Iwatsu SS-7804, SS-7805, SS-7810 Service Manual

Name: Iwatsu SS-7804
Brand: Iwatsu
SKU: 4665629
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4.5 (25)

Service Manual

Oscilloscope

SS-7810/05/04

0-1

Introduction

◇ Thank you very much for your purchase of Iwatsu electronic measuring instruments.

◇ Please adjust or calibrate your instrument after throughly reading this service manual

and understanding its contents. After reading this manual, please keep it for future

reference.

Cautions for safe use

Matters that must be observed for operation of this instrument and for prevention of injury to

humans and damage to property are described as “ warnings” and “ cautions” in this

service manual.

Explanation of “ Warnings” and “ Cautions” coulmns in this manual

Cautions

◇ Parts of the contents of this service manual may be modified without notice to

accommodate improvements in performance and function.

◇ Reproduction of the contents of this service manual without previous consent is

prohibited.

History

◇ Jan. 2004 : Issue of the 1st edition

KML045311 A1-523150(B)

Warning

Caution

Incorrect operation or failure to need warnings may result in death

or serious injury.

Incorrect operation or failure to need cautions may result in injury

or damage to equipment.

0-2

Warnings

Cautions

Use care when servicing with power on:

Dangerous voltages exist at several points in this product. To avoid personal injury, do not

touch exposed connections or components while power is on.

Disconnect power before removing protective panels, soldering, or replacing components.

●●

● Never place a heavy substance on the power cord:

It will cause an electric shock or fire.

●●

● Prior to connecting or disconnecting the power cord, set the power supply to STBY:

Its negligence will cause an electric shock or trouble.

●●

● Use the specified AC power to operate the instrument:

Use of non-specified power will cause an electric shock, fire, or trouble. The available AC

power supplies are as follows:

・ Supply voltage : 90 to 132V AC/180 to 250V AC

・ Frequency : 48 to 440Hz

・ Power consumption : Max. 110VA

●●

● Use a 3-core power cord suitable to the supply voltage:

Use of other cord will an electric shock or fire.

●●

● When replacing a fuse, be sure to use our specified one (

φφ

φ5

××

×20mm, 250VA, 2A, slow):

Use of other fuse will cause a fire or trouble.

●●

● Do not place any substance near the air vent of this instrument or fan:

It will cause a fire or trouble.

●●

● Use the instrument within the specified operating range:

Otherwise, it will cause a trouble. An available temperature range is as follows:

・ Temperature : 0 to 40℃

・ Relative humidity : 90% RH(40℃)

●●

● Do not apply an overvoltage to the input terminal:

It will cause a trouble. A maximum allowable input voltage is as follows:

・ CH1, CH2, CH3 (EXT):

Directly : Max. ±400V

・ When the SS-087R (10:1) or SS-088 (1:1, 10:1) probe is used:

At 10:1 : Max. ±600V

At 1:1 : Max. ±400V

[NOTE] The maximum input voltage decreases depending on frequency and high voltage pulse of the input signal.

0-3

Introduction .................................................................................................................................................... 0- 1

Caution for safe use ...................................................................................................................................... 0- 1

Warnings ....................................................................................................................................................... 0- 2

Cautions ........................................................................................................................................................ 0- 2

Section 1 Specifications ................................................................................................................................. 1- 1

Section 2 Check and Adjustment

2.1 Knowledge Required before Beginning Adjustment .............................................................................. 2- 1

2.1.1 Introduction .................................................................................................................................... 2- 1

2.1.2 Check and Adjustment Intervals ..................................................................................................... 2- 1

2.1.3 Menu Screen .................................................................................................................................. 2- 1

① Menu Tree SS-7810/05/04 ........................................................................................................ 2- 2

② Manual Adjustment Menu ..........................................................................................................2- 3

③ Menu Screen (f:MAN-ADJ, AUTO-ADJ, AUTO-CONF) ............................................................. 2- 4

④ Key Function/Movement in Adjustment Menu............................................................................ 2- 5

2.1.4 Check and Adjustment Method....................................................................................................... 2- 6

① Check/Adjustment Procedure Flow Chart SS-78** ....................................................................2- 6

② Automatic Adjustment Items ......................................................................................................2- 7

③ Automatic Comfirmetion Items .................................................................................................. 2-8

④ The Check/Adjustment Items and Sequence With Jig IE-1066 ................................................. 2- 9

⑤ The Check/Adjustment Items and Sequence Without Jig IE-1066 ............................................ 2- 10

2.1.5 Check and Adjustment Affected Item.............................................................................................. 2- 11

2.1.6 Test Equipment Required ............................................................................................................... 2- 12

2.1.7 Preparation for Check and Adjustment ........................................................................................... 2- 14

2.1.8 Connection the Adjustment Jig IE-1066 to the SS-78** .................................................................. 2-15

2.1.9 Check and Adjustment Locations ................................................................................................... 2- 16

① POWER BOARD ....................................................................................................................... 2- 16

② ANA BOARDⅠ......................................................................................................................... 2-17

③ ANA BOARDⅡ......................................................................................................................... 2-18

④ HV BOARD ............................................................................................................................... 2- 19

⑤ V MAIN BOARD Ⅰ(SS-7810) .................................................................................................. 2- 20

2.2 DC Power Supply .................................................................................................................................. 2- 21

2.3 CRT Display .......................................................................................................................................... 2- 22

2.3.1 CRT Cathode Voltage .....................................................................................................................2- 22

2.3.2 CRT Heater Voltage ....................................................................................................................... 2- 22

2.3.3 Focus ............................................................................................................................................. 2- 23

2.3.4 Intensity .......................................................................................................................................... 2- 23

2.3.5 Trace Rotation ................................................................................................................................ 2- 24

2.3.6 Orthogonality ..................................................................................................................................2-25

2.4 Check the Key Function in Automatic Confirmation Mode ..................................................................... 2- 26

2.5 Gain (Coarse) ....................................................................................................................................... 2- 27

2.5.1 Vertical Gain ................................................................................................................................... 2- 27

2.5.2 Horizontal Gain ............................................................................................................................... 2- 28

2.5.3 △V Readout Gain .......................................................................................................................... 2- 28

2.5.4 △t Readout Gain ............................................................................................................................ 2- 29

2.6 Crystal Oscillation Frequency ................................................................................................................ 2- 29

2.7 Balance Coarse .................................................................................................................................... 2- 30

2.7.1 Balance Coarse (Automatic Adjustment Menu "D, L") .................................................................... 2- 30

2.7.2 Magnification Gain .......................................................................................................................... 2- 31

0-4

2.8 Vertical Deflection System .................................................................................................................... 2- 32

2.8.1 Flatness CHI/CH2/CH3 (SS-7810) ................................................................................................. 2- 32

2.8.2 Attenuator Compensation CH1/CH2 ............................................................................................... 2- 33

2.8.3 Attenuator Compensation CH3 (SS-7810)......................................................................................2-34

2.8.4 High-frequency Compensation CH1/CH2 .......................................................................................2-34

2.8.5 High-frequency Compensation CH3 (SS-7810) ..............................................................................2-35

2.8.6 Bandwidth ....................................................................................................................................... 2- 36

2.9 Horizontal Deflection System ................................................................................................................ 2- 37

2.9.1 High-speed Sweep Rate ................................................................................................................. 2- 37

2.9.2 Sweep Linearity at High-speed Sweep Rate (SS-7810) .................................................................. 2- 38

2.10 Calibrator Output ................................................................................................................................... 2- 39

2.11 Automatic Adjustment ........................................................................................................................... 2- 40

2.11.1 Automatic Adjustment Item ............................................................................................................. 2- 42

2.11.2 Error Message ................................................................................................................................ 2- 43

2.12 Automatic Confirmation ......................................................................................................................... 2- 50

2.12.1 Automatic Confirmation Items ........................................................................................................ 2- 51

2.13 Manual Adjustment Menu ..................................................................................................................... 2- 52

2.13.1 Manual Adjustment Items ............................................................................................................... 2- 53

2.13.2 Vertical Gain ...................................................................................................................................2-55

2.13.3 Trigger ............................................................................................................................................ 2- 56

2.13.4 X-Y Gain and Position .................................................................................................................... 2- 57

2.13.5 Manual Adjustment Procedure ....................................................................................................... 2- 58

2.14 Adjustment Jig IE-1066 .........................................................................................................................2- 72

2.14.1 Specifications .................................................................................................................................2-72

2.14.2 Preparation.....................................................................................................................................2-72

2.14.3 Adjustment of IE-1066.................................................................................................................... 2- 73

2.14.4 Schematic Diagram ........................................................................................................................ 2- 75

Section 3 Block Diagram

SS-7810 Block Diagram ........................................................................................................................ 3- 1

SS-7805/04 Block Diagram ................................................................................................................... 3- 7

Section 4 Electrical Parts List

SS-7810 Parts List

CH1 ATTENUATOR 1 ........................................................................................................................ 4- 10

CH2 ATTENUATOR 2 ........................................................................................................................ 4- 12

CH3 ATTENUATOR 3 ........................................................................................................................ 4- 14

CH1 1ST PREAMP 4 ......................................................................................................................... 4- 15

CH2 1ST PREAMP 5 ......................................................................................................................... 4- 17

CH1 2ND PREAMP 6 ......................................................................................................................... 4- 18

CH2 2ND PREAMP 7 ......................................................................................................................... 4- 19

CH3 PREAMP 8 ................................................................................................................................. 4- 20

CH SW & DRY LINE DRIV 9.............................................................................................................. 4- 22

V CHARA AMP 10 .............................................................................................................................. 4- 23

V MAIN AMP 11 ................................................................................................................................. 4- 24

V OUTPUT AMP 12 ........................................................................................................................... 4- 25

CH1 TRIG PREAMP 13 ..................................................................................................................... 4- 26

CH2 TRIG PREAMP 14 ..................................................................................................................... 4- 28

CH3 TRIG PREAMP 15 ..................................................................................................................... 4- 29

A/B TRIG SELECT 16 ........................................................................................................................ 4- 30

A TRIG AMP 17 .................................................................................................................................. 4- 31

B TRIG AMP 18 ................................................................................................................................. 4- 32

TV SYNC SEP 19 .............................................................................................................................. 4- 33

0-5

TLC CIRCUIT 20................................................................................................................................ 4- 34

A SAWTOOTH BUFF 21....................................................................................................................4-35

B SAWTOOTH BUFF 22 ................................................................................................................... 4- 36

A TIMING 23 ...................................................................................................................................... 4- 37

B TIMING 24 ...................................................................................................................................... 4- 38

H & Z SW 25 ...................................................................................................................................... 4- 39

H MAIN AMP 26 .................................................................................................................................4-41

H OUTPUT AMP 27 ........................................................................................................................... 4- 42

Z AMP 28 ........................................................................................................................................... 4- 43

PROBE SENCE 29 ............................................................................................................................ 4- 44

ANA BOARD CONTROL 30 ............................................................................................................... 4- 45

ANA BOARD 8 BIT D/A 31 .................................................................................................................4-45

CRT CONT BOARD 32 ...................................................................................................................... 4- 46

H.V. CIRCUIT 33 ................................................................................................................................ 4- 47

CPU BOARD 35 ................................................................................................................................. 4- 49

36 (missing number)

PANEL BOARD 37 ............................................................................................................................. 4- 51

KEY BOARD 38 ................................................................................................................................. 4- 51

POWER 39 ........................................................................................................................................4-52

OVER ALL 40 ..................................................................................................................................... 4- 54

SS-7805/04 Parts List

CH1 ATTENUATOR 1 ........................................................................................................................4-56

CH2 ATTENUATOR 2 ........................................................................................................................4-58

EXT TRIG IN 3 ................................................................................................................................... 4- 60

CH1 1st PREAMP 4 ...........................................................................................................................4-61

CH2 1st PREAMP 5 ...........................................................................................................................4-63

CH1 2nd PREAMP 6 .......................................................................................................................... 4- 65

CH2 2nd PREAMP 7 .......................................................................................................................... 4- 66

CH SW & DRY LINE DRIV 9.............................................................................................................. 4- 67

V CHARA AMP 10 .............................................................................................................................. 4- 68

V MAIN AMP 11 ................................................................................................................................. 4- 69

V OUTPUT AMP 12 ........................................................................................................................... 4- 71

CH1 TRIG PREAMP 13 ..................................................................................................................... 4- 72

CH2 TRIG PREAMP 14 ..................................................................................................................... 4- 73

A TRIG SELECT 16 ........................................................................................................................... 4- 74

A TRIG AMP 17 .................................................................................................................................. 4- 75

TV SYNC SEP 19 .............................................................................................................................. 4- 77

TLC CIRCUIT 20................................................................................................................................ 4- 78

A SAWTOOTH BUFF 21....................................................................................................................4-79

A TIMING 23 ...................................................................................................................................... 4- 80

H & Z SW 25 ...................................................................................................................................... 4- 81

H MAIN AMP 26 .................................................................................................................................4-83

H OUTPUT AMP 27 ........................................................................................................................... 4- 85

Z AMP 28 ........................................................................................................................................... 4- 87

PROBE SENCE 29 ............................................................................................................................ 4- 89

ANA BOARD CONTROL 30 ............................................................................................................... 4- 89

ANA BOARD 8 bit D/A 31 ................................................................................................................... 4- 89

CPU BOARD 35 ................................................................................................................................. 4- 89

PANEL BOARD 37 ............................................................................................................................. 4- 90

V MAIN BOARD .................................................................................................................................... 4- 90

CRT CONT BOARD 32 ...................................................................................................................... 4- 91

H.V. CIRCUIT 33 ................................................................................................................................ 4- 92

CPU BOARD 35 ................................................................................................................................. 4- 94

0-6

KEY BOARD 38 ................................................................................................................................. 4- 96

SS-78LVPS(100M) POWER 39 ......................................................................................................... 4- 97

OVER ALL 40 ..................................................................................................................................... 4-100

Selection 5 Schematic Diagrams

SS-7810

CH1/CH2 ATTENUATOR 1 2 .......................................................................................................... 5- 1

CH3 ATTENUATOR 3 ........................................................................................................................ 5- 2

CH1/CH2 1st PREAMP 4 5 .............................................................................................................5- 3

CH1 2nd PREAMP 6 .......................................................................................................................... 5- 4

CH2 2nd PREAMP 7 .......................................................................................................................... 5- 5

CH3 PREAMP 8 ................................................................................................................................. 5- 6

CH SW & DRY LINE DRIV 9.............................................................................................................. 5- 7

V CHARA AMP 10 .............................................................................................................................. 5- 8

V MAIN AMP 11 ................................................................................................................................. 5- 9

V OUTPUT AMP 12 ........................................................................................................................... 5- 10

CH1 TRIG PREAMP 13 ..................................................................................................................... 5- 11

CH2/3 TRIG PREAMP 14 15 .......................................................................................................... 5- 12

A/B TRIG SELECT 16 ........................................................................................................................ 5- 13

A/B TRIG AMP 17 18 ...................................................................................................................... 5- 14

TV SYNC SEP 19 .............................................................................................................................. 5- 15

TLC CIRCUIT 20................................................................................................................................ 5- 16

A/B SAWTOOTH BUFF 21 22 ........................................................................................................ 5- 17

A/B TIMING 23 24 ........................................................................................................................... 5- 18

H & Z SW 25 ...................................................................................................................................... 5- 19

H MAIN AMP 26 .................................................................................................................................5-20

H OUTPUT AMP 27 ........................................................................................................................... 5- 21

Z AMP 28 ........................................................................................................................................... 5- 22

PROBE SENCE 29 ............................................................................................................................ 5- 23

ANA BOARD CONTROL 30 ............................................................................................................... 5- 24

ANA BOARD 8 BIT D/A 31 .................................................................................................................5-25

CRT CONT BOARD 32 ...................................................................................................................... 5- 26

H.V. CIRCUIT 33 ................................................................................................................................ 5- 27

CPU BOARD 35 ................................................................................................................................. 5- 29

PANEL BOARD 37 ............................................................................................................................. 5- 33

KEY BOARD 38 ................................................................................................................................. 5- 34

POWER 39 ........................................................................................................................................5-35

OVER ALL 40 ..................................................................................................................................... 5- 36

SS-7805/04

CH1/CH2 ATTENUATOR 1 2 .......................................................................................................... 5- 38

EXT TRIG IN 3 ................................................................................................................................... 5- 39

CH1/2 1st PREAMP 4 5 .................................................................................................................. 5- 40

CH1 2nd PREAMP 6 .......................................................................................................................... 5- 41

CH2 2nd PREAMP 7 .......................................................................................................................... 5- 42

CH SW & DRY LINE DRIV 9.............................................................................................................. 5- 43

V CHARA AMP 10 .............................................................................................................................. 5- 44

V MAIN AMP 11 ................................................................................................................................. 5- 45

V OUTPUT AMP 12 ........................................................................................................................... 5- 46

CH1 TRIG PREAMP 13 ..................................................................................................................... 5- 47

CH2 TRIG PREAMP 14 ..................................................................................................................... 5- 48

A TRIG SELECT 16 ........................................................................................................................... 5- 49

A TRIG AMP 17 .................................................................................................................................. 5- 50

TV SYNC SEP 19 .............................................................................................................................. 5- 51

0-7

TLC CIRCUIT 20................................................................................................................................ 5- 52

A SAWTOOTH BUFF 21....................................................................................................................5-53

A TIMING 23 ...................................................................................................................................... 5- 54

H & Z SW 25 ...................................................................................................................................... 5- 55

H MAIN AMP 26 .................................................................................................................................5-56

H OUTPUT AMP 27 ........................................................................................................................... 5- 57

Z AMP 28 ........................................................................................................................................... 5- 58

PROBE SENCE 29 ............................................................................................................................ 5- 59

ANA BOARD CONTROL 30 ............................................................................................................... 5- 60

ANA BOARD 8 BIT D/A 31 .................................................................................................................5-61

CRT CONT BOARD 32 ...................................................................................................................... 5- 62

H.V. CIRCUIT 33 ................................................................................................................................ 5- 63

CPU BOARD 35 ................................................................................................................................. 5- 64

PANEL BOARD 37 ............................................................................................................................. 5- 68

KEY BOARD 38 ................................................................................................................................. 5- 69

POWER BOARD 39 .......................................................................................................................... 5- 70

OVER ALL 40 ..................................................................................................................................... 5- 71

Selection 6 Mechanical Parts Lists and Illstration ..........................................................................................6- 1

Section 1 Specifications

Section 2 Check and Adjustment

Section 3 Block Diagram

Section 4 Electrical Parts List

Section 5 Schematic Diagrams

Section 6 Mechanical Parts List

and Illustration

Section 1 Specifications

1-1

SS-7810

CRT

Type 6 inch, diagonal rectangular flat face, intemal graticule, meshelss

CRT with graticule illumination

Display area 8 div × 10 div (1 div ＝10 mm)

Accelerating voltage Approx. 16 kV

Vertical defection system (Y axis)

Vertical mode CH1, CH2, CH3, ADD, ALT/CHOP

CH1, CH2 CHOP mode switching rate 555 kHz ± 1 %

Deflection factor

Range 2 mV/div to 5 Vdiv, 1-2-5 sequence, 11 steps

Variable control range 2 mV/div to 12.5 V/div continuously variable

Accuracy ± 2%

Frequency characteristics

Bandwidth

5 mV to 5 V/div DC to 100 MHz −3 dB

2 mV/div DC to 50 MHz −3 dB

Band width limiter DC to approx. 20 MHz

[Note] AC coupled low cutoff frequency (−3 dB) is 4 Hz.

Rise time Approx. 3.5 ns

[Note] Rise time Tr is calculate from:

350

Tr ＝ [ns]

Bandwidth [MHz]

Step response at 10 mV/div, with 50 Ω termination

Over shoot 3 %

Sag (at 1 KHz) 1 %

Signal delay At least 30 ns of the sweep is displayed before the triggering event.

Input coupling AC, DC, GND

Input RC 1 M Ω±1.5 % // 20pF ± 2pF

Maximum input voltage ± 400 V MAX

Position control range Approx. ±10 div from the center line of the screen

Invert Available on CH2

ADD

Accuracy of sum (at 1 kHz) ± 3%

Frequency characteristics DC to 60 MHz −3 dB

Common-mode rejection ratio at 10 mV/div

1 kHz sin wave 50:1

20 MHz sine wave 15:1

Dynamic range Overranging the screen at 100 MHz in the case of 10 mV/div

Probe sense 10:1, 100:1 detection

1-2

CH3

Deflection factor

Range 50 mV/div, 100 mV/div, 500 mV/div

Accuracy ± 2 %

Bandwidth DC to 100 MHz −3 dB

Rise time Approx. 3.5 ns

[Note] Rise time Tr is calculate from:

350

Tr ＝ [ns]

Bandwidth [MHz]

Step response at 50 mV/div, with 50Ω termination

Over shoot 6 %

Sag (at 1 KHz) 1 % [Note] AC coupled low cutoff frequency (−3 dB) is 10 Hz

Imput coupling AC, DC

Input RC 1 M Ω±1.5 % // 20 pF ±3pF

Maximum input voltage ±400 V MAX

Position control range Approx. ± 10 div from the center line of the screen

Dynamic range Overranging the screen at 100 MHz

Probe sense 10:1, 100:1 detection

Triggering

A triggering

Trigger sensitivity Frequency P.P signal amplitude

DC to 10 MHz 0.4 div

10 MHz to 100 MHz 1.0 div

[Note] TV : The ratio between the composite video signal and

synchronization signal is 7:3 and synchronization signal

amplitude is 1.5 div or more.

HF-REJ : Attenuates at 10 kHz or more

LF:REJ : Attenuates at 10 kHz or less

Trigger level range ±9.5 div or more (set range: ±10 div)

Signal source CH1, CH2, CH3, LINE, VERT

Coupling AC, DC, HF-REJ, LF-REJ

Slope ＋, −

B triggering

Trigger sensitivity Frequency P.P signal amplitude

DC to 10 MHz 0.4 div

10 MHz to 100 MHz 1.0 div

[Note] HF-REJ : Attenuates at 10 kHz or more

LF-REJ : Attenuates at 10 kHz or less

Trigger level range ± 9.5 div or more (set range: ±10 div)

Signal souroe CH1, CH2, CH3

Coupling AC, DC, HF-REJ, LF-REJ

Slope ＋, −

TV mode NTSC, PAL, (SECAM)

TV synchronization ODD, EVEN, BOTH TV-H

[Note] ODD/EVN, or BOTH can be seiected

NTSC: 5 H to 2000 H

PAL (SECAM), HDTV: 2 H to 1997 H

1-3

AUTO SETUP

Channels Avallable CH1 and CH2

Frequency 50 Hz to 50 MHz

Horizontal deflection system (X axis)

Horizontal display A, ALT, B, X-Y

A sweep

Sweep mode AUTO, NORMAL SINGLE

Sweep rates

Maximum sweep 2 ns/div

Range 20 ns to 500 ms/div 1-2-5 sequence, 23 steps

Variable range 20 ns to 1.5 s/div

Accuracy Ⅰ± 2 % over center 8 div

Accuracy Ⅱ± 5 % over center any 2 div within center 8 div

Hold-off time Countinuously variable

B sweep

Delay Triggered delay or continuous delay (RUNS AFTER)

Sweep rates

Maximum sweep 2 ns/div

Range 20 ns to 5 ms/div 1-2-5 sequence, 17 steps

Accuracy Ⅰ± 2 % over center 8 div

Accuracy Ⅱ± 5 % over center any 2 div within center 8 div

Delay time

Position control range 0.2 to 10.2 div

Accuracy ± [(set value × 0.005)＋(sweep rate × 0.1)]−55 ns with in range

of 1 μs/div to 500 ms/div

Delay pick off jitter 1/2000, at 1 ms/div of A sweep:, at 500 ns/div of B sweep

Sweep magnification

Magnifying ratio 10 times

Accuracy Ⅰ over center 8 div

20 ns/div, 50 ns/div ± 5 %

100 ns/div to 500 ms/div ± 3 %

Accuracy Ⅱ Over any 2 div within center 8 div

20 ns/div, 50 ns/div ± 8 %

100 ns/div to 500 ms/div ± 5 %

30 ns or 1 div at the beginning of sweep and 30 ns at the end of sweep are excluded.

X-Y operation

X axis (CH1)

Deflection factor Same as CH1

Accuracy ± 4 %

Bandwidth DC to 2 MHz, −3 db

Y axis CH1, CH2, CH3, ADD

Phase difference between × axis and Y axis

3' or less (DC to 200 kHz)

CAL (Probe calibration signal)

Waveform Rectangular wave

Fraquency 1 kHz ± 0.1 %

Duty ratio 49 % to 51 %

Output voltage 0.6 V ± 1%

1-4

Measurement with cursors and counter

Measurement with cursors

Type of measurement Time difference ( △ t), Voltage difference ( △ V)

Cursor position control range

X axis ± (5 ± 0.2) div from the center line of the screen

Y axis ± (4 ± 0.2) div from the center line of the screen

Accuracy

Voltage difference ( △ V) ± [(2 % of reading) ＋ (0.3 % of full scale)]

Time difference ( △ t)

MAG OFF ± [(2 % of reading) ± (0.3 % of full scale)]

MAG ON (MAG × 10)

500 ms to 100 ns/div ± [(3 % of reading) ＋ (0.3 % of full scale)]

50 ns, 20 ns/div ± [(5 % of reading) ＋ (0.3 % of full scale)]

Counter

Number of digits displayed 5 digits

Accuracy ± 0.01 %

Frequency measurement range 2 Hz to 100 MHz

Saving data Backup by built-in battery

Type of date to be saved Panel setup conditions immediately before turning power off *

Storing of panel setup conditions *

(SS-7821/11)

The state where the power cord is disconnected.

The maximum number of date items that can be stored: 32

Data retention time Approx. 30000H (at approx. 25 ℃)

Power source

Voltage range 90 to 132 VAC / 180 to 250 VAC

Frequency range 48 to 440 Hz

Power consumption 110 VA MAX

Mass and Dimension

Mass Approx. 7.5 kg (without accessories)

Dimension Approx. 272W × 152 H × 390 L [mm]

[Note] Without accessories, and projections.

Environmental condtions

Specification assurance temperature 10 to 35 ℃

Operating

Temperature 0 to 40 ℃

Humidity 90 % RH or less (at 40 ℃)

Storage

Temperature −20 to 70 ℃

Humidlty 80 % RH or less (at 70 ℃)

Altitude

Operating 5000 m, atmospheric pressure: Approx. 55 kPa

Nunoperating 15000 m, atmospheric pressure: Approx. 12 kPa

Vibration 15 minutes along each of three axes at a total displacement of 0.67

mmp. p with frequency Varied from 10 Hz to 55 Hz in 1 minute sweep.

1-5

Shock Lifting a side to a height of 10 cm and dropping it naturally onto hard

wood: 4 times on each side.

Dropping packaged Dropping an instrument packaged for transportation from a height of

90 cm.

Warm up time The specifications for this instrument are the assured values after

more than 30 min of power on.

1-6

SS-7805/04

CRT

Type 6 inch, diagonal rectangular flat face, internal graticule, meshelss

CRT with graticule illumination

Display area 8 div × 10 div (1 div ＝10 mm)

Accelerating voltage Approx. 16 kV

Vertical deflection system (Y axis)

Vertical mode CH1, CH2, ADD, ALT/CHOP

CH1, CH2 CHOP mode switching rate 555 kHz ± 1 %

Deflection factor

Range 2 mV/div to 5 V/div, 1-2-5 sequence, 11 steps

Variable control range 2 mV/div to 12.5 V/div continuously variable

Accuracy ± 2%

Frequency characteristics

Bandwidth

5 mV to 5 V/div DC to 40 MHz −3 dB (SS-7804) / DC to 50 MHz −3 dB (SS-7805)

2 mV/div DC to 20 MHz −3 dB (SS-7804) / DC to 20 MHz −3 dB (SS-7805)

Rise time

SS-7804 Approx. 8.75 ns

SS-7805 Approx. 7.0 ns

[Note] Rise time Tr is calculate from:

350

Tr ＝ [ns]

Bandwidth [MHz]

Step response at 10 mV/div, 50 Ω termination

Over shoot 3 % (SS-7804) / 8 % (SS-7805)

Sag (at 1 kHz) 1 % (SS-7804) / 1 % (SS-7805)

Signal delay At least 30 ns of the sweep is displayed before the triggering event.

Input coupling AC, DC, GND

Input RC 1 M Ω±1.5 % // 25 pF ± 2 pF

Maximum input voltage ± 400 V (DC+ACpeak)

Position control range Approx. ±10 div from the center line of the screen

Invert Available on CH2

ADD

Accuracy of sum (at 1 kHz) ± 3%

Frequency characteristics DC to 20 MHz −3 dB

Common-mode rejection ratio

50:1 1 kHz sine wave

15:1 20 MHz sine wave

Dynamic range Overranging the screen at 40 MHz (SS-7804)

Overranging the screen at 50 MHz (SS-7805)

Probe sense

Attached probe No function.

Optional probe 10:1, 100:1 detection

1-7

Triggering

Trigger sensitivity

[Note] TV : The ratio between the composite video signal and

synchronization signal is 7:3 and synchronization signal

amplitude is 1.5 div or more.

HF-REJ : Attenuates at 10 kHz or more

LF-REJ : Attenuates at 10 kHz or less

Trigger level range ±9.5 div or more (set range: ±10 div)

Signal source CH1, CH2, EXT, LINE, VERT

Coupling AC, DC, HF-REJ, LF-REJ

Slope ＋, −

TV mode NTSC, PAL (SECAM)

TV synchronization ODD, EVEN, BOTH TV-H

[Note] ODD, EVEN, or BOTH can be selected

NTSC: 5 H to 2000 H

PAL (SECAM): 2 H to 1997 H

EXTTRIG

Input RC 1 MW ±2 % // 25 pF ±3 pF

Input coupling DC

Maximum input voltage ±400 V (DC+ACpeak)

Probe sence 10:1 and 100:1 detection with an optional probe (SS-78R)

Horizontal deflection system (X axis)

Horizontal display A, X-Y

Sweep mode AUTO, NORMAL SINGLE

Sweep rates

Maximum sweep 10 ns/div

Range 100 ns to 500 ms/div

Variable range 100 ns to 1.25 s/div

Accuracy Ⅰ± 2 % over center 8 div

Accuracy Ⅱ± 5 % over center any 2 div within center 8 div

Hold-off time Countinuously variable

Sweep magnification

Magnifying ratio 10 times

Accuracy Ⅰ over center 8 div

100 ns/div to 200 ns/div ± 5 %

500 ns/div to 500 ms/div ± 3 %

Accuracy Ⅱ Over any 2 div within center 8 div

100 ns/div to 200 ns/div ± 8 %

500 ns/div to 500 ms/div ± 5 %

Frequency CH1, CH2 EXT

DC to 5 MHz 0.4 div 80 mV

5 MHz to 40 MHz (SS-7804)

5 MHz to 50 MHz (SS-7805)

1.0 div 200 mV

1-8

X-Y operation

X axis (CH1)

Deflection factor Same as CH1

Accuracy ± 3 %

Bandwidth DC to 2 MHz −3 dB

Y axis CH1, CH2, ADD

Phase difference between × axis and Y axis

3°or less (DC to 50 kHz)

CAL (Probe calibration signal)

Waveform Rectangular wave

Fraquency 1 kHz ± 0.1 %

Duty ratio 49 to 51 %

Output voltage 0.6 V ± 1%

Measurement with cursors and counter

Measurement with cursors

Type of measurement Time difference ( △ t), Voltage difference ( △ V)

Cursor position control range

X axis ± (5 ± 0.2) div from the center line of the screen

Y axis ± (4 ± 0.2) div from the center line of the screen

Accuracy

Voltage difference ( △ V) ± [(2 % of reading) ＋ (0.3 % of full scale)]

Time difference ( △ t)

MAG OFF ± [(2 % of reading) ＋ (0.3 % of full scale)]

MAG ON (MAG × 10)

100 ns, 200 ns/div ± [(5 % of reading) ＋ (0.3 % of full scale)]

500 ns to 500 ms/div ± [(3 % of reading) ＋ (0.3 % of full scale)]

Counter

Number of digits displayed 5 digits

Accuracy ± 0.01 %

Frequency measurement range

SS-7804 2 Hz to 40 MHz

SS-7805 2 Hz to 50 MHz

Saving data Backup by built-in battery

Type of date to be saved Panel setup conditions immediately before turning power off *

The state where the power cord is disconnected.

Data retention time Approx. 30,000H (at approx. 25 ℃)

Power source

Voltage range 90 to 132 VAC / 180 to 250 VAC

Frequency range 48 to 440 Hz

Power consumption 110 VA MAX

Mass and Dimension

Mass Approx. 7.5 kg (without accessories)

Dimension Approx. 272W × 152 H × 390 L [mm]

[Note] Without accessories, and projections.

1-9

Environmental conditions

Specification assurance temperature 10 to 35 ℃

Operating

Temperature 0 to 40 ℃

Humidity 90 % RH or less (at 40 ℃)

Storage

Temperature ‑20 to 70 ℃

Humidity 80 % RH or less (at 70 ℃)

Altitude

Operating 5,000 m, atmospheric pressure : Approx. 55 kPa

Nunoperating 15,000 m, atmospheric pressure : Approx. 12 kPa

Vibration 15 minutes along each of three axes at a total displacement of 0.67

mmp. p with frequency Varied from 10 Hz to 55 Hz in 1 minute sweep.

Shock Lifting a side to a height of 10 cm and dropping it naturally onto hard

wood: 4 times on each side.

Dropping packaged Dropping an instrument packaged for transportation from a height of

90 cm.

Warm up time The specifications for this instrument are the assured values after

more than 30 min of power on.

1-10

SS-501 (CH2 OUT, Z AXIS IN)

Factory option for the SS-7800 series.

SS-501 : SS-7804/7805

CH2 OUT connector (rear panel)

Outputs a sample of the signal applied to the CH2 signal input.

Z AXIS IN connector (rear panel)

Input a signal for an intensity modulation on screen.

Specification

CH2 OUT

Deflection factor 45 mV ±20 % per one division screen amplitude (at 50 Ω load)

DC level ±100 mV (at 50 Ωload)

Output coupling DC

Bandwidth 20 MHz –3 dB (at 50 Ω load)

Output resistance 50 Ω±20 %

Z AXIS IN

Input voltage 0.5 Vp-p or more

Polarity Positive going signal decreases intensity and

negative going signal increases intensity

Input frequency DC to 5 MHz

Input resistance 4.5 k Ω±20 %

Maximum input voltage ±50 V (DC+ACpeak)

Section 2 Check and Adjustment