Tektronix 067-0599-00 Manual de usuario

Serial Number

067-0599-00 CALIBRATION FIXTURE

576 Calibration Unit

The 067-0599-00 Calibration Fixture was designed specifically for

calibrating and testing the performance of the 576 Curve Tracer.

Installed in place of the Standard Test Fixture plug-in, the

067-0599-00 provides accurate calibration voltages and currents for

the horizontal and vertical deflection circuits and accurate loads

for the collector supply and step generator circuits through the

external input and output lines at the test fixture interface.

External monitoring of the step generator output is available

through and EXTERNALMONITORBNCjack providing a

V/STEP (into

10,000 Mn) output).

The Vertical, Display Offset, Horizontal and Step Generator

switches of the 576 have matching switches on the 067-0599-00 for

easy, direct-reading, comparison-style adjusting and checking,

using the 576's own display.

The 067-0599-00 is totally dependent on the 576 for regulated

low voltage power supplies and AC line voltage.

062-1101-01

-------

471

Section 1

Section 2

Section 3

Section 4

Section 5

Section 6

Section 7

CONTENTS

Characteristics

Electrical

Environmental

Physical

Mechanical

Controls and Connectors

Operating Instructions

Circuit Description

Maintenance

General Information

. ..

Calibration

Schematic Diagrams

Electrical Parts List

Mechanical Parts List

Mechanical Parts List Illustrations

SECTION1

CHARACTERISTICS

ELECTRICAL

Type 067-0599-00

Characteristics Performance Limits

Voltage Accuracies

CALIBRATORRANGEs 25 mV, 50 mV, 100 mV, 125 mV, 200 mV:

all within 0.04%

50 mVVARIABLE

Range At least -4% to at least +4%

HORIZONTALVOLTS

COLLECTOR Within 0.5%

BASE Within 0.5%

STEP GENERATOR Within 0.5%

Current Accuracies

VERTICAL

COLLECTOR Within 0.5%

EMITTER Within 0.5%

STEP GENERATOR Within 0.5%

Resistance Ratios

DISPLAYOFFSETMULTIPLIER Within 0.04%

COLLVOLTAGE

7 10 INTO 10 MD Within 0.8%

Resistive Loads

lK COLLECTORSHORT 1 kO within 0..5%

lK + 18 K 19 kO, within 5%

1-1

Characteristics--Type 067-0599-00

1-2

ELECTRICAL(cont)

Characteristics

Resistance Loads (cont)

.1 0

40 V LOAD

Camera Power

EXTERNALMONITOROutput

(With STEP GENERATORLOADS

Switch in EXT ONLYor STEP

GEN)

Performance Limits

0.1 0, within 3%

3.6

k.O,

within 5%

within

1 V/STEP (INTO 10,000 MO),

within 0.5%

POWERREQUIREMENTS

Characteristics

Temperature

Operating Range

Storage Range

Warm-up Time

Performance Requirements

Power derived through test fixture

interface of the 576.

ENVIRONMENTAL

Performance Requirements

Performance requirements listed

apply over the range of 20°C to 30°C

-40°C to +65°C

10 minutes at 25°C

Characteristics

Construction

Chassis

Cabinet

Panel

Circuit Boards

Characteristics

Overall Dimensions

Main Unit

Height

Width

Depth

Plug-In Unit

Height

Width

Depth

Weight (Total)

Connectors

Main Unit Front

Plug-In Unit

Front Panel

Rear Panel

Panel

Characteristics--Type 067-0599-00

PHYSICAL

Information

Aluminum alloy

Aluminum alloy with blue-vinyl finish

Anodized aluminum alloy

Glass-epoxy

MECHANICAL

Information

9-1/2 inches

6-3/4 inches

10-1/2 inches

4 inches

inches

6-1/4 inches

~11 lbs ..

BNC

3-pin plug on coax

Amphenol-type

1-3

Characteristics--type 067-0599-00

1-4

FUNCTIONOF CONTROLSANDCONNECTORS

FUNCTION

Selects the function to be checked or calibrated.

HORIZAMP·CAL

Applies selected CALIBRATORRANGEvoltage to the 576 Horizontal

Amplifier External Input.

HORIZATTENCHECK

Applies output of the HORIZONTALVOLTSswitch to the Horizontal

Amplifier External Input.

VERTAMPCAL

Applies selected CALIBRATORRANGEvoltage to the 576 Vertical

.Amplifier External Input.

VERTCURRENTCHECK

Applies output of the VERTICALswitch to the Vertical .Amplifier

External Input.

VERTRISETIME CHECK

Applies a 0.5 V amplitude pulse to the 576's External Vertical

input and a 0.5 V, 200 µs sweep to the External Horizontal

input.

HORIZONTALRISETIME CHECK

Applies a 0.5 V pulse to the 576's External Horizontal input and

a 0.5 V, 200 µs sweep to the External Vertical Input.

HORIZ COMPENSATION

Applies a 25 V pulse to the Collector Sensing circuit in the 576.

STEP GE_N

Connects the STEP GENERATORswitch and STEP GENERATORLOADSswitch

to the- 576's base sensing, collector sensing and collector supply

circuits.

I I

Characteristics--Type 067-0599-00

CALIBRATORRANGE

Selects one of six voltages for Horizontal or Vertical Ampb.asic

gain calibration.

50 mVVARIABLE

Varies output of the 50 mV CALIBRATORRANGEposition only.

VERTICAL

Selects calibrated deflection factors in 20 steps from 10 A to 10 µA

Collector current or 10 µA to 10 nA Emitter current. Collector or

Emitter current output selected by setting of 576 MODEswitch.

DISPLAYOFFSETMULTIPLIER

Provides offset voltage in 20 calibrated steps to either the Hori-

zontal or Vertical Amplifier External inputs as selected by the

FUNCTIONswitch.

HORIZONTAL

BASEVOLTS

Selects six calibrated deflection factors from 20 V to 0.5 V.

COLLECTORVOLTS

Selects twelve calibrated deflection factors from two 1 k

(1000 V) positions to 0.5 V.

STEP GENERATOR

Selects six calibrated voltage deflection factors and twenty-one

calibrated current deflection factors.

STEP GENERATORLOADS

OFF

Grounds Base Sensing input to the 576 and opens the Calibration

Fixture's EXTERNALMONITORoutput circuit.

COLLECTORSHORT

Provides a

1 kO

load for the 576's Step Generator output circuit

and a ground to the Collector supply and sensing circuits.

1 K +18 K

Provides a 19

load for the 576's Step Generator output circuit

and a 1

load for the 576's base sensing circuit.

1-5

---- , __ --- ----

Characteristics--Type 067-0599-00

1-6

STEP GENERATORLOADS(cont)

EXT ONLY

Routes the 576 1s Step Generator output to the Calibration Fix-

ture Is EXTERNALMONITOR_ou·tput via its STEP GENERATORswitch.

The 576's base sensing circuit is grounded. The 067-0599-00

sees only external loads in this position.

STEP GEN

. 1 0

Routes the 576's Step Generator output to the Calibration Fix-

ture's EXTERNALMONITORoutput via its STEP GENERATORswitch,

loading the 576's base sensing circuit .

Provides a 0.1 0 load for the 576's Step Generator output for

checking short circuit current limiting.

40 V LOAD

Provides a 3.6 kO load for the 576's Step Generator output to

test maximum voltage output in the voltage mode.

COLLVOLTAGE+10 INTO 1 ill

Provides a 10 to 1 divider load for the 576's·Collector Supply

and grounds the base sensing circuit.

EXTERNALMONITOR,1 V/STEP (INTO 10,000 ill)

P819

BNCconnector providing output of the STEP GENERATORLOADSswitch for

external monitoring.

3-pin plug connected to 75 0 load for the 576's CAMERAPOWERoutput.

OPERATINGCONDITIONS

There are certain conditions that must be met before the performance limits

specified are valid.

The instrument must be calibrated at an ambient temperature between +20°C

and +30°C.

Unless otherwise noted, the instrument must be operating for at least 10

minutes within its environmental limits.

! I

Type 067-0599-00

General

SECTION2

OPERATINGINSTRUCTIONS

The 067-0599-00 Calibration Fixture was designed specifically for checking

or re-calibrating the performance of the Type 576 Curve Tracer. It pro-

vides accurate calibration voltages and currents for the Horizontal and

Vertical deflection circuits and accurate loads for the Collector Supply

and Step Generator circuits. The 067-0599-00 does this through the exter-

nal input and output lines at the 576 Test Fixture interface.

The VERTICAL, DISPLAYOFFSETMULTIPLIER, HORIZONTALand STEP GENERATOR

switches on the 067-0599-00 match the 576's switches with like names for

easy, direct-reading, comparison-style adjusting and checking, using the

576's own display for measurement. External monitoring of the 576's Step

Generator output is available through the 1 V/STEP (into 10,000 m) EXTER-

NALMONITORoutput jack.

Remove the Standard Test Fixture from the Type 576 and install the 067-0599-00

Calibration Fixture plug-in module. The 067-0599-00 is totally dependent

on the Type 576 for AC line voltage and regulated low voltage power supplies.

Turn the Type 576 on and allow at least 10 minutes warm-up before making

any checks or adjustments.

Because of the multiplicity and complexity of controls on the 576 and

067-0599-00 Calibration Fixture, checking apd/or adjusting the 576 should

be done sequentially according to the Performance Check/Calibration Pro-

cedure beginning on page 5-2 of the Type 576 Instruction Manual (Tektronix

Part Number 070-0905-00).

Performance Check Only

Beginning on page 5-4 of the 576 Manual, set all instrument controls accord-

ing to the listing. Plug the 3-pin connector from the 067-0599-00 into the

CAMERAPOWERjack of the 576 to provide a 75 0 load for the 576's +15 V

power supply. Begin performance checks with Step 5, page 5-8, doing only

those parts of each step labeled CHECKFOR - .

2-1

Operating Instructions--Type 067-0599-00

2-2

Adjustment Only

For a complete or partial adjustment of the 576's internal controls with-

out a complete performance check, start with Step 4 of the adjustment and

calibration procedure on page 5-6 of the 576 Manual. Connect the CAMERA

POWERjack on the 576. Do only those parts of each step labeled ADJUST-

and printed in red.

Calibration

To do a complete calibration of the 576, using the 067-0599-00, start the

procedure with Step 3, part f., on page 5-5 of the 576 Manual. Do each

step completely, combining adjustments and performance checks. Refer to

the INITIAL CONTROLSETTINGSlist on page 5-4 to be sure the 067-0599-00

controls are properly set up to start the calibration procedure.

Using the EXTERNALMONITOROutput

When checking or adjusting the 576's Step Generator output, always monitor

with a very high input impedance. The 067-0599-00 EXTERNALMONITORSTEP

GENand EXT ONLYoutputs are 1 V/STEP into at least 10,000 ill when the

STEP GENERATORswitch on the 067-0599-00 and the STEP GENERATORAMPLITUDE

on the 576 are in matching positions. Outputs from the rest of the STEP

GENERATORLOADSswitch are the results of the indicated loads to the 576's

circuits.

I '

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