Attrezzatura informazioni:

Tektronix R485 Oscilloscopio
Produttore:
Tektronix
Modello: R485
Data: 1978
Categoria: Strumenti di misura
Gruppo: Oscilloscopio
Descrizione:
Informazioni:
                                    

Questi manuali sono disponibili per l'attrezzatura di cui sopra:

Tipo manuale: Servizio e manuale utente Tektronix-8949-Manual-Page-1-Picture
Pagine: 192
Dimensioni: 30.84 Mbytes (32335934 Bytes)
Lingua: Inglese
Revisione:
Manual-ID/Number: 070-1193-00
Data: 01 gennaio 1978
Qualità: Documento scansionato, tutto leggibile.
Data di caricamento:
MD5: 52bcf61ada3d76812f0af2e51d5cbdb9
Download: 147 dal 23 aprile 2017
Informazioni:
TABLE OF CONTENTS
SPECIFICATION	Page

Introduction	1-1

Vertical Deflection System	1-1

Probe Performance	1-3

A and B Triggering	1-3

Horizontal Deflection	1-4

Calibrated Sweep Delay	1-4

X-Y	1-5

CRT	1-5

Calibrator	1-6

Other Characteristics	1-6

Environmental Characteristics	1-6
OPERATING INSTRUCTIONS

General	2-1

Preliminary Information	2-1

Controls and Connections	2-1

Front Panel	2-1

Rear Panel	2-4

Bottom Side	2-4
CIRCUIT DESCRIPTION

Introduction	3-1

50 n Attenuator	3-1

1 Megohm Buffer Amplifier	3-1

50 SI Overload Protection	3-1

Vertical Preamplifier	3-1

Signal Channel Switch	3-2

Internal Trigger Amplifier	3-2

Main Vertical Amplifier	3-2

Scale Factor Readout	3-3

Vertical Mode Control	3-3

Z Axis	3-3

A Trigger Amplifier	3-3

A EXT Trigger Identify	3-3

A Trigger Generator	3-4

B Trigger Generator	3-4

A and B Sweeps	3-4

Horizontal Amplifier	3-5

Horizontal Control	3-5

Power Inverter/Regulator	3-6

Line Filter	3-6

Line Input Circuit	3-6

Start Network	3-7

Inverter	3-8

Inverter/Regulator	3-8

Inverter Current Limiting Circuit	3-8

Overvoltage Stop Circuit	3-8

Line Stop Circuit and Surge Limiting	3-8 Procedure for
Converting the 485 to

DC Operation	3-9

Low Voltage Supplies	3-9

Power Supply Protection Circuit	3-10

Stop Monostable	3-10

Balance Node	3-10

Overcurrent Protection	3-12

Low Line Voltage Protection	3-12 Sampling Period Timer and Over-

Voltage Protection	3-12

CRT Circuit	3-12

Filament Voltage	3-12

High Voltage Supplies	3-12

Anode Supply	3-12

Cathode Supply	3-12

Cathode Regulator	3-12

Grid DC Restorer	3-13
SECTION 3 CIRCUIT DESCRIPTION (cont)	Page

Focus DC Restorer	3-13

Beam Current Limit	3-14 Power Supply Shutdown Caused by

Excessive Beam Current	3-14

CRT Control Circuits	3-14

Auto Focus Circuit	3-14

Calibrator	3-15
SECTION 4 MAINTENANCE

Introduction	4-1

Cover Removal and Reinstallation	4-1

Cleaning	4-1

Lubrication	4-2

Visual Inspection	4-3

Semiconductor Checks	4-3

Recalibration	4-3

Troubleshooting	4-3

Introduction	4-3

Troubleshooting Aids	4-3

Circuit Boards	4-3

Troubleshooting Equipment	4-5

Troubleshooting Techniques	4-6 Special Troubleshooting
Information 4-7

Corrective Maintenance	4-11

Obtaining Replacement Parts	4-11

Soldering Techniques	4-11

Component Replacement	4-12

Circuit Board Replacement	4-12

Timing Board Removal	4-12

Transformer Board Removal	4-13

Inverter Board Removal	4-14

Semiconductor Replacement	4-14

Circuit Board Pins	4-14

End Lead Pin Connectors	4-15

Cathode Ray Tube Replacement	4-15

Repackaging for Shipment	4-15 Interboard Comb Connection
Locations 4-16

SECTION 5 CALIBRATION

Introduction	5-1

TEKTRONIX Field Service	5-1

Using This Procedure	5-1

Test Equipment Required	5-1

Special Calibration Fixtures	5-1

Calibration Equipment Alternatives	5-4

Performance Check	5-4

Calibration Procedure	5-8
SECTION 6 RACKMOUNTING

Introduction	6-1

Rack Dimensions	6-1

Slide Out Tracks	6-1

Mounting Procedure	6-1

Alternate Rear Mounting Methods	6-2

Removing or Installing the Instrument	6-2

Slide Out Track Lubrication	6-2

SECTION 7 ELECTRICAL PARTS LIST
Tektronix-8949-Manual-Page-1-Picture


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