Tektronix 2213 Montageanleitung

COMMITTED TO EXCELLENCE

PLEASE CHECK FOR CHANGE INFORMATION

AT THE REAR OF THIS MANUAL.

2213

OSCILLOSCOPE

OPERATORS

INSTRUCTION MANUAL

Tektronix, Inc.

P.O. Box

500

Beaverton, Oregon

97077

070-3397-00

Product Group 46

Serial Number __________

First Printing JUN 1981

Revised AUG 1982

2213 Operators

CONTROLS, CONNECTORS, AND INDICATORS

The following descriptions are intended to familiarize

the operator with the location, operation, and function of

the instrument’s controls, connectors, and indicators.

POWER, DISPLAY, AND

PROBE ADJUST

Refer to Figure 3 for location of items 1 through 7.

Internal Graticule-Eliminates parallax viewing error

between the trace and graticule lines. Rise-time

amplitude and measurement points are indicated at

the left edge of the graticule.

POWER Switch-Turns instrument power on and off.

Press in for ON; press again for OFF.

AUTO FOCUS Control-Adjusts display for optimum

definition. Once set, the focus of the crt display will

Figure 3. Power, display, and probe adjust controls, connector, and

GND Connector-Provides direct connection to

indicator.

instrument chassis ground.

be maintained as changes occur in the intensitylevel

of the trace.

PROBE ADJ

Connector-Provides an approximately

0.5

negative going, square-wave voltage (at ap-

proximately 1

kHz)

that permits the operator to com-

pensate voltage probes and to check operation of the

oscilloscope vertical system. It is not intended to ver-

ify the accuracy of the vertical gain or time-base

calibration.

BEAM FIND Switch-When held in, compresses the

display to within the graticule area and provides a

visible viewing intensity to aid in locating off-screen

displays.

TRACE ROTATION Control-Screwdriver control

used to align the crt trace with the horizontal

graticule lines.

AUTO INTENSITY Control-Adjusts brightness of

the crt display. This control has no effect when the

BEAM FIND switch is pressed in. Once the control

is set, intensity is automatically maintained at

approximately the same level between SEC/DIV

switch settings from 0.5 ms per division to 0.05

pus

per division.

VERTICAL

Refer to Figure 4 for location of items8 through 16.

SERIAL and Mod Slots-The SERIAL slot is im-

printed with the instrument’s serial number. The

Mod slot contains the option number that has been

installed in the instrument.

CH 1 OR X and CH 2 OR Y Connectors-Provide

for application of external signals to the inputs of

the vertical deflection system or for an X-Y display.

In the X-Y mode, the signal connected to the CH 1

OR X connector provides horizontal deflection,

and the signal connected to the CH 2 OR Y con-

nector provides vertical deflection.

REV NOV 1981

MHz OSCILLOSCOPE

3397-05

Figure 4. Vertical controls and connectors.

Input Coupling (AC-GND-DC) Switches-Used to

select the method of coupling input signals to the

vertical deflection system.

AC-Input signal is capacitively coupled to the

vertical amplifier. The dc component of the input

signal is blocked. Low-frequency limit (-3

point) is approximately 10 Hz.

GND-The input of the vertical amplifier is

grounded to provide a zero (ground)

reference-

voltage display (does not ground the input signal).

This switch position allows

precharging

the input

coupling capacitor.

DC-All frequency components of the input

signal are coupled to the vertical deflection system.

CH 1

VOLTS/DlV

and CH 2

VOLTS/DIV

Switches-

Used to select the vertical deflection factor in a l-2-5

sequence. To obtain a calibrated deflection factor,

the

VOLTS/DIV

variable control must be in detent.

PROBE-Indicates the deflection factor

selected when using either a

probe or a coaxial

cable.

2213 Operators

10X

PROBE-Indicates the deflection factor

selected when using a 10X probe.

VOLTS/DIV

Variable Controls-When

rotated

coun-

ter clockwise out of their detent positions, these

controls provide continuously variable, uncalibrated

deflection factors between the calibrated settings of

the

VOLTS/DIV

switches.Extends maximum uncali-

brated deflection factor to 25 volts per division with IX

probe (a range of at least 2.51).

INVERT Switch-Inverts the Channel 2 display when

button is pressed in. Push button must be pressed

in a second time to release it and regain a noninverted

display.

VERTICAL MODE Switches-Two three-position

switches are used to select the

mode of operation

for

the vertical amplifier system.

CH I-Selects only the Channel 1 input signal for

display.

BOTH-Selects both Channel 1 and Channel 2

input signals

for display.

The BOTH position must

be selected for either ADD, ALT, or CHOP

operation.

2-Selects

only the Channel 2 input signal for

display.

ADD-Displays the algebraic sum of the Channel 1

and Channel 2 input signals.

ALT-Alternately displays Channel 1 and Channel

2 input signals. The alternation occurs during

retrace at the end of each sweep.

This

mode

is useful for viewing both input signals at sweep

speeds from 0.05

per division to 0.2 ms per

division.

CHOP-The display switches between the Chan-

nel 1 and Channel 2 input signals during the

sweep. The switching rate is approximately 250

kHz.

This mode is useful for viewing both Channel

1 and Channel 2 input signals at sweep speeds

from 0.5 ms per division to 0.5 s per division.

POSITION Controls-Used to vertically position the

display on the crt. When theSEC/DIV switch is set to

X-Y, the Channel 2 POSITION control moves the

display vertically (Y-axis), and the Horizontal

POSITION control moves the display horizontally

(X-axis).

REV OCT 1981

2213 Operators

HORIZONTAL

Refer to Figure 5 for location of items 17 through 22.

DELAY

TIME-Two controls are used in conjunction

with

INTENS

and DLY’D HORIZONTAL MODE to

select the amount of delay time between the start of

the sweep and the beginning of the intensified zone.

Range Selector

Switch-This three-position switch

selects 0.5

rc(s,

,us,

and 0.2 ms of delay time. To

increase the sweep delay from the calibrated

setting of the Range Selector switch, rotate the

MULTIPLIER control clockwise.

MULTIPLIER Control-Provides variable sweep

delay from less than 1 to greater than 20 times the

setting of the Range Selector switch.

SEC/DIV

Switch-Used to select the sweep speed

for the sweep generator in a l-2-5 sequence.

For

calibrated sweep speeds, the

SEC/DIV

Variable

control must

be in the calibrated detent (fully clock-

wise).

SEC/W

3397-06

Figure 5. Horizontal controls.

SEC/DIV

Variable

Control-Provides continuously

variable, uncalibrated sweep speeds to at least 2.5

times the calibrated setting. It extends the slowest

sweep speed to at least 1.25 s per division.

X10

Magnifier Switch-To

increase displayed sweep

speed by a factor of 10, pull out the

SEC/DIV

Variable knob. The fastest sweep speed can be

extended to 5 ns per division. Push in the

SEC/DIV

Variable control knob to regain the Xl sweep speed.

HORIZONTAL MODE Switch-This three-position

switch determines

the mode of operation for the

horizontal deflection system.

NO DLY-Horizontal deflection is provided by the

sweep generator,without a delayed start, at a

sweep speed determined by the

SEC/DIV

switch.

INTENS-Horizontal deflection is provided by the

sweep generator at a sweep speed determined by

the

SEC/DIV

switch. The sweep generator also

provides an intensified zone on the display. The

start of the intensified zone represents the sweep-

start point when DLY’D HORIZONTAL MODE

is selected.

DLY’D-Horizontal deflection is provided by the

sweep generator at a sweep speed determined by

the

SEC/DIV

switch setting. The start of the

sweep is delayed from the initial sweep-trigger

point by a time determined by the setting of the

DELAY TIME Range Selector switch and MULTI-

PLIER control.

POSITION Control-Positions the display hori-

zontally

in all modes.

TRIGGER

Refer to Figure 6 for locations of items 23 through 30.

EXT INPUT

Connector-Provides a means of intro-

ducing external signals into the trigger generator.

EXT COUPLING

Switch-Determines the method

used

couple external signals to the Trigger circuit.

AC-Signals above 60 Hz are capacitively coupled

to the input of the Trigger circuit.

Any dc com-

ponents are blocked, and signals below 60 Hz are

attenuated.

2213 Operators

DC-All

components of the signal are coupled to

the trigger circuitry. This position

useful

for

displaying low-frequency or low-repetition-rate

signals.

DC+lO-External

trigger signals are attenuated by

a factor of 10.

SOURCE Switch-Determines the source of the

trigger signal that is coupled to the input of the

trigger circuit.

INT-Permits triggering on signals that are applied

to the CH 1 OR X and CH 2 OR Y input con-

nectors. The source of the internal signal is

selected by the INT switch.

LINE-Provides a triggering signal from a sample

of the ac-power-source waveform. This trigger

source is useful when channel-input signals are

time related (multiple or submultiple) to the

frequency on the power-source-input voltage.

EXT-Permits triggering on signals applied to the

EXT INPUT connector.

3397-07

Figure 6. Trigger controls, connector, and indicator.

INT Switch-Selects the source of the triggering

signal when the

SOURCE switch is set to INT.

CH I-The signal applied to the CH 1 OR X input

connector is the

source of the trigger signal.

VERT MODE-The internal trigger source is

determined by the signals selected for display by

the VERTICAL MODE switches.

2-The signal applied to the CH 2 OR Y input

connector is the source of the trigger signal.

LEVEL Control-Selects the amplitude point on the

trigger signal at

which

the sweep is triggered.

TRIG’D Indicator-The light-emitting diode (LED)

illuminates to indicate that the sweep is triggered.

SLOPE Switch-Selects the slope of the signal that

triggers the sweep (also refer to TV Signal Displays at

the end of “Instrument Familiarization”).

I-Sweep is

triggered on the positive-going

portion of the trigger signal.

I-Sweep

is triggered on the negative-going

portion of the trigger signal.

MODE Switch-Determines the trigger mode for the

sweep.

AUTO-Permits triggering on waveforms having

repetition rates of at least 20 Hz. Sweep free-runs

in the absence of an adquate trigger signal or when

the repetition rate is below 20 Hz. The range of

the TRIGGER LEVEL control will compensate

for the amplitude variations of the trigger signals.

NORM-Sweep is initiated when an adequate

trigger signal is applied.

In the absence of a trigger

signal, no baseline trace will be present. Triggering

on television lines is accomplished in this mode.

TV FIELD-Permits triggering on television field-

rate signals (refer to

Signal Displays at the end

of “Instrument Familiarization”.

VAR HOLDOFF

Control-Provides continuous con-

trol of

holdoff

time between sweeps. Increases

the

holdoff

time by at least a factor of four. This

control improves the ability to trigger on aperiodic

signals (such as complex digital waveforms).

REV NOV 1981

2213 Operators

REAR PANEL

Refer to Figure 7 for location of item 32.

EXT

AXIS Connector-Provides a means of

con-

necting

external signals to the Z-axis amplifier to

intensity modulate the crt display. Applied signals

do not affect display waveshape. Signals with fast

rise times and fall times provide the most abrupt

intensity change, and a 5-V p-p signal will produce

noticeable modulation. The Z-axis signals must be

time-related to the display to obtain a stable

present-

ation

on the crt.

REPLACE ONLY WITH SPECIFIED

TYPE

AND RATED FUSE DISCONNECT

POWER INPUT BEFORE REPLACING FUSE GROUNDING CONDUCTOR

lOK0

POSITIVE GOING

3397-08

Figure 7. Rear-panel connector.

2213 Operators

OPERATING CONSIDERATIONS

This section contains basic operating information and

techniques that should be considered before attempting

any measurements.

GRATICULE

The graticule is internally marked on the faceplate of

the crt to enable accurate measurements without parallax

error (see Figure 8). It is marked with eight vertical and ten

horizontal major divisions. Each major division is divided

into five subdivisions. The vertical deflection factors and

horizontal timing are calibrated to the graticule so that

accurate measurements can be made directly from the crt.

Also, percentage markers for the measurement of rise and

fall times are located on the left side of the graticule.

1ST OR LEFT CENTER

11TH

OR RIGHT

VERTICAL VERTICAL VERTICAL

GRATICULE GRATICULE GRATICULE

LINE

RISE AND CENTER

FALL TIME HORIZONTAL

MEASUREMENT GRATICULE

PERCENTAGE LINE

MARKERS

4115-16

Figure 8. Graticule measurement markings.

GROUNDING

The most reliable signal measurements are made when

the 2213 and the unit under test are connected by a com-

mon reference (ground lead), in addition to the signal lead

or probe. The probe’s ground lead provides the best

grounding method for signal interconnection and ensures

the maximum amount of signal-lead shielding in the probe

cable. A separate ground lead can also be connected from

the unit under test to the oscilloscope GND connector

located on the front panel.

SIGNAL CONNECTIONS

Generally, probes offer the most convenient means of

connecting an input signal to the instrument. They are

shielded to prevent pickup of electromagnetic interference,

and the supplied 10X probe offers a high input impedance

that minimizes circuit loading. This allows the circuit under

test to operate with a minimum of change from its normal

condition as measurements are being made.

Coaxial cables may also be used to connect signals to the

input connectors, but they may have considerable effect on

the accuracy of a displayed waveform. To maintain the

original frequency characteristics of an applied signal,

only high-quality, low-loss coaxial cables should be used.

Coaxial cables should be terminated at both ends in their

characteristic impedance. If this is not possible, use suitable

impedance-matching devices.

INPUT COUPLING CAPACITOR

PRECHARGING

When the input coupling switch is set to GND, the input

signal is connected to ground through the input coupling

capacitor in series with a

l-MS2

resistor to form a

pre-

charging network. This network allows the input coupling

capacitor to charge to the average dc-voltage level of the

signal applied to the probe. Thus, any large voltage

transients that may accidentally be generated will not be

applied to the amplifier input when the input coupling

switch is moved from GND to AC. The

precharging

net-

work also provides a measure of protection to the external

circuitry by reducing the current levels that can be drawn

from the external circuitry during capacitor charging.

The following procedure should be used whenever the

probe tip is connected to a signal source having a different

dc level than that previously applied, especially if the

dc-

level difference is more than 10 times the

VOLTS/DIV

switch setting:

1. Set the AC-GND-DC switch to GND before con-

necting the probe tip to a signal source.

2. Insert the probe tip into the oscilloscope GND

connector.

2213 Operators

3. Wait several seconds for the input coupling capacitor

to discharge. 6. Set the AC-GND-DC switch to AC. The display will

remain on the screen, and the ac component of the signal

can be measured in the normal manner.

4. Connect the probe tip to the signal source.

INSTRUMENT COOLING

5. Wait several seconds for the input coupling capacitor

to charge.

To maintain adequate instrument cooling, the ventila-

tion holes on both sides and rear panel of the equipment

cabinet must remain free of obstructions.

INSTRUMENT FAMILIARIZATION

INTRODUCTION

The procedures in this section are designed to assist you

in quickly becoming familiar with the 2213. They provide

information which demonstrates the use of all the controls,

connectors, and indicators and will enable you to effi-

ciently operate the instrument.

Before proceeding with these instructions, verify that

the POWER switch is OFF (push button out), then plug

the power cord into the ac-power-input-source outlet.

If during the performance of these procedures an im-

proper indication or instrument malfunction is noted, first

verify correct operation of associated equipment. Should

the malfunction persist, refer the instrument to qualified

service personnel for repair or adjustment.

The equipment listed in Table 1, or equivalent equip-

ment,

required to complete these familiarization

procedures.

Table 1

Equipment Required for Instrument

Familiarization Procedure

Description Minimum Specification

Calibration

Generator

Standard-ampl

itude accuracy:

50.25%.

Signal amplitude: 2

to 50 V.

Output signal: 1 -kHz square wave.

Fast-rise repetition rate: 1 to

100

kHz.

Rise time: 1 ns or less.

Signal amplitude: 100

to 1 V.

Aberrations:

+2%.

Dual-Input

Coupler Connectors: bnc-female-to-dual-bnc-male.

Cable

(2 required) Impedance: 50

s2.

Length: 42 in.

Connectors: bnc.

Adapter Connectors: bnc-female-to-bnc female.

Termination Impedance: 50

Connectors: bnc.

BASELINE TRACE

NOTE

First obtain a baseline trace, using the following

procedure.

1. Preset the instrument front-panel controls as follows:

Display

AUTO INTENSITY

AUTO FOCUS

Vertical (Both Channels)

AC-GND-DC

VOLTS/DlV

VOLTS/D IV Variable

VERTICAL MODE

INVERT

POSITION

Horizontal

SEC/DIV

SEC/DlV

Variable

HORIZONTAL MODE

X 10 Magnifier

POSITION

DELAY TIME

Range Selector

MULTIPLIER

Trigger

SLOPE

LEVEL

MODE

EXT COUPLING

SOURCE

VAR

HOLDOFF

INT

Fully counterclockwise

(minimum)

Midrange

50m (IX)

Calibrated detent

(fully clockwise)

CH 1

Off (button out)

Midrange

0.5

Calibrated detent

(fully clockwise)

NO DLY

Off (variable knob in)

Midrange

0.2 ms

Fully counterclockwise

J(lever

up)

Midrange

AUTO

INT

Fully counterclockwise

VERT MODE

2. Press in the POWER switch button (ON) and allow

the instrument to warm up for 20 minutes.

3. Adjust the AUTO INTENSITY control for desired

display brightness.

4. Adjust the Vertical and Horizontal POSITION

controls to center the trace on the screen.

2213 Operators

Normally, the resulting trace will be parallel with

the center horizontal graticule line and should not

require adjustment. If trace alignment is required,

see the “Trace Rotation

”

adjustment procedure

under “Opera tor’s Adjustments.

”

Afterobtaining a baseli

trace,you are now ready to

connectan input signal anddisplay iton the crt screen.

DISPLAYING A SIGNAL

1. Connect the calibration generator standard-amplitude

output to both the CH 1 and CH 2 inputs as shown in

Figure 9.

Set the calibration generator for a standard-amplitude

1-kHz

square-wave signal and adjust its output to obtain

a vertical display of 4 divisions.

3. Adjust the Channel 1 POSITION control to center

the display vertically on the screen.

4. Adjust the TRIGGER LEVEL control, if necessary,

to obtain a stable triggered display.

NOTE

The

TRIG’D

indicator should illuminate to indicate

that the sweep is triggered.

5. Rotate the AUTO FOCUS control between its

maximumclockwise and counterclockwise positions.

The display should become blurred on either side of the

optimum control setting.

6. Set the AUTO FOCUS control for a sharp,

well-

defined display over the entire trace length.

7. Move the display off the screen using the Channel 1

POSITION control.

8. Press in and hold the BEAM FIND push button;

the display should reappear on the screen. Adjust the

Channel 1 and Horizontal POSITION controls to center

the trace both vertically and horizontally. Release the

2213 Operators

BEAM FIND

button; the display should remain within

the viewing area.

Set the Channel 1 AC-GND-DC switch to AC.

6. Observe that the display is centered approximately

at the center horizontal line.9. Adjust the AUTO INTENSITY control counterclock-

wise until the display disappears.

Set the CH 1

VOLTS/DlV

switch to 0.1 (IX) and

observe that a 2-division vertical display appears.10. Press in and hold the BEAM FIND push button;

the display should reappear. Release the BEAM FIND

button and adjust the AUTO INTENSITY control to

desired display brightness. 8. Rotate the CH

VOLTS/DIV

Variable control

fully counterclockwise.

Using the Vertical Section

Set the Channel

AC-GND-DC switch to GND. 9. Observe that minimum vertical deflection occurs

when the

VOLTS/DlV

Variable contol is fully counter-

clockwise.

2. Adjust the trace to the center horizontal graticule

line.

IO. Rotate the CH

VOLTS/DIV

Variable control

fully

clockwise

to the CAL detent.

3. Set the Channel 1 AC-GND-DC switch to DC.

4. Observe that the bottom of the display remains at

the center horizontal graticule line (ground reference).

11.

Select

CH 2 VERTICAL MODE and again perform

preceding steps 1 through 10 using Channel

controls.

Performance should be similar to Channel 1.

CALIBRATION

GENERATOR

DUAL-INP

COUPLE AMPL

OUTPUT

CABLE

3397-10

Figure 9. Initial setup for instrument familiarization procedure.

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