings should only be
made by qualified personnel.
Valid primary addresses include the range of 0 to
30. (31 effectively disables the DM 5010 from commu­
nicating on the GPIB.) If your controller reserves an
address for itself, do not set the DM 5010 to that
address. This is true of Tektronix 4050-Series control­
lers, which reserve address 0 for themselves. The
Tektronix 4041 defaults to address 30 on power-on,
but may be programmed to use any primary address.
The DM 5010 ignores secondary addresses.
EOl-only is recommended as the message termina­
tor for use with Tektronix controllers. EOl-or-LF is rec­
ommended for use with Hewlett-Packard controllers.
(In the latter position, the DM 5010 still recognizes
EOI as a terminator and transmits EOI concurrently
with the LF character to terminate a message.)
Neither signature analysis nor talk-only modes are
used in normal operation with a GPIB controller, so
those switches should be set to a logic 0.
Programming The DM 5010
DM 5010 Power-On
The DM 5010 performs a self-test and goes to its
default settings on power-on.
Self-Test. During the self-test, all front-panel indi­
cators are lighted. If an internal error is detected, the
DM 5010 continuously displays a three-digit error
code and turns on the ERROR indicator. See the op­
erators manual for the meaning of any code displayed.
Power-On Settings. Following a successful self­
test, the DM 5010 goes to local state with the default
settings shown in Table 1 (and defined in Table 2).
These settings are restored any time the INIT com­
mand is executed.
Power-On SRQ. The DM 5010 asserts SRQ to re­
port power-on status after completing the self-test.
This can be handled with a serial poll, although the
DM 5010 communicates normally on the GPIB and
executes the commands it receives whether or not the
SRQ is serviced. Some controllers, such as the 4051
and 4052 when used without the 405XR14 GPIB
rompack, require that the program contain an SRQ
handler and begin by enabling the handler; otherwise
the power-on SRQ will cause the program to halt with
the error ‘ NO SRQ ON UNIT.’
Table 1
DM 5010 POWER ON SETTINGS
Header Argument
AVE 2
CALC
DBR
DCV
DIGIT
DT
LFR
LIMITS
MODE
MONITOR
NULL
OPC
OVER
RATIO
RQS
SOURCE
USER
2
Copyright 1983 by Tektronix, Inc , Beaverton. Oregon. All rights reserved.
OFF
1
-1.E + 3
4.5
OFF
OFF
0,0
RUN
OFF
0
OFF
OFF
1,0
ON
FRONT
OFF