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Tektronix 3B5, Инструкция по эксплуатации


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4

MAINTENANCE

Introduction

This

 

section

 

of

 the 

manual 

contains

 maintenance

 

informa

­

tion

 

for use in preventive maintenance, 

corrective

 mainten­

ance or

 troubleshooting 

of

 

the

 

Type 3B5.

PREVENTIVE

 MAINTENANCE

General

Preventive maintenance consists 

of

 cleaning,

 

visual

 

inspec­

tion,

 

lubrication, 

etc.

 

Preventive 

maintenance 

performed

 

on 

a

 regular

 

basis 

may

 

prevent

 

instrument

 breakdown 

and

 will 

improve

 

the

 

reliability

 

of

 

this

 instrument. The

 

severity of

 

the

 

environment 

to

 

which

 

the

 

Type 

3B5

 

is 

subjected

 

will

 

deter­

mine

 

the

 

frequency

 

of maintenance.

 A

 

convenient 

time

 

to

 

perform

 

preventive

 

maintenance

 

is

 preceding 

recalibration

 

of

 

the

 

instrument.

Cleaning

The

 

Type

 

3B5 

should

 be cleaned

 

as

 

often as 

operating 

conditions

 

require.

 

Accumulation

 

of 

dirt

 

in 

the

 

instrument

 

can

 cause

 

overheating

 and

 

component

 breakdown.

 

Dirt 

on

 

components

 

acts

 

as 

an

 

insulating 

blanket

 

and 

prevents

 

efficient

 

heat

 dissipation.

 

It 

also

 provides 

an

 

electrical

 

con

­

duction

 

path.

The

 covers

 

of

 the 

indicator

 oscilloscope

 

minimize

 the 

amount

 

of dust which

 reaches

 

the

 

interior

 

of

 

the

 

Type

 

3B5. 

Operation 

of

 

the

 

system

 

without 

covers

 

in

 

place

 

necessitates 

more

 

frequent cleaning.

 When

 

the

 

Type 

3B5 

is

 not 

in use,

 

it

 

should 

be

 

stored

 

in 

a

 

protected

 

location

 

such

 

as

 

a 

dust-

 

tight 

cabinet.

CAUTION

Avoid 

the

 use

 

of

 

chemical 

cleaning

 

agents

 

which

 

might

 damage

 the

 

plastics

 

used

 

in

 this

 

instrument.

 

Avoid 

chemicals

 

which 

contain

 

benzene,

 

toluene,

 

xylene,

 acetone

 

or 

similar solvents.

Exterior. 

Loose 

dust 

accumulated 

on

 

the

 front 

panel 

of

 

the

 

Type

 

3B5 

can

 

be

 

removed with 

a

 

soft

 cloth or

 

small 

paint

 

brush. 

The

 

paint 

brush is 

particularly

 

useful

 

for

 dis­

lodging

 dirt 

on 

and

 around

 

the

 

front-panel 

controls. 

Dirt

 

which

 

remains 

can

 

be

 

removed

 

with

 

a

 

soft 

cloth

 

dampened

 

in

 

a

 mild

 

detergent and water solution. Abrasive 

cleaners 

should 

not

 

be

 

used.

Interior.

 

Dust

 

in

 the

 

interior

 

of 

the

 unit 

should

 be removed 

occasionally

 due 

to

 

its 

electrical

 

conductivity

 under high- 

humidity 

conditions.

 

The

 

best

 way

 

to

 

clean 

the

 

interior

 

is 

to

 

blow

 

off 

the

 

accumulated 

dust

 

with

 

dry,

 

low-velocity

 air. 

Remove

 any

 

dirt

 which

 

remains

 with

 a

 soft paint

 brush

 or a

 

cloth

 

dampened

 

with 

a 

mild

 

detergent

 

and

 

water 

solution. 

A

 

cotton-tipped applicator

 

is 

useful

 

for 

cleaning

 

in

 

narrow 

spaces

 

or 

for cleaning

 ceramic terminal 

strips 

and

 circuit 

boards.

Lubrication

The

 

reliability

 of potentiometers, 

rotary

 switches

 and 

other

 

moving

 

parts

 can

 

be

 

maintained

 

if

 

they

 

are

 kept

 

prop­

erly

 

lubricated. 

Use

 a

 

cleaning-type

 

lubricant 

(e.g.,

 

Tektronix 

Part No.

 

006-0218-00) 

on

 

shaft

 

bushings 

and

 switch contacts. 

Lubricate

 

switch

 

detents

 with

 

a

 

heavier

 grease 

(e.g.,

 

Tektronix 

Part

 

No. 

006-0219-00).

 Potentiometers

 which

 

are 

not

 

perma

­

nently 

sealed

 

should

 be lubricated

 

with

 

a

 

lubricant

 which 

will

 

not

 

affect 

electrical 

characteristics 

(e.g.,

 

Tektronix

 

Part 

No. 

006-0220-00). Do

 

not over-lubricate. 

A

 

lubrication 

kit 

containing

 the

 

necessary

 

lubricants

 

and instructions 

is

 

avail­

able 

from

 

Tektronix,

 

Inc.

 Order

 

Tektronix

 

Part

 

No.

 

003-

 

0342-00.

Visual

 Inspection

The

 

Type

 

3B5

 should

 

be

 

inspected

 

occasionally 

for 

such 

defects

 

as

 broken

 

connections,

 broken

 

or

 

damaged 

ceramic 

strips,

 improperly

 

seated

 

transistors

 

or 

nuvistors, 

damaged

 

circuit 

boards

 

and

 

heat-damaged

 

parts.

The

 

corrective 

procedure

 

for most visible defects

 

is

 

obvious;

 

however,

 

particular

 care 

must

 be

 

taken

 if heat-damaged 

components

 

are

 

found. 

Overheating

 

usually indicates 

other 

trouble

 

in 

the

 

instrument;

 

therefore,

 it

 

is

 important

 

that

 

the 

cause

 

of

 

overheating 

be

 

corrected

 to prevent

 

recurrence 

of 

the 

damage.

Transistor and

 

Nuvistor

 Checks

Periodic

 checks

 

of

 

the

 

transistors

 

and

 

nuvistors in

 the 

Type

 

3B5

 

are not 

recommended.

 

The

 

best 

check

 of

 

transistor

 

or

 

nuvistor

 

performance

 

is

 

its

 

actual

 operation

 

in

 the 

instrument.

 

More

 

details 

on

 

checking 

transistor

 

and

 

nuvistor 

operation 

is

 given

 under

 Troubleshooting.

Recalibration

To 

assure accurate measurements,

 

check 

the

 calibration

 

of 

this

 

instrument

 

after

 

each 

500 

hours of operation

 

or every

 

six

 

months

 

if

 

used

 

infrequently.

 

In

 

addition,

 

replacement

 

of 

components

 

may

 

necessitate

 

recalibration

 

of

 the 

affected

 

circuits. 

Complete

 calibration

 

instructions

 

are

 given

 

in the

 

Calibration 

section.

The

 

calibration 

procedure

 

can 

also

 be

 

helpful

 

in 

localizing 

certain

 

troubles 

in

 the

 

instrument. 

In 

some

 

cases, 

minor 

troubles may

 be

 

revealed

 

and/or

 

corrected

 by

 recalibration.

TROUBLESHOOTING

Introduction

The

 

following

 

information,

 

is

 

provided

 to

 

facilitate

 

trouble­

shooting

 

of

 

the

 

Type 

3B5,

 

if

 

trouble

 

develops. Information

 

contained

 

in 

other

 

sections 

of

 

this

 

manual should 

be

 

used 

along 

with

 

the

 

following 

information

 

to

 

aid 

in

 

locating 

the 

defective

 

component.

 

An

 

understanding

 of

 the

 

circuit opera

­

4-1

Содержание 3B5

Страница 1: ...NSTRUCTION MANUAL Serial Number_____________ TYPE 3B5 AUTOMATIC PROGRAMMABLE TIME BASE Tektronix Inc S W Millikan Way P O Box 500 Beaverton Oregon 97005 Phone 644 0161 Cables Tektronix 070 0538 00 666...

Страница 2: ...e all requests for repairs and re placement parts should be directed to the Tektronix Field Office or representative in your area This procedure will assure you the fastest possible service Please inc...

Страница 3: ...ion 7 Electrical Parts List Mechanical Parts List Information Section 8 Mechanical Parts List I j Section 9 Diagrams Mechanical Parts List Illustrations Accessories this manual Abbreviations and symbo...

Страница 4: ...Fig 1 1 Type 3B5 Automatic Programmable Time Base unit Type 3B5...

Страница 5: ...ed for reference use and do not directly reflect the measurement capabilities of this instrument The Performance Check procedure given in Section 5 of this manual provides a convenient method of check...

Страница 6: ...agnified with the Delayed Sweep Magnifier Calibrated DELAY control selects portion to be magnified Basic sweep rates between 5 s and 10 s can be magnified 100 times basic sweep rates between 5 s and 1...

Страница 7: ...yed Sweep Magnifier OFF Terminal 33 X10 Terminal 34 X100 Terminal 36 Grounding zero volt digital logic to given terminal of PROGRAM connector activates function Magnifier Delay Analog current change b...

Страница 8: ...ith the frequency varied from 10 50 10 c s in one minute cycles Hold at any resonant point for three minutes If no resonant points are found vibrate at 51 c s for three minutes on each axis Instrument...

Страница 9: ...pe Whenever the Type 3B5 is transferred from one oscillo scope to another the sweep calibration should be checked and adjusted if necessary to provide accurate measurements with the complete system Se...

Страница 10: ...Operating Instructions Type 3B5 Fig 2 1 Front panel controls and connectors of the Type 3B5 I I I I I I I I I I I I I I I I I 2 2...

Страница 11: ...Seek Mode The instrument changes to the Seek Mode of operation when a seek command is received from the front panel SEEK button a remote seeking probe through the associated auto matic programmable a...

Страница 12: ...y should be between two and five divisions vertically with two to six cycles displayed horizontally 9 Push the Type 3B5 MAN button and check the display for three complete cycles More or less cycles m...

Страница 13: ...be stable Turn the LEVEL control throughout its range Note that the display disappears and the NOT TRIG D readout comes on after several degrees of rotation in either direction from the center point...

Страница 14: ...tment selects a nominal range of opera tion and the exact number of cycles displayed for a particular signal will vary due to the sweep rate selected by the Seek Circuit The sweep rate always increase...

Страница 15: ...Operating Instructions Type 3B5 TYPE 3B5 CONTROL SET UP CHART Fig 2 2 Control set up chart 2 7...

Страница 16: ...ntrol clockwise until the display is triggered at the correct DC level on the displayed signal Auto Triggering The sweep is automatically triggered in the INT AUTO position of the Trigger Function swi...

Страница 17: ...Operating Instructions Type 3B5 Fig 2 3 Effects of Trigger LEVEL control and CHANGE SLOPE button shown for internal triggering or external triggering from an in phase time related trigger signal 2 9...

Страница 18: ...period The start of the magnified portion can be positioned with the DELAY dial or external program delay to magnify any portion after 0 to 10 divisions delay from the start of the trace Delayed Sweep...

Страница 19: ...the single sweep position and press the reset button The reset light indicates when the Sweep Generator has been reset and the light goes out when the circuit is locked out at the end of the sweep Af...

Страница 20: ...after the amplifier unit has completed its cycle The Type 3B5 does not seek when the seek button on the amplifier unit is pressed When the Type 3B5 receives a seek command the seek circuits first see...

Страница 21: ...2 V 75 18 125 V 30 19 100V 1 Maximum available current when used with an amplifier unit which also draws maximum current Program logic Both digital and analog program logic levels are used in the Typ...

Страница 22: ...0 5 second 5 6 24 0 2 second 3 6 24 0 1 second 2 6 24 50 millisecond 5 8 23 20 millisecond 3 8 23 10 millisecond 2 8 23 5 millisecond 5 8 24 2 millisecond 3 8 24 1 millisecond 2 8 24 0 5 millisecond 5...

Страница 23: ...se the following procedure 1 Measure the time duration of one cycle of the signal as described in the previous application 2 Frequency of the signal is the reciprocal of the time duration of one cycle...

Страница 24: ...channel signals may be of opposite polarity due to 180 delay if so take into account in final delay calculation 4 Set the volts division switches to produce four or five division displays 5 Set the Ty...

Страница 25: ...tion is positioned to the start of the second pulse Again note the dial reading 8 Subtract the first DELAY dial reading from the second and multiply by the sweep rate indicated by the MANUAL TIME DIV...

Страница 26: ...eform shows the area of interest magnified 10 times with the delayed sweep magnifier The DELAY dial has been adjusted so the magnifier starts just before the area of interest The display has been repo...

Страница 27: ...ce if so take into account in final calculation 5 Set the volts division switches and the variable volts division controls so the displays are equal and about five divisions in amplitude 6 Set the Typ...

Страница 28: ...agnified sweep rate is determined by dividing the sweep rate obtained previously by the magnification Example If the sweep rate were increased 10 times with the magnifier the magnified sweep rate woul...

Страница 29: ...The sweep rate is controlled by the MANUAL TIME DIV switch for Manual Mode operation or by the Counter Circuit for Seek and External Mode operation The amount of delay before sweep magnification begin...

Страница 30: ...se circuits which control external mode operation and Manual or Seek Mode operation is locked out Sweep rate delayed sweep mag nification delay horizontal position trigger mode source coupling slope a...

Страница 31: ...Fig 3 1 Simplified block diagram of Type 3B5 To Oscilloscope Deflection Plates GO i GO Circuit Description Type 3B5...

Страница 32: ...co k Fig 3 2 Manual Mode operation conventional time base Shaded blocks are operative To Oscilloscope Deflection Plates Circuit Description Type 3B5...

Страница 33: ...Fig 3 3 Seek Mode operation automatic seeking Shaded blocks are operative To Oscilloscope Deflection Plates CO Ui Circuit Description Type 3B5...

Страница 34: ...advances the Counter Circuit and the Delay and Timing Circuit to the next faster sweep rate and a sweep reset pulse resets the Sweep Generator so it starts over at the left side of the graticule at t...

Страница 35: ...Fig 3 5 External Mode operation programmable Shaded blocks are operative To Oscilloscope Deflection Plates co SI Circuit Description Type 3B5...

Страница 36: ...Q74 Q84 LEVEL Auto Trigger Multivibrator Q75 Q85 Trigger Shaper QI 04 D105 DI 15 Auto Trigger P P Level Q33 Q34 n _ CHANGE qI SLOPE SW50 Trigger Function TRIG LEVEL CENTERING r o o o Trigger Latch Cir...

Страница 37: ...e triggered from either the negative going or positive going slope of the input signal by producing the trigger pulse from either the inverted signal at the collector of Q74 or the uninverted signal a...

Страница 38: ...wer for explanation of how External Power is obtained Q85 is reverse biased by this negative voltage at its base and positive slope triggering is established Operation of the remainder of the circuit...

Страница 39: ...ltage of the input signal across R25B at all times Due to some losses in the circuit this voltage will be slightly lower than the total this positive level When the signal goes negative D23 is peak to...

Страница 40: ...s for cor rect triggering as set by front panel controls A Triggered 1 Trigger Latch Circuit remains on and unit operates as set by the front panel controls Stable CRT display presented 2 If the unit...

Страница 41: ...he logic diodes for auto triggering The level control current from the front panel LEVEL control is shunted away from the Trigger Level Amplifier No connec tions are made to K3 or K4 so no control cur...

Страница 42: ...ircuit operates as described for INT AC In the EXT DC position of SW50 the near ground potential at the collector of Q54 is connected to the anode of D45 Current flows through K4 and K4 1 closes to pr...

Страница 43: ...ough D42 Fig 3 11 shows the condition of the logic diodes for external level control Zero volt logic to terminal 31 also raises the potential at the base of Q44 and it conducts The Auto Trigger light...

Страница 44: ...ooth for horizontal sweep When the current flow through the Disconnect Diode is interrupted by the sweep gate signal the Timing Capaci tor begins to charge through the Timing Resistor The Timing Capac...

Страница 45: ...m Logic Decade Logic a f Sweep to Horizontal Amplifier Sweep Out to Vertical Unit Unblanking Pulse to CRT Alternate Trace Sync Pulse to Vertical Unit Sweep Gate to Seek Circuit Sweep Out External Hold...

Страница 46: ...and attempt to turn it off and turn Q235 back on However Q235 will not come back into conduction unless its base is near the level where it would normally turn on Then the positive pulse at the base o...

Страница 47: ...ator circuit is automatically retriggered after the end of each holdoff period and a free running sweep is produced Since this trace free runs at the sweep rate produced by the Sweep Generator it is a...

Страница 48: ...CO I o Fig 3 13 Delay and Timing Circuit logic block diagram Circuit Description Type 3B5...

Страница 49: ...f Q346 at about 6 volts Now when the sawtooth starts to run up it must offset this extra current supplied by Q333 before Q346 can switch This will be near the positive peak of the sawtooth to turn on...

Страница 50: ...ng group that is charging the Timing Capacitor as determined by the multiplier logic The timing current in the other two timing groups is shunted away from the timing capacitor For example Fig 3 15 sh...

Страница 51: ...Circuit Description Type 3B5 Fig 3 14 Timing resistor for Xi magnification DLY D SWP MAG switch at OFF Sweep rate 1 millisecond division 3 23...

Страница 52: ...Circuit Description Type 3B5 Fig 3 15 Timing resistor for X10 delayed swdep magnification Magnified sweep rate 0 1 millisecond division 3 24...

Страница 53: ...Circuit Description Type 3B5 Fig 3 16 Timing resistor for X100 delayed swe p rr agnification Magnified sweep rate 10 microseconds division 3 25...

Страница 54: ...near zero also Now as the X10 Magnifier Gate switches off the collector of Q374 rises positive to about zero volts The grid of the indicator oscilloscope CRT is raised more positive to provide a brig...

Страница 55: ...23 to establish a negative bias level at the base of Q514 By adding cur rent through terminal 14 the desired external program hori zontal position can be established Notice that the front panel POSITI...

Страница 56: ...mbination provide Manual Mode magnifier decoding For example when the MANUAL TIME DIV switch is in the 5 s position and the DLY D SWP MAG switch is set to X1 there is no output from the decade readout...

Страница 57: ...Q473 remains off because the decade logic current is shunted by D471 This logic combination provides a readout of_____ ms DIV with the multiplier provided by the Multiplier Readout stage X100 delayed...

Страница 58: ...I Circuit Description Type 3B5 Fig 3 19 Decade readout current for 1 2 and 5 millisecond sweep rates X1 sweep magnification I I I I I I I I I I I I I I I I I 3 30 I...

Страница 59: ...Circuit Description Type 3B5 fi I I I I I I I I I I I I I 1 I I I I Fig 3 20 Decade readout current for 0 1 0 2 and 0 5 mil isecond magnified sweep rates X10 delayed sweep magnification 3 31...

Страница 60: ...Circuit Description Type 3B5 Fig 3 21 Decade readout current for 10 20 and 50 microsecond magnified sweep rates X100 delayed sweep magnification I I I I I I I I I I I I I I 1 I I I I 3 32...

Страница 61: ...GO i GO GO Fig 3 22 Seek Ciicuit Logic block diagram Circuit Description Type 3B5...

Страница 62: ...applied 3B5 seeks to 0 2 ms DIV CYCLES SWEEP adjustment set according to Calibration procedure Input Signal Seek mono pulse at pin 8 of J400 Trigger pulse at junction of D105 and DI 15 and window gate...

Страница 63: ...pulses at pin 11 of J400 5 volts div 50 ms div 5 volts div 50 ms div Resultant CRT display Repetition rate of these waveforms 4s a function of sweep range CYCLES SWEEP adjustment and holdoff time Fig...

Страница 64: ...vels D640 and D641 comprise an and gate for the 1 multiplier and 0 1 s decade h logic levels When both of these logic levels are 12 volts the base of the Advance Gate stage goes negative and succeedin...

Страница 65: ...from the Seek Circuit The first set of waveforms shows circuit conditions with a 1 kHz sine wave applied CYCLES SWEEP adjustment set according to Calibration Procedure The second set of wave forms sh...

Страница 66: ...Circuit Description Type 3B5 Fig 3 24 Counter Ci cuit Logic block diagram Fig 3 25 Multiplier Counte circuit conditions for 5 output I I I I I I I I I I I I I I I I I I I 3 38...

Страница 67: ...Circuit Description Type 3B5 Fig 3 26 Multiplier Counter circuit conditions for 2 output Fig 3 27 Multiplier Counter circuit conditions for 1 output 3 39...

Страница 68: ...l change at its collector is coupled to the base of Q755 through C856 and R753 The collector of Q755 goes negative to lock out the remaining transistors in the B group The decade logic output on the 0...

Страница 69: ...current of Q905 flows through B905 and the SEEK pushbutton lights up This bulb drops about six volts of the 12 volt level at the col lector of Q905 to provide current to the 6 volt output line Current...

Страница 70: ...u k KJ Fig 3 29 Circuit conditions for Manual Mode operation Circuit Description Type 3B5...

Страница 71: ...w K w Fig 3 30 Circuit conditions for Seek Mode operation Circuit Description Type 3B5...

Страница 72: ...w I u U Fig 3 31 Circuit condition for External Mode operation Circuit Description Type 3B5...

Страница 73: ...eration For External Mode operation the bias level is disconnected from Q944 and the circuit is controlled by external program magnifier logic through terminal 33 34 or 36 of J30 However circuit opera...

Страница 74: ...ce there is no pull down resistor on the Xi00 magnifier logic line Readout Board The Readout Board circuit shown on diagram 10 shows the connection to this board and the bulbs which produce the readou...

Страница 75: ...in narrow spaces or for cleaning ceramic terminal strips and circuit boards Lubrication The reliability of potentiometers rotary switches and other moving parts can be maintained if they are kept prop...

Страница 76: ...es the wiring color code for the power supply voltages used in the Type 3B5 Resistor Color Code In addition to the brown composi tion resistors some metal film resistors identifiable by their gray or...

Страница 77: ...ender Tektronix Part No 012 0078 00 Purpose Permits access to the circuit cards in this unit Troubleshooting Techniques This troubleshooting procedure is arranged in an order which checks the simple t...

Страница 78: ...e used to take these readings see the test conditions in the Diagram section TABLE 4 3 Circuit Isolation T oubleshooting Guide Preliminary setup 1 Remove the Counter Card and Logic Card 2 Replace the...

Страница 79: ...he resistance and voltage are correct the coil can be assumed to be correct check the reed relay position and continuity 4 If the resistance is incorrect take into account surrounding circuitry discon...

Страница 80: ...ceramic terminal strips However if ordinary solder is used repeatedly or if excessive heat is applied the solder to ceramic bond may be broken Solder containing 3 silver is usually available locally...

Страница 81: ...sitioned the pin connectors may be damaged Circuit Card Replacement If one of the plug in circuit cards is damaged and cannot be repaired it should be replaced with a new circuit card Replacement card...

Страница 82: ...he same physical position as the old one 3 Position the leads correctly and solder the new reed relay to the solder posts old reed relay leads Avoid exces sive heat on the reed relay use a heat sink o...

Страница 83: ...ront panel with one hand and slide the entire assembly to the rear as far as the cabling allows 6 Reverse the order of removal to reassemble the unit Guide the CAL adjustment extension into the front...

Страница 84: ...Maintenance Type 3B5 Fig 4 5 Location of circuit boards and cards in ths Type 3B5 see Figs 4 6 to 4 13 for component location 4 10...

Страница 85: ...I Maintenance Type 3B5 I I I I I I I I I I I I I I I I I Fig 4 6 Location of componerts on rear of Time Base circuit board I 4 11...

Страница 86: ...nance Type 3B5 Fig 4 7 Location of components on Time Base circuit and Timing Circuit shown board partial Sweep Trigger I I I I I I I partial Operating Mode Power and partial Delay I I I I I I I I I I...

Страница 87: ...Maintenance Type 3B5 Fig 4 8 Location of components on Time Base circuit board partial Partial Delay and Timing Circuit Sweep Generator and Horizontal Amplifier shown 4 13...

Страница 88: ...Maintenance Type 3B5 Fig 4 9 Location of components on Logic Card 4 14...

Страница 89: ...u Oi Fig 4 10 Location of components on Counter Card Maintenance Type 3B5...

Страница 90: ...Maintenance Type 3B5 Fig 4 11 Location of ccmponents on Control Board I I I I I 1 1 1 I I I I I I I I I I I 4 16...

Страница 91: ...Maintenance Type 3B5 fi I I I I I I I I I I I I I I I I I I Fig 4 13 Location of omponents on Readout Board 4 17...

Страница 92: ...NOTES I...

Страница 93: ...within 3 from 10 Hz to 2 MHz For example General Radio 1310 A Oscillator 6 Time mark generator Marker outputs 5 seconds to 20 nanoseconds accuracy within 0 1 Tektronix Type 184 Time Mark Generator re...

Страница 94: ...l Range REQUIREMENT EXT AC checked as part of step 1 EXT DC at least and 10 volts a Set the LEVEL control to midrange b Set the low frequency sine wave generator for a two division CRT display 20 volt...

Страница 95: ...CRT display starts on the negative slope of the signal see Fig 5 1 and the slope light is on g Set the Trigger Function switch to EXT DC h Press the CHANGE SLOPE button to provide slope triggering i T...

Страница 96: ...nd slope triggering u Disconnect all test equipment Fig 5 2 Typical CRT display showing correct basic timing e CHECK CRT display for one marker each division between the first and ninth vertical grati...

Страница 97: ...V within 3 of full scale at all other sweep rates includes incremental linearity NOTE See Section 6 steps 10 and 11 for verification of DELAY dial incremental linearity a Set the time mark generator f...

Страница 98: ...t the leading edge of the applicable marker Check for 15 minor dial divi sions or less deviation between the major dial division and the dial setting which produces the correct display 3 of full scale...

Страница 99: ...e POSITION control see Fig 5 7A d Set the MANUAL TIME DIV switch to 50 ns e CHECK Marker should remain within 1 division of the first graticule line see Fig 5 7B 13 Check Normal and Magnified Timing A...

Страница 100: ...s DIV 5 s DIV 5 s DIV 1 3 10 s 10 s 1 s 0 1 s 10 is 10 s DIV 1 s DIV 1 s DIV 1 3 20 s 10 s 1 s 0 1 s 10 i s 20 s DIV 2 s DIV 2 s DIV 2 3 50 s 50 s 5 s 0 5 s 10 is 50 s DIV 5 zs DIV 5 s DIV 1 3 1 ms 0...

Страница 101: ...programmable amplifier unit input connector b Connect the probe tip to the indicator oscilloscope calibrator output connector c Press the seek button on the remote seeking probe d CHECK Both the ampl...

Страница 102: ...DLY D SWP MAG switch to OFF b Connect the 10X probe to the test oscilloscope input c Set the test oscilloscope for a vertical deflection of 0 05 volt division 0 5 volt division including 10X probe and...

Страница 103: ...rminals 7 and 18 Caution 125 volts of the PROGRAM connector If using special circuit set switch to single sweep f CHECK A trace is not displayed but the NOT TRIG D readout remains off g Connect a jump...

Страница 104: ...NOTES...

Страница 105: ...x Type 191 Constant Amplitude Signal Generator recommended 5 Low frequency sine wave generator Frequency 10 Hz to 2 MHz output amplitude 0 5 to 40 volts peak to peak amplitude accuracy within 3 from 1...

Страница 106: ...Calibration Type 3B5 Fig 6 1 Recommended calibration equipment...

Страница 107: ...crosecond Timing C168 Page 6 13 Correct timing at 1 s DIV 15 Adjust 10 Microsecond Timing C315 Page 6 14 Correct timing at 10 s DIV 22 16 Adjust 0 1 Microsecond Timing C502 Page 6 15 Correct timing at...

Страница 108: ...djustment is made To prevent recalibration of other circuits when performing a partial cali bration readjust only if the listed tolerance is not met How ever when performing a complete calibration bes...

Страница 109: ...le Connect the output of the BNC T connector to the Type 3B5 EXT TRIG INPUT connector with a BNC cable c Set the low frequency sine wave generator for a four division CRT display 40 volts peak to peak...

Страница 110: ...y clockwise g CHECK Stable CRT display for both and slope triggering h ADJUST Auto Trigger Centering adjustment R35 for stable CRT display of both 4 and slope triggering Fig 6 3 Location of TRIG LEVEL...

Страница 111: ...k Set the Trigger Function switch to INT AUTO l CHECK Stable CRT display can be obtained with the LEVEL control for both 4 and slope triggering throughout the complete rotation of the LEVEL control 5...

Страница 112: ...onnect the output of the BNC T connector to the Type 3B5 EXT TRIG INPUT connector with a 50 ohm BNC cable c Set the constant amplitude generator for a 0 5 division CRT display 0 5 volt peak to peak at...

Страница 113: ...ction switch to EXT DC o CHECK Stable CRT display can be obtained with the LEVEL control for both and slope triggering p Without changing the output amplitude set the con stant amplitude generator to...

Страница 114: ...for one millisecond markers d Position the second marker to the first graticule line with the POSITION control e CHECK CRT display for one marker each division between the first and ninth graticule li...

Страница 115: ...k Sweep Length a Set the time mark generator for one millisecond and 0 1 millisecond marker output b Position the eleventh one millisecond marker to the cen ter vertical line with the POSITION control...

Страница 116: ...Delay Dial Incremental Linearity and Accuracy a Set the DELAY dial to 2 00 and then rotate the dial as necessary so the magnified portion starts at the leading edge of the second marker b CHECK DELAY...

Страница 117: ...ivision 3 parts or less per 10 000 see Fig 6 12B 13 Adjust One Second Timing a Set the time mark generator for one second markers b Change the following control settings DLY D SWP MAG MANUAL TIME DIV...

Страница 118: ...15 Adjust 10 Microsecond Timing a Set the time mark generator for 10 microsecond markers b Set the MANUAL TIME DIV switch to 10 s c CHECK CRT display for one marker each division between the first and...

Страница 119: ...TIME DIV switch to 0 1 s c Set the LEVEL control for a triggered display d CHECK CRT display for one marker each division between the first and ninth vertical graticule lines second and tenth marker...

Страница 120: ...Calibration Type 3B5 A 0 1 s Cal C502 Fig 6 16 A Typical CRT display showing correct 0 1 microse ond timing IB Location of 0 1 s Cal adjustment Time Base Board NOTES 6 16...

Страница 121: ...y Compensation NOTE The Type 3B5 must not be on an extender for steps 17 through 21 Also the amplifier unit must have a bandpass of at least 10 MHz to check these steps a Test equipment setup is shown...

Страница 122: ...g out at the top of the waveform A typical test oscilloscope display is shown in Fig 6 18B NOTE This is a preliminary adjustment for optimum high frequency response Further adjustment to provide Time...

Страница 123: ...DJUST 50 ns Cal adjustment R508 see Fig 6 20B for one marker each division h Set the time mark generator for 20 nanosecond markers i Set the MANUAL TIME DIV switch to 20 ns j Move the nearest marker t...

Страница 124: ...Note readjust only if out side the tolerances listed in step b d If adjustments are made recheck step 19 21 Check Normal and Magnified Timing Accuracy a Connect the time mark generator trigger output...

Страница 125: ...s 10 zs 1 s 0 1 ms 2 ms DIV 20 s DIV 2 s DIV 2 3 5 ms 0 5 ms 50 zs 5 s 0 1 ms 5 ms DIV 50 s DIV 5 s DIV 1 3 1 ms 1 ms 0 1 ms 10 s 1 ms 1 ms DIV 0 1 ms DIV 10 zs DIV 1 3 2 ms 1 ms 0 1 ms 10 s 1 ms 2 ms...

Страница 126: ...and ninth graticule lines A typical CRT display is shown in Fig 6 22 CAUTION To prevent permanent damage to the CRT phos phor either reduce the trace intensity at slow sweep rates to a level which doe...

Страница 127: ...ed g Press the EXT button momentarily h CHECK EXT button lights as long as it is held depressed i Release the EXT button j CHECK MAN button lights and a stable display is presented 23 Check Seek Mono...

Страница 128: ...n the negative slope d Press the MAN button e CHECK Test oscilloscope display for a 1 8 division window gate signal see Fig 6 25B f ADJUST CYCLES SWEEP adjustment R650 see Fig 6 25C so the window gate...

Страница 129: ...Check from 30 hertz to 2 megahertz e Disconnect the low frequency sine wave generator and connect the time mark generator to the amplifier unit through the 50 ohm BNC cable and the 50 ohm termination...

Страница 130: ...s to about 12 volts at the start of each sweep h Set the DLY D SWP MAG switch to X100 i CHECK Test oscilloscope display for a trace near the zero volt level during the magnified sweep time 29 Check Sa...

Страница 131: ...play for about three cycles of the sawtooth signal and a vertical deflection of one divi sion 0 1 division see Fig 6 29B 0 05 milliamp division 10 output from Type 3B5 30 Check Sawtooth Output to Ampl...

Страница 132: ...nector see Fig 6 32 to chassis ground b CHECK Meter reading approximately 12 2 volts c Connect the DC voltmeter from terminal 18 of the PRO GRAM connector see Fig 6 32 to chassis ground d CHECK Meter...

Страница 133: ...isplay when checking external horiiontal operation 33 Check External Horizontal Input a Connect a jumper lead wire from the indicator oscillo scope calibrator output connector to terminal 4 of the PRO...

Страница 134: ...is given here for checking the external programmed operation of this unit If a Tektronix external programmer is used a complete checkout procedure for the programmable functions is given in the Instr...

Страница 135: ...ystyrene EMC electrolytic metal cased prec precision EMT electrolytic metal tubular PT paper tubular ext external PTM paper or plastic tubular molded F 1 focus and intensity RHB round head brass FHB f...

Страница 136: ...g information in your order Part number instrument type or number serial or model number and modification number if applicable If a part you have ordered has been replaced with a new or improved part...

Страница 137: ...83 w red coating Incandescent 683 w red coating Incandescent 683 Incandescent 6835 Incandescent 6835 Incandescent 6835 Incandescent 6835 Incandescent 683 Incandescent 683 Incandescent 6835 Capacitors...

Страница 138: ...18 00 47 pF Cer 500 V C252 281 0518 00 47 pF Cer 500 V 100 172X C253 283 0079 00 0 01 F Cer 250 V C255 281 0525 00 470 pF Cer 500 V C257 281 0543 00 270 pF Cer 500 V 10 100 172 C257 281 0605 00 200 pF...

Страница 139: ...manium Tek Spec D45 152 0075 00 Germanium Tek Spec D46 152 0075 00 Germanium Tek Spec D52 152 0075 00 Germanium Tek Spec D54 152 0075 00 Germanium Tek Spec D56 152 0075 00 Germanium Tek Spec D62 152 0...

Страница 140: ...ermanium Tek Spec D264 152 0061 00 Silicon Tek Spec D265 152 0119 00 Zener 1N969A 0 4W 22V 10 100 279 D265 152 0281 00 Zener 1N969B 0 4W 22 V 5 280 up D269 152 0061 00 Silicon Tek Spec D272 152 0071 0...

Страница 141: ...00 Tunnel 1N3712 1mA D366 152 0076 00 Zener 1N4372 0 4 W 3 V 10 D367 152 0239 00 Silicon Tek Spec D368 152 0239 00 Silicon Tek Spec D369 152 0239 00 Silicon Tek Spec D371 152 0075 00 Germanium Tek Sp...

Страница 142: ...152 D531 152 0243 00 Zener 1N965B 0 4 W 15 V 5 D532 152 0071 00 Germanium ED 2007 D572 152 0166 00 Zener N753A 0 4 W 6 2 V 5 D909 152 0107 00 Silicon Replaceable by 1N647 D911 152 0075 00 Germanium Te...

Страница 143: ...260 0721 00 Reed Inductors L106 108 0215 00 1 1 H L139 108 0226 00 100 H L563 108 0165 00 4 7 mH L935 108 0359 00 100 H Transistors Q14 151 0155 00 Silicon Replaceable by 2N2925 Q23 151 0175 00 Silico...

Страница 144: ...by 2N2925 Q364 151 0162 00 Silicon 2N3324 Q374 151 0162 00 Silicon 2N3324 Q404 151 0183 00 Silicon Selected from 2N2192 Q514 151 0190 00 Silicon 2N3904 Q534 151 0188 00 Silicon 2N3906 Q543 151 0190 00...

Страница 145: ...0124 00 120 k W 5 R63 323 0366 00 63 4 k 1 2 W Prec 1 R69 315 0332 00 3 3 k W 5 R71 315 0332 00 3 3 k W 5 R71 315 0182 00 1 8 k W 5 R72 316 0564 00 560 k W R74 315 0163 00 16 k W 5 R75 315 0752 00 7 5...

Страница 146: ...5 R174 315 0101 00 100 W 5 R175 303 0333 00 33 k 1 W 5 R176 315 0101 00 100 W 5 R179 315 0101 00 100 W 5 R181 315 0103 00 10 k W 5 R182 315 0103 00 10 k W 5 R183 315 0184 00 180 k W 5 R184 315 0154 00...

Страница 147: ...0 3 9 k W 5 173 up R258 315 0102 00 1 k W 5 R259 315 0222 00 2 2 k W 5 R262 315 0821 00 820 W 5 R263 315 0562 00 5 6 k W 5 R265 301 0362 00 3 6 k 1 2 W 5 R268 310 0632 00 30 k 4W Prec 1 R272 315 0101...

Страница 148: ...0 3 3 k W 5 R373 315 0563 00 56 k W 5 R374 308 0407 00 12 k 3 W WW 5 R381 309 0023 00 2 M 1 2 W Prec 1 R382 323 0418 00 22 1 k 1 2 W Prec 1 R383 324 0322 00 22 1 k 1 W Prec 1 R384 309 0093 00 4 M 1 2...

Страница 149: ...31 00 301 k 1 8 W Prec 1 R542 315 0102 00 1 k W 5 R543 315 0104 00 100 k W 5 R544 310 0619 00 13 5 k 4W Prec 1 R546 323 0400 00 143 k 1 2 W Prec 1 R549 315 0181 00 180 W 5 R551 321 0277 00 7 5 k 1 8 W...

Страница 150: ...EXT SW940 260 0776 00 Lever DLY D SWP MAG Transformers T140 120 0180 00 Toroid 4 turns trifilar T275 276 0557 00 Core Toroid Ferrite Electron Tubes VI63 157 0080 00 7586 aged V544 154 0047 00 12BY7 V...

Страница 151: ...ermanium Tek Spec D425 152 0075 00 Germanium Tek Spec D427 152 0075 00 Germanium Tek Spec D428 152 0075 00 Germanium Tek Spec D431 152 0075 00 Germanium Tek Spec D432 152 0075 00 Germanium Tek Spec D4...

Страница 152: ...00 Germanium Tek Spec D629 152 0075 00 Germanium Tek Spec D632 152 0075 00 Germanium Tek Spec D635 152 0075 00 Germanium Tek Spec D640 152 0075 00 Germanium Tek Spec D641 152 0075 00 Germanium Tek Sp...

Страница 153: ...on Selected from 2N2192 Q925 151 0183 00 Silicon Selected from 2N2192 Resistors Resistors are fixed composition 10 unless otherwise indicated R411 315 0222 00 2 2 k W 5 R412 315 0222 00 2 2 k W 5 R413...

Страница 154: ...641 315 0104 00 100 k W 5 R643 315 0224 00 220 k W 5 R645 315 0222 00 2 2 k W 5 R646 315 0333 00 33 k W 5 R653 315 0102 00 1 k W 5 R654 315 0122 00 1 2 k W 5 R655 315 0561 00 560 W 5 R657 315 0561 00...

Страница 155: ...Cer 250 V C812 283 0026 00 0 2 F Cer 25 V C817 283 0079 00 0 01 F Cer 250 V C822 283 0026 00 0 2 F Cer 25 V C827 283 0079 00 0 01 F Cer 250 V C856 283 0079 00 0 01 F Cer 250 V C866 283 0079 00 0 01 F...

Страница 156: ...ec D781 152 0075 00 Germanium Tek Spec D782 152 0075 00 Germanium Tek Spec D783 152 0075 00 Germanium Tek Spec D784 152 0075 00 Germanium Tek Spec D785 152 0075 00 Germanium Tek Spec D786 152 0075 00...

Страница 157: ...151 0183 00 Silicon Selected from 2N2192 Q785 151 0183 00 Silicon Selected from 2N2192 Q815 151 0183 00 Silicon Selected from 2N2192 Q825 151 0183 00 Silicon Selected from 2N2192 Q855 151 0183 00 Sil...

Страница 158: ...R771 315 0222 00 2 2 k W 5 R772 315 0222 00 2 2 k W 5 R773 315 0222 00 2 2 k W 5 R774 315 0104 00 100 k W 5 R775 315 0222 00 2 2 k W 5 R781 315 0222 00 2 2 k W 5 R782 315 0222 00 2 2 k W 5 R783 315 02...

Страница 159: ...315 0222 00 2 2 k W 5 R864 315 0104 00 100 k W 5 R865 315 0222 00 2 2 k W 5 R871 315 0222 00 2 2 k W 5 R872 315 0222 00 2 2 k W 5 R873 315 0222 00 2 2 k W 5 R874 315 0104 00 100 k W 5 R875 315 0222 00...

Страница 160: ......

Страница 161: ...ust be purchased separately unless otherwise specified PARTS ORDERING INFORMATION Replacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tek...

Страница 162: ...Mechanical Parts List Type 3B5 INDEX OF MECHANICAL PARTS LIST ILLUSTRATIONS Located behind diagrams FIG 1 FRONT SWITCHES FIG 2 CHASSIS REAR FIG 3 ACCESSORIES...

Страница 163: ...0 0012 00 1 14 210 0840 00 1 15 210 0413 00 1 16 406 0023 00 1 17 211 0504 00 2 ROD extension ASSEMBLY coupling flexible assembly includes RING diameter x 0 172 inch long RING diameter x 0 437 inch lo...

Страница 164: ...TCH unwired DLY D SWP MAG mojnting hardware not included w switch 35 220 0413 00 2 NUT hex 4 40 x 3 14 x 0 562 inch long 36 131 0106 00 1 CONNECTOR coaxial 1 contact BNC mojnting hardware not included...

Страница 165: ...re not included w connector 61 210 0004 00 1 LOCKWASHER internal 4 210 0201 00 1 LUG solder SE 4 62 210 0406 00 2 NUT hex 4 40 x 3 16 inch 211 0099 00 X230 279 2 SCREW 4 40 x 5 i6 inch 211 0038 00 280...

Страница 166: ...inch RESISTOR variable mounting hardware for each not included w resistor WASHER flat 4 IDx inch OD NUT hex 4 32xs u inch PLATE bulkhead slate includes SCREW 4 40 x 2 inch THS GFOMMET plastic 2 inch...

Страница 167: ...x s w inch ASSEMBLY coupling flexible assembly includes RING 3 s diameter x 0 172 inch long COUPLING plastic SCREW set 4 40 x 3 14 inch HSS ROD extension ASSEMBLY circuit board CONTROL assembly inclu...

Страница 168: ...board TIME BASE assembly includes SCCKET transistor 3 pin SCCKET transistor 3 pin SC CKET tube 9 pin SCCKET tube ceramic 9 pin SCCKET nuvistor 5 pin SCCKET transistor 6 pin CONNECTOR square pin CL P...

Страница 169: ...nt Front side or rear panel control or connector Clockwise control rotation in direction of arrow Refer to indicated diagram Connection to circuit board made with pin connector at indicated pin Connec...

Страница 170: ...e Type 3B5 chassis ground Recommended type as used for voltages on diagrams Simpson Type 262 Type 3B5 Conditions Line Voltage 115 volts Signal applied None Connectors No connections Trace position Cen...

Страница 171: ...TER 0443 _ Q453 0473 TRIGGER LEVEL AMPLIFIER RANGE SLOPE IDELAYI DELAY COMPARATOR Q333 Q34 QS43 035 Q344 TIMING CIRCUIT 4 MAGNIFIER GATES Q324 Q3 4 D3 5 SAWTOOTH SWEEP GENERATOR VIG3 Qifcl QI93 QI74 E...

Страница 172: ...12 2 V TRIGGER PULSE I25V DEC IOOV DEC V w TRIG LEVEL CENTERING H e DIO 5 4 TRIGGER FUNCTION I SW5O 7 COUNTER CIRCUIT OPERATING MODE POWER INTERCONNECTING DIAGRAM 2 SWEEP GENERATOR SEEK CIRCUIT EXT TR...

Страница 173: ...__ 4125V I F q REG2 VOLTAGES and WAVEFORMS obtained under conditions given onDiagram except as follows TR GGER FUNCTION INT AC tHHlDLY D SWP MAG X10 or XIOO 1Z i AZ FROM COLL 7 55 11 2 4 4188V RIGS 0...

Страница 174: ...RTIAL READOUT BOARO 0 FOR TYPES XI FROM VOLTAGE8 and WAVEFORMS obtained under eauttUons given an Diacram except ae follove DLY D 8WP MAO JC10 WLTD SWP MAG XIOO EXT IOOV PWR 12 2V 12 2V DELAY TIMING CI...

Страница 175: ...MODE POWER INTERCONNECTING DIAGRAM SEE PARTS LIST FOR SEMICONDUCTOR TYPES R5SI _ OSSI 7 5KS 7 5 5 16 I RSS2 54 9K IOOV VOLTAGES and WAVEFORMS obtained under conditions given on Diagramexcept as follo...

Страница 176: ...J400 RtADOUT BOARD 3B5 PLUG IN A READOUT...

Страница 177: ...ns given on Diagram L except as follows KTRIGGER FUNCTION INT AC NOTE Operating waveforms for this circuit are shown in Section 3 _L CG3G z OI IOOK IOOV RG27 DG4O FROM 5W45O o iM K FROM CC I RG4I IOOK...

Страница 178: ...ns given on DiagramrfS except aa follows MOK SEEK Signal Applied SOOHa sinewave seeks to lma DIV SEE PARTS UST FOR COUNTER CARD SEMICONDUCTOR TYPES II KH 0725 0715 R7I3 C7I9 O e 3 27 13 I2 5R7OI 0731...

Страница 179: ...EXTERNAL POWER 12 2V B9O5 Q 7 EXTERNAL POWER 12 2V AD9OI R9 l 2 2K R9OA 2 2K yp9i9 man pwr 12 2V PARTIAL LOGIC CARD 0902 R9O2 2 2K R9O3 IK 12 2V 12 2V Q92S A LevPOW REFERENCE DIAGRAMS DELAY TIMING CI...

Страница 180: ...FROM AV II5VAC AVAILABLE DEPENDING ON SERIAL NUMBER OF INDICATOR UNIT 10 12 JZ 3 o xz xz EXTERNAL LOCKOUT TO ICYCLES SWEEP SWEEP GATE FROM SH TRIG SIGNAL TO CC SWEEP FROM TO CRT RIGHT DEFLECTION PLATE...

Страница 181: ...REFERENCE DIAGRAMS SWEEP GENERATOR DELAY 4 TIMING CIRCUIT READOUT LOGIC FROM DO FROM EE FROM 13 k______ I FROM FF TYPE 3B5 PLUG IN...

Страница 182: ...397 R E A D O U T B O A R D 10 6b READOUT BOARD...

Страница 183: ...R SWEEP GENERATOR DELAY 4 TIMING CIRCUIT HORIZONTAL AMPLIFIER 6 OPERATING MODE POWER INTERCONNECTING DIAGRAM SEE PARTS LIST FOR SEMICONDUCTOR TYPES TYPE 3B5 PLUG IN sit PARTS UST FOR EARUER VALUES AND...

Страница 184: ...FIG 1 FRONT SWITCHES TYPE 3B5 AUTOMATIC PROGRAMMABLE TIME BASE...

Страница 185: ...FIG 2 CHASSIS REAR 3 GS to TYPE 3B5 AUTOMATIC PROGRAMMABLE TIME BASE...

Страница 186: ...OPTIONAL ACCESSORIES...

Страница 187: ...al Model Eff No Disc Q t y Description 1 2 3 4 5 3 1 131 0422 00 i CONNECTOR 37 pin 2 200 0660 01 1 COVER plastic connector 3 213 0045 00 2 SCREW thread cutting 4 40 x 3 u inch 070 0538 00 2 MANUAL in...

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