Informations sur l'appareil:

Leader LBO-308S Oscilloscopes
Fabricant:
Leader
Modèle: LBO-308S
Date:
Catégorie: Mètres
Groupe: Oscilloscopes
Description: Dual trace Oscilloscope
Information:
                                    The model LBO-308S is a high-quality dual-trace, 20-MHz
portable Oscilloscope ideally suited for field service. It
is an extremely compact, lightweight, general-purpose
instrument, designed to provide accurate signal measurements
for either bench or field service. The highly sensitive
vertical Amplifier provides calibrated deflection
sensitivity from 2 mV/div to 10 V/div. The time base
provides stable triggering over the full bandwidth of the
vertical Amplifier as well as calibrated sweep speeds from
0.2 sec/div to 0.5 µsec/div. A times 5 magnifier extends the
maximum sweep speed to 0.1 µsec/div.

The instrument may be operated from either 117/234 volts AC,
11 to 30 volts DC, or from battery pack.

The model LBO-308 features a 3-inch rectangular 8 X 10
division CRT, mounted horizontally, with an internal
graticule which provides for accurate and Sharp displays at
any viewing angle without parallax errors.

Ces manuels sont disponibles pour les équipements ci-dessus :

Type de document: Service et Manuel de l'utilisateur Leader-5693-Manual-Page-1-Picture
Nombre de pages: 68
Taille du fichier: 10.08 Mbytes (10568551 Bytes)
langue: Anglais
Révision:
Document ID/Numéro:
Date:
qualité: Document scanné, la lecture en partie mal, en partie illisible.
Chargé sur:
MD5: 89812c02ac34053256a280b048e04ae4
Téléchargements: 767 depuis 04 avril 2014
Information:
Leader-5693-Manual-Page-1-Picture


Type de document: Service et Manuel de l'utilisateur Leader-9525-Manual-Page-1-Picture
Nombre de pages: 68
Taille du fichier: 10.08 Mbytes (10568551 Bytes)
langue: Anglais
Révision:
Document ID/Numéro:
Date:
qualité: Document scanné, la lecture en partie mal, en partie illisible.
Chargé sur:
MD5: 5166d5902c572341aef26051561925a2
Téléchargements: 184 depuis 12 septembre 2017
Information:
1,	GENERAL
INFORMATION ... - • •	I

1-1 INTRODUCTION
 ...  •	1

1-2	SPECIFICATIONS
 ... 1

2.	OPERATING INSTRUCTIONS
 ... 	3

2.-1 FUNCTION OF CONTROLS, CONNECTORS, AND
INDICATORS ...  . . .	3

2-1-1 Display Block. . . . .
 ... 3

2-1-2 Vertical Amplifier
Block ... 3

2-1-3 Sweep and Trigger
Block ... 4

2-1-4
Miscellaneous ... 5

2-2	INITIAL OPERATION
 ... ____ ... 	5

2-2-1 Power Connections and Adjustments . . .
 ...  . .	5

AC
operation ...  .
. . .	5

DC
operation ... 7

LP-2054 battery pack ... 
 ... 7

2-2-2 Installation
 ... 	7

2-2-3 Preliminary Control Settings and Adjustments
 ... 7

2-3 BASIC OPERATING PROCEDURES
 ... 8

2-3-1 Singnal
Connections ... 8

2-3-2 Single-trace Operation
 ... 	9

2-3-3 Triggering
Alternatives ... 9

Trigger mode selection. .
 ... 9

Trigger source
options ... 	10

Trigger point selection.
 ... 	10

2-3-4 Probe Compensation and
Use ... 12

2-3-5 Dual-trace Operation. . .
 ...  .	12

2-3-6 Additive and Differential Operation
 ... 	14

2-3-7 X-Y Operation
 ... 	15

2-3-8 Intensity Modulation.
 ... 	15

2-4 MEASUREMENT APPLICATIONS .
_____ ... ____ ... 	15

2-4-1 Amplitude
Measurements ...  .	15

Peak-to-peak voltages
 ... 15

Instantaneous voltages.
 ... 16

2-4-2 Differential Measurement
Techniques ... 	16

2-4-3 Time Interval
Measurements ... 	16

Basic
technique ... 16

Period, pulse width, and duty cycle
 ... 	17

Lead and lag
time ... 	.18

2-4-4 Phase Difference Measurements19

Dual-trace method
 ... 19

Lissajous pattern method
 ... 	19

2-4-5 Distortion Comparison.
 ... 20

2-4-6 Frequency
Measurements ... 20

Reciprocal
method ...  . . .	20

Comparison method
 ... 	21

2-4-7 Risetime Measurements
 ...  . .  ... 22
3. PERFORMANCE CHECK
 ... 23

3-1 INTRODUCTION
 ... 23

3-2 TEST EQUIPMENT REQUIRED ... - ...  ■
 ... 23

3-3 PRELIMINARY
PROCEDURE ... • ... 23

3-3-1 Equipment Preparation
 ... 23

3-3-2 Initial Control
Settings ... 23

3-4 DEFLECTION ACCURACY
 ... 24

3-4-1 Equipment
Required ... ^4

3-4-2 C 1:1-1 and CH-2 Deflection Accuracy
 ... 	24

3-4-3 X-axis
Gain ... 24

3-5 BANDWIDTH .  ... 
 ... 24

3-5-1 Equipment Required ... 
 ... 24

3-5-2 CH-1'and CH-2 Bandwidth
 ... 	24

3-5-3 X-Axis Bandwidth. . . .
 ... 25

3-6 TRIGGERING
 ... 25

3-6-1 Equipment
Required ... 25

3-6-2 50-Hz Triggering.
 ... - ... 25

3-6-3 20-MHz
Triggering ... 25

3-6-4 Z-Axis Modulation . . . .
 ... 27

3-7 SWEEP TIME ACCURACY
 ... 27

3-7-1 Equipment Required
 ... 27

3-7-2 Sweep Time Accuracy  ... 
 ... 27

3-7-3 Magnified Sweep
Accuracy ... 27

3-8 TV TIGGERING.
 ... ---- ... 	28

3-8-1 Equipment
Required ... 28

3-8-2 TV Sync
Triggering ... 28

3-9 X-Y MODE DIFFERENCE •
 ... 28

3-9-1 Equipment
Required ... 28

3-9-2 Phase
Measurement ... 	28

4, ADJUSTMENT AND CALIBRATION PROCEDURES
 ... 	30

4-1. PREPARATION
 ... 30

4-1-1 Test Equipment and Tools .
 ... 30

4-1-2 Disassembly.
 ... 	30

4-1-3 Warmup and Preliminary
Set-up ... 30

4-2 POWER. SUPPLY . „ .
 ... 
 ... 30

4-2-1 Voltage Checks and Adjustments	30

4-2-2 Battery Lower-Limit
Adjustment ... 31

4-2-3 Charge Rate Adjustment
 ... 31

4-3 DISPLAY
CIRCUITS ... 	31

4-3-1 Blanking
Circuits ... 31

4-3-2 Intensity Range
Adjustment ... 3.1.

4-3-3 Geometry
Adjustment ... 	31

4-3-4 Astigmatism
Adjustment ... 32

4-3-5 Z-Axis Modulation. Check. . . . .
 ... 32

4-4 VERTICAL Amplifier
 ... 33

4-4-1 Step Attenuator Balance Adjustment
 ... 	33

4-4-2 Balance
Adjustment ... 33
4-4-3 ADD Ba.lao.ce Adjustment ... 

44-4 Output Amplifier Adjustments ... 

44-5 Gain Calibration  ... 

44-6 Step Response and Frequency Check. .

4-5 TIMEBASE  ... 

4-5-1. TIME/DIVCalibration. . . .  ... 

4-5-2 Horizontal Position Centering  ... 

4-5-3 Sweep Length. Adjustment  ... 

4-6 TRIGGER CIRCUIT  ... 

4-6-! LEVEL Balance Adjustment.  ... 

4-6-2 Trigger Sensitivity Checks.  ... 

4-7 X-Y CIRCUITRY  ... 

4-8 CALIBRATION  ... 

REPLACEMENT PARTS LIST  ... 

BLOCK DIAGRAM AND SCHEMATICS
Leader-9525-Manual-Page-1-Picture


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