Tektronix 213 Reference manual

Model 213 Quad Voltage Source

Quick Reference Guide

A GREATER MEASURE OF CONFIDENCE

INTRODUCTION

This quick reference guide contains descriptions of the features and operation of the Model 213. Also included is a programming example using a PC controller.

Olggo. Keithley Instruments, Inc.

Cleveland, Ohio, U. S. A.

Document Number: 213-903-01 Rev. A

SAFETY WARNINGS ....................... 5

FRONT PANEL FAMlLtARtZATlON ........... 7

REAR PANEL FAMlLlARlZATtON ............. 9

DIP SWtTCH ......................... 9

ANALOG OUTPUT PORTS .............. 9

DlGtTAL INPUT/OUTPUT PORTS ........ 10

BASIC OPERATION ....................... 13

DAC PORTTRIGGERING ............... 13

INTERNAL SUFFER ................... 14

CONTROL MODES .................... 16

IEEE-488 PROGRAMMING .................. 19

DEVICE-DEPENDENTCOMMANDS ...... 19

SRQ MASK AND SERIAL POLL BYTE ..... 31

STATUS WORDS ..................... 32

KEYBOARD CONTROLLER PROGRAM ....... 38

SAFETY WARNINGS

The following safety warnings should be obsewed before using Model 213 Quad Voltage Source. Refer to main manual for detailed safety information and complete operation instructions.

The Model 213 Quad Voltage Source is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read over the manual carefully before using the instrument.

Before operating the instrument, make sure the line cord is connected to a properly grounded power receptacle.

Exercise extreme caution when a shock hazard is present. Lethal voltages may be present on connsctorjacks. The American National Standards fnstitute (ANSI) states that a shock hazard exists when voltage levels greater than 30V FtMSor42.4Vpeakare present. Agoodsafety practice Is to expect that hazardous v&age Is present In any unknown clrcuii before measuring.

Inspect the connecting cables, test leads, and jumpers

for possible wear, cracks, or breaks before each use. For maximum safety, do not touch the Quad Voltage

Source connections, test cables or connections to any other instruments white power is applied to the circuit under test. Turn off att power and discharge any capacitors before connecting or disconnecting cables or jumpers.

Do not touch any object which could provide a current path to the commonside ofthecircuit undertestorpower line (earth) ground.

Do not exceed the maximum signal levels of the instrument, as shown on the rear panel and as defined in the

specifications and operation section of the instruction

manual.

tnstrumentation and accessories should not be con-

nected to humans.

Maintenance should only be performed by qualified SBW ice personnel. Before performing any maintenance, dis-

connect the line cord and all test cables from the instru-

ment.

FRONT PANEL FAMILIARIZATION

Six LEDs on the front panel of the Model 213 Quad Voltage Source disolav the status of the interface fsee Figure 1).

Ffgure 1.

TALK-On when the unit is in the talker state, off whsn the unit is in the idle or listener state.

LfSTEN - On when the unit is in the listener state, off

when the unit is in the idle or talker State. SRQ - On when the unit has generated a service Is-

quest. oft when no SW is pending. (See Service Re-

quest Mask command for more information.) ERROR-On when an error has occurred, off when no

error condition exists. (See Error Query command for more information.)

Front Panel Indicators

TEST - Used in conjunction with the Test command to verify that communication. ..__ ___, unit. The TEST light will flash wher in the auto-calibration mode. It will then remain tit when finished.

POWER-On when power is applied to the unit and the power switch on the back panel is in the on position (depressed). Off if power is not present.

n haa haen established with the

I the unit is calibrating

REAR PANEL FAMILIARIZATION

DIP SWITCH

The Model 213 hasone S-position switch @WI) accessible from the rear panel. This switch determines the unit’s IEEE address and its operating mode (normal or autocalibration). The switch is read only when the unit is powered on and should be set prior to applying power. Figure 2 illustrates the factory default setting for SWI,

Figure 2.

SW1 Factory Default Setttngs

ANALOG OUTPUT PORTS

The Model 213 can be thought of as four isolated digital to analog converters occupying one IEEE-488 bus address. Each port has a low (L), high (H), and ground

(chassis ground) line. Cha*sis ground may be connected lo the shield of shielded cable if this type of cable is used lo carry the analog signals.

The maximum common-mode input

CAUTION

voltage (the voltage between output LO and chassis ground) Is 500V peak. Exceeding this value may damage the Interface.

The pinouts for all four analog ports are labeled on the real panel of the unit and are shown in Figure 3. Each analog output is capable of sourcing and sinking a maximum current 0, ,OrnA.

PORT 1 PORT? PORT 3 PORT4 HLG HLG HLG HLG

. . . . . . . . . . . .

Figure 3. Analog Output Connector Pinout

DIGITAL INPUT/OUTPUT PORTS

The Model 213 has eight digital input lines and eight digital output lines.

Figure 4 illustrates the digital I/O edge connector as viewed from the rear of the instrument.

The digital output lines will drive two TTL loads. All digital input lines are less than 1.5 TTL loads. Normal precau-

tions should be taken to limit the input voltages to -0.3 to

+i’.O volts. All IWO lines are referenced to digital ground (pin 20).

In addition to interfacing with TTL logic Iewts, the digital

output lines can be configured es high voltage/high cur-

rent outputs. These outputs can sink up to 1 OOmA at WV DC through the use of open collector drivers with integral diodes for inductive load transient suppression. This allows for interfacing the digital outputs with relays. lamps and solenoids.

To configure the digital output lines for this purpose, it is necessary to open the enclosure and reposition the configuration jumper according to the procedure in Section 6 of the Model 213 Instruction Manual.

BASIC OPERATION

DAC PORT TRIGGERING

Triggering is the process of changing a DAC output at the ccwrrence of a trigger event. The three trigger events which can trigger a DAC port are: a Command Trigger (@), an IEEE Group Execute Trigger (GET), or an external trigger pulse applied tc the external trigger/SK2 input. Any DAC port may be configured to trigger on one or

more of these trigger sources. These trigger sources and

their relationship to a DAC port are shown in Figure 5.

As shown in the diagram, the trigger sources are routed to the ports using the trigger mask commands. The trigger mask commands are illustrated as switches. They are used to enable a trigger source to trigger the selected

DAC port. All trigger signals are then combined to allow a port tc be triggered upon the occurrencs of any of the

three trigger events.

Operation of the Model 213 is controlled by an internal

lmssc timer. Each DAC port is updated at a maximum rate of cnce every millisecond. When a trigger event cccurs, the DAC will output the programmed voltage within

1 msec of receiving the trigger.

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