B+K precision 5105B Manuale utente

INSTRUCTION

MANUAL MODEL 5105B

150MHz (1GS/s) Analog/Digital Oscilloscope

TEST INSTRUMENT SAFETY

WARNING

Normal use of test equipment exposes you to a certain amount of danger from electrical shock because testing

must sometimes be performed where exposed high voltage is present.An electrical shock causing 10 milliamps of

current to pass through the heart will stop most human heartbeats.Voltage as low as 35 volts dc or ac rms should

be considered dangerous and hazardous since it can produce a lethal current under certain conditions. Higher volt-

ages are even more dangerous.Your normal work habits should include all accepted practices to prevent contact

with exposed high voltage, and to steer current away from your heart in case of accidental contact with a high volt-

age. Observe the following safety precautions:

1.There is little danger of electrical shock from the dc output of this power supply. However, there are several

other possible test conditions using this power supply that can create a high voltage shock hazard:

a. If the equipment under test is the "hot chassis" type, a serious shock hazard exists unless the equipment is

unplugged (just turning off the equipment does not remove the hazard), or an isolation transformer is used.

b. If the equipment under test is "powered up" (and that equipment uses high voltage in any of its circuits), the

power supply outputs may be floated to the potential at the point of connection. Remember that high voltage may

appear at unexpected points in defective equipment. Do not float the power supply output to more than 100 volts

peak with respect to chassis or earth ground.

c. If the equipment under test is "off" (and that equipment uses high voltage in any of its circuits under normal

operation), discharge high-voltage capacitors before making connections or tests. Some circuits retain high voltage

long after the equipment is turned off.

2. Use only a polarized 3-wire ac outlet.This assures that the power supply chassis, case, and ground terminal are

connected to a good earth ground and reduces danger from electrical shock.

3. Don’t expose high voltage needlessly. Remove housings and covers only when necessary.Turn off equipment

while making test connections in high-voltage circuits. Discharge high-voltage capacitors after removing power.

4. If possible, familiarize yourself with the equipment being tested and the location of its high voltage points.

However, remember that high voltage may appear at unexpected points in defective equipment.

5. Use an insulated floor material or a large, insulated floor mat to stand on, and an insulated work surface on

which to place equipment; and make certain such surfaces are not damp or wet.

6.When testing ac powered equipment, the ac line voltage is usually present on some power input circuits such as

the on-off switch, fuses, power transformer, etc. "any time" the equipment is connected to an ac outlet.

7. B+K Precision products are not authorized for use in any application involving direct contact between our prod-

uct and the human body, or for use as a critical component in a life support device or system. Here, "direct con-

tact" refers to any connection from or to our equipment via any cabling or switching means.A "critical component"

is any component of a life support device or system whose failure to perform can be reasonably expected to cause

failure of that device or system, or to affect its safety or effectiveness.

8. Never work alone. Someone should be nearby to render aid if necessary.Training in CPR (cardio-pulmonary

resuscitation) first aid is highly recommended.

Subject to change without notice

Contents

Specifications 5

Important hints 6

List of symbols used: 6

Positioning the instrument 6

Safety 6

Proper operation 6

CAT I 6

Environment of use. 6

Environmental conditions 7

Maintenance 7

Line voltage 7

Description of the controls 8

Basic signal measurement 10

Signals which can be measured 10

Amplitude of signals 10

Values of a sine wave signal 10

DC and ac components of an input signal 11

Timing relationships 11

Connection of signals 11

First time operation and initial adjustments 12

Trace rotation TR 12

Probe adjustment and use 12

1 kHz – adjustment 12

1 MHz adjustment 13

Operating modes of the vertical amplifier 13

XY operation 14

Phase measurements with Lissajous figures 14

Measurement of phase differences in dual

channel Yt mode 14

Measurement of amplitude modulation 15

Triggering and time base 15

Automatic peak triggering (MODE menu) 15

Normal trigger mode (See menu MODE) 16

Slope selection (Menu FILTER) 16

Trigger coupling (Menu: FILTER) 16

Video (tv triggering) 16

Frame sync pulse triggering 17

Line sync pulse triggering 17

LINE trigger 17

Alternate trigger 17

External triggering 17

Indication of triggered operation (TRIG’D LED) 17

Hold-off time adjustment 17

Time base B (2nd time base). Delaying,

Delayed Sweep. Analog mode. 18

Alternate sweep 18

AUTOSET 19

Component tester 19

CombiScope 21

DSO Operation 22

DSO operating modes 22

Memory resolution 22

Memory depth 23

Horizontal resolution with X magnifier 23

Maximum signal frequency in DSO mode 23

Display of aliases 23

Vertical amplifier operating modes 23

Data transfer 23

Interface, Remote control

Selection of Baud rate 24

Data transmission 24

Loading of new firmware 24

General information concerning MENU 25

Controls and Readout 26

150 MHz (1GS/s) Analog/Digital Oscilloscope 4

Warranty and repair

1 GS/s Real Time Sampling, 10 GS/s Random Sampling

Pre-/Pos -Trigger -100 % o +400 %

8-Bi Low Noise Flash A/D Conver ers

Time Base 50 s/cm – 5 ns/cm

1 MPts memory per channel allows zoom up to 40,000 1

Acquisi ion modes: Single Even , Refresh, Average, Envelope,

Roll, Peak-De ec

RS-232 In erface

Signal display: Y and XY;

In erpola ion: Sinx/x, Pulse, Do Join (linear)

High fidelity even in digital

mode: Low noise signals dis-

played without additional noise

Digital Mode: One complete

TV line and a ZOOM mag-

nified sector PAL Burst)

150MHz (1GS/s) Analog/Digital Oscilloscope

Technical descrip ion

Vertical Deflection

Channels:

Analog: 2

Digi al:2

Opera ing Modes:

Analog: CH 1 or CH 2 separate, DUAL CH 1 and

CH 2 alternate or chopped), Addition

Digi al: Analog Signal Channels: CH 1 or CH 2

separate, DUAL CH 1 and CH 2)

Y in XY-Mode: CH 1

Inver : CH 1, CH 2

Bandwid h (-3 dB): 2 x 0 - 150 MHz

Rise ime: ‹ 2.3 ns

Overshoo : max. 1 %

Deflec ion Coefficien (CH 1, 2):14 calibrated steps

1 mV – 2 mV/cm 10 MHz) ± 5 % 0 - 10 MHz -3 dB))

5 mV – 20 V/cm ± 3 % 1-2-5 sequence)

variable uncalibrated): › 2.5 :1 to › 50 V/cm

Inpu s CH 1, 2:

Impedance: 1 MΩ // 15 pF

Coupling: DC, AC, GND ground)

Max. Inpu Vol age: 400 V DC + peak AC)

Y Delay Line (analog): 70 ns

Measuring Circui s: Measuring Category

Digi

al mode only:

Selec . swi ching hresholds: TTL, CMOS, ECL

User definable hresholds: 3

wi hin he range -2 V to +3 V

Analog mode only:

Func ion (selec able): Extern Trigger, Z unblank)

Coupling: AC, DC

Max. inpu vol age: 100 V DC + peak AC

Triggering

Analog and Digi al Mode

Au oma ic (Peak o Peak):

Min. signal heigh : 5mm

Frequency range: 10 Hz - 250 MHz

Level con rol range: from Peak- to Peak+

Normal (wi hou peak):

Min. signal heigh : 5mm

Frequency range: 0 - 250 MHz

Level con rol range: –10 cm to +10 cm

Opera ing modes: Slope/Video/Logic

Slope: positive, negative, both

Sources: CH 1, CH 2, alt.1/2 ≥8 mm), Line, Ext.

Coupling: AC: 10 Hz-250 MHz)

DC: 0-250 MHz)

HF: 30 kHz–250 MHz)

LF: 0 -5 kHz)

Noise Rej. switchable

Video: pos./neg. Sync. Impulse

S andards: 525 Line/60 Hz Systems

625 Line/50 Hz Systems

Field: even/odd/both

Line: all/line number selectable

Source: CH 1, CH 2, Ext.

Indica or for rigger ac ion: LED

Ex ernal Trigger via:0.3Vpp, 150MHz)

Coupling: AC, DC

Max. inpu vol age: 100 V DC +peak AC

Digi al mode:

Logic: AND/OR, TRUE/FALSE

Source:CH1 or 2

S a e: X, H, L

Pre/Pos Trigger: -100 % to +400% related to complete memory

Analog mode

2nd Trigger

Min. signal heigh : 5mm

Frequency range: 0 - 250 MHz

Coupling: DC

Level con rol range: –10 cm to +10 cm

Horizontal Deflection

Analog mode

Opera ing modes: A, ALT alternating A/B), B

Time base A (Sequence): 0.5 s/cm - 50 ns/cm 1-2-5 sequence)

Time base B (Sequence): 20ms/cm – 50 ns/cm 1-2-5 sequence)

Accuracy A and B: ±3%

X-Mag. x10: to 5 ns/cm

Accuracy X x10: ±5%

Variable ime base A/B: cont. 1:2.5

Hold Off ime: var. 1:10 LED-Indication

Bandwid h X-Amplifier: 0 - 3 MHz -3 dB)

X-Y phase shif ‹ 3°: ‹ 220 kHz

Digi al mode

Time base range (sequence)

Refresh Mode: 20 ms/cm - 5 ns/cm 1-2-5 sequence)

wi h Peak De ec : 20ms/cm – 50 ns/cm 1-2-5 sequence)

Roll Mode: 50 s/cm – 50 ms/cm 1-2-5 sequence)

Accuracy ime base

Time base: 50 ppm

Display: ±1%

MEMORY ZOOM: max. 40,000:1

Bandwid h X-Amplifier: 0 - 150 MHz -3 dB)

X-Y phase shif ‹ 3°: ‹ 100 MHz

Digital Storage

Acquisi ion (real ime): Analog channels: 2 x 500 MSa/s,

1 GSa/s interleaved

Acquisi ion (random sampling): Analog channels:10 GSa/s

Bandwid h: 2 x 0 - 150 MHz random)

Memory: 1 M-Samples per channel

Opera ing modes: Refresh, Average, Envelope/

Roll: Free Run/Triggered, Peak-Detect

Resolu ion (ver ical): 8 Bit 25 Pts/cm)

Resolu ion (horizon al):

Y : 11 Bit 200 Pts/cm)

XY: 8 Bit 25 Pts /cm)

In erpola ion: Sinx/x, Dot Join linear), Pulse

Delay: 1 Million * 1/Sampling Rate to

4 Million * 1/Sampling Rate

Display refresh ra e: max.170/s at 1 MPts

Display: Yt, XY acquired points only), Interpolation,

Dot Join

Reference Memories: 9 with 2 kPts each for recorded signals)

Display: 2 signals of 9 free selectable)

Operation/Measuring/Interfaces

Opera ion: Menu multilingual), Autoset, help

functions multilingual)

Save/Recall (ins rumen parame er se ings): 9

Signal display: max. 4 signals or 4 traces

analog: CH 1, 2 Time Base A) in combination with

CH 1, 2 Time Base B)

digi al:CH 1, 2 ZOOM or Reference

or Mathematics)

Frequency coun er:

6 digi resolu ion: ›1 MHz – 250 MHz

5 digi resolu ion: 0.5 Hz – 1MHz

Accuracy: 50 ppm

Au o Measuremen s:

Analog mode: Frequency, Period, Vdc, Vpp, Vp+, Vp-

add. in digi al mode: Vrms/Vavg

Cursor Measuremen s:

Analog mode: ∆V, ∆t, 1/∆t f), V to GND, ratio X, ratio Y

add. in digi al mode: Pulse count, Vt to Trigger Peak to Peak,

Peak+, Peak-

Resolu ion Readou /Cursor: 1000 x 2000 Pts, Signals: 250 x 2000

In erfaces (plug-in):RS-232

Mathematic functions

Number of Formula Se s: 5 with 5 formulas each

Sources: CH 1, CH 2, Math 1-Math 5

Targe s: 5 math. memories, Math 1-5

Func ions: ADD, SUB, 1/X, ABS, MUL, DIV, SQ, POS,

NEG, INV

Display: max. 2 math. memories Math 1-5)

Display

CRT: D14-375GH

Display area (wi h gra icule): 8 cm x 10 cm

Accelera ion vol age: approx. 14 kV

General Information

Componen es er

Tes vol age: approx. 7 Vrms open circuit), approx. 50 Hz

Tes curren : max. 7 mArms short circuit)

Reference Po en ial : Ground safety earth)

Probe ADJ Ou pu : 1 kHz/1 MHz square wave signal 0.2 Vpp

tr ‹ 4 ns)

Trace ro a ion: electronic

Line vol age: 105 – 253 V, 50/60 Hz ± 10 %, CAT II

Power consump ion: 47 Watt at 230 V, 50 Hz

Pro ec ive sys em: Safety class I EN61010-1)

Weigh : 5.6 kg

Cabine (W x H x D): 285 x 125 x 380 mm

Ambien empera ure: 0° C ...+40° C

Accessories supplied Line cord, Operating manual, 4 Probes 10:1 with attenuation ID, Windows Software for control and data transfer

150 MHz (1GS/s) Analog Digital Oscilloscope 5105B

Specifications and information is subject to change with out notice. For the most current product information please visit www.bkprecision.com

6Subject to change without notice

prior to connecting any signals. It is prohibited to separate

the safety ground connection.

Most electron tubes generate X rays; the ion dose rate of this

instrument remains well below the 36 pA/kg permitted by law.

In case safe operation may not be guaranteed do not use the

instrument any more and lock it away in a secure place.

Safe operation may be endangered if any of the following

was noticed:

– in case of visible damage.

– in case loose parts were noticed

– if it does not function any more.

– after prolonged storage under unfavourable conditions

(e.g. like in the open or in moist atmosphere).

– after any improper transport (e.g. insufficient packing not

conforming to the minimum standards of post, rail or

transport firm)

Proper operation

Please note: This instrument is only destined for use by

personnel well instructed and familiar with the dangers of

electrical measurements.

For safety reasons the oscilloscope may only be operated from

mains outlets with safety ground connector. It is prohibited

to separate the safety ground connection. The plug must be

inserted prior to connecting any signals.

CAT I

This oscilloscope is destined for measurements in circuits not

connected to the mains or only indirectly. Direct

measurements, i.e. with a galvanic connection to circuits

corresponding to the categories II, III, or IV are prohibited!

The measuring circuits are considered not connected to the

mains if a suitable isolation transformer fulfilling safety class

II is used. Measurements on the mains are also possible if

suitable probes like current probes are used which fulfil the

safety class II. The measurement category of such probes must

be checked and observed.

Measurement categories

The measurement categories were derived corresponding to

the distance from the power station and the transients to be

expected hence. Transients are short, very fast voltage or cur-

rent excursions which may be periodic or not.

Measurement cat. IV:

Measurements close to the power station, e.g. on electricity

meters

Measurement cat. III:

Measurements in the interior of buildings (power distribution

installations, mains outlets, motors which are permanently

installed).

Measurement cat. II:

Measurements in circuits directly connected to the mains

(household appliances, power tools etc).

Environment of use.

The oscilloscope is destined for operation in industrial,

business, manufacturing, and living sites.

Important hints

Please check the instrument for mechanical damage or loose

parts immediately after unpacking. In case of damage we

advise to contact the sender. Do not operate.

List of symbols used:

Consult the manual High voltage

Important note Ground

Positioning the instrument

For selection of the optimum position in use the instrument

may be set up in three different positions (see pictures C,D,E).

The handle will remain locked in the carrying position if the

instrument is positioned on its rear feet.

Move the handle to the instrument top if the horizontal

operating position is preferred (See picture C). If a position

corresponding the picture D (10 degrees inclination) is desired

move the handle from the carrying position A towards the

bottom until it engages and locks. In order to reach a position

with still greater inclination (E shows 20 degrees) unlock the

handle by pulling and move it further into the next locking

position. For carrying the instrument in the horizontal position

the handle can be locked horizontally by moving it upwards as

shown in picture B. The instrument must be lifted while doing

this, otherwise the handle will unlock again.

Safety

The instrument fulfils the VDE 0411 part 1 regulations for

electrical measuring, control and laboratory instruments and was

manufactured and tested accordingly. It left the factory in perfect

safe condition. Hence it also corresponds to European Standard

EN 61010-1 resp. International Standard IEC 1010-1. In order to

maintain this condition and to ensure safe operation the user is

required to observe the warnings and other directions for use in

this manual. Housing, chassis as well as all measuring terminals

are connected to safety ground of the mains. All accessible metal

parts were tested against the mains with 2200 VDC. The instrument

conforms to safety class I.

The oscilloscope may only be operated from mains outlets

with a safety ground connector. The plug has to be installed

Important hints

STOP

Subject to change without notice

Type of fuse:

Size 5 x 20 mm; 250V~, C;

IEC 127, Bl. III; DIN 41 662

(or DIN 41 571, Bl. 3).

Cut off: slow blow (T) 0,8A.

Environmental conditions

Operating ambient temperature: 0 to + 40 degrees C. During

transport or storage the temperature may be –25 to +55

degrees C.

Please note that after exposure to such temperatures or in

case of condensation proper time must be allowed until the

instrument has reached the permissible range of 0 to + 40

degrees resp. until the condensation has evaporated before it

may be turned on! Ordinarily this will be the case after 2 hours.

The oscilloscope is destined for use in clean and dry

environments. Do not operate in dusty or chemically aggres-

sive atmosphere or if there is danger of explosion.

The operating position may be any, however, sufficient

ventilation must be ensured (convection cooling). Prolonged

operation requires the horizontal or inclined position.

STOP

Do not obstruct the ventilation holes!

Specifications are valid after a 20 minute warm-up period

between 15 and 30 degr. C. Specifications without tolerances

are average values.

Maintenance

It is necessary to check various important properties of the

oscilloscope regularly. Only this will ensure that all

measurements will be exact within the instrument’s

specifications.

Clean the outer shell using a dust brush in regular intervals.

Dirt can be removed from housing, handle, all metal and plastic

parts using a cloth moistened with water and 1 % detergent.

Greasy dirt may be removed with benzene (petroleum ether)

or alcohol, there after wipe the surfaces with a dry cloth. Plastic

parts should be treated with an antistatic solution destined

for such parts. No fluid may enter the instrument. Do not use

other cleansing agents as they may adversely affect the plastic

or lacquered surfaces.

Line voltage

The instrument has a wide range power supply from 105 to

253 V, 50 or 60 Hz ±10%. There is hence no line voltage selector.

The line fuse is accessible on the rear panel and part of the

line input connector. Prior to exchanging a fuse the line cord

must be pulled out. Exchange is only allowed if the fuse hol-

der is undamaged, it can be taken out using a screwdriver put

into the slot. The fuse can be pushed out of its holder and

exchanged.

The holder with the new fuse can then be pushed back in place

against the spring. It is prohibited to ”repair“ blown fuses or

to bridge the fuse. Any damages incurred by such measures

will void the warranty.

Important hints

8Subject to change without notice

Front Panel Elements – Brief Description

POWER (pushbutton switch) 26

Turns scope on and off.

INTENS (knob) 26

Intensity for trace- and readout brightness, focus and trace

rotation control.

FOCUS, TRACE, MENU (pushbutton switch) 26

Calls the Intensity Knob menu to be displayed and enables

the change of different settings by aid of the INTENS knob.

See item 2.

REM (pushbutton switch) 26

Switches the displayed menu, the remote mode (REM lit)

off.

ANALOG/DIGITAL (pushbutton switch) 27

Switches between analog (green) and digital mode (blue).

STOP / RUN (pushbutton switch) 27

RUN: Signal data acquisition enabled.

STOP: Signal data acquisition disabled. The result of the

last acquisition is displayed.

MATH (pushbutton switch) 27

Calls mathematical function menu if digital mode is

present.

ACQUIRE (pushbutton switch) 28

Calls the signal capture and display mode menu in digital

mode.

SAVE/RECALL (pushbutton switch) 29

Offers access to the reference signal (digital mode only)

and the instrument settings memory.

SETTINGS (pushbutton switch) 30

Opens menu for language and miscellaneous function; in

digital mode also signal display mode.

AUTOSET (pushbutton switch) 30

Enables appropriate, signal related, automatic instrument

settings.

HELP (pushbutton switch) 31

Switches help texts regarding controls and menus on and

off.

POSITION 1 (knob) 31

Controls position of actual present functions: Signal (cur-

rent, reference or mathematics), Cursor and ZOOM (digi-

tal).

POSITION 2 (knob) 31

Controls position of actual present functions: Signal (current,

reference or mathematics) Cursor and ZOOM (digital).

CH1/2-CURSOR-CH3/4-MA/REF-ZOOM (pushbutton) 32

Calls the menu and indicates the current function of PO-

SITION 1 and 2 controls.

VOLTS/DIV-SCALE-VAR (knob) 32

Channel 1 Y deflection coefficient, Y variabel and Y scaling

setting.

VOLTS/DIV-SCALE-VAR (knob) 32

Channel 2 Y deflection coefficient, Y variabel and Y scaling

setting.

AUTO / CURSOR MEASURE (pushbutton switch) 33

Calls menus and submenus for automatic and cursor

supported measurement.

LEVEL A/B (knob) 34

Trigger level control for time base A and B.

MODE (pushbutton switch) 34

Calls selectable trigger modes.

FILTER (pushbutton switch) 35

Calls selectable trigger filter (coupling) and trigger slope

menu.

SOURCE (pushbutton switch) 36

Calls trigger source menu.

TRIG’d (LED) 37

Lit on condition that time base is triggered.

NORM (LED) 37

Lit on condition that NORMAL or SINGLE triggering is

present.

HOLD OFF (LED) 37

Lit if a hold off time >0% is chosen in time base menu

(HOR pushbutton ).

X-POS / DELAY (pushbutton switch) 37

Calls and indicates the actual function of the HORIZON-

TAL knob , (X-POS = dark).

HORIZONTAL (knob) 38

Changes the X position resp. in digital mode the delay time

(Pre- resp. Post-Trigger).

TIME/DIV-SCALE-VAR (knob) 38

Time base A and B deflection coefficient, time base vari-

able and scaling control.

MAG x10 (pushbutton switch) 38

10 fold expansion in X direction in Yt mode, with simultaneous

change of the deflection coefficient display in the readout.

HOR / VAR (pushbutton switch) 38

Calls ZOOM function (digital) and analog time base A and

B, time base variable and hold off control.

CH1 / VAR (pushbutton switch) 40

Calls channel 1 menu with input coupling, inverting, probe

and Y variable control.

VERT/XY (pushbutton switch) 40

Calls vertical mode selection, addition, XY mode and

bandwidth limiter.

CH2 / VAR (pushbutton switch) 41

Calls channel 1 menu with input coupling, inverting, probe

and Y variable control.

CH1 (BNC-socket) 42

Channel 1 signal input and input for horizontal deflection

in XY mode.

The figures shows you the page of the complete discription

in the chapter CONTROLS AND READOUT ▼

Subject to change without notice

EXIT MENU

POSITION 1 POSITION 2 HORIZONTAL

CH 3 CH 4

MATH

SAVE/

RECALL AUTOSET

RUN ACQUIRE SETTINGS HELP

CH 1/2

VOLTS / DIV

SCALE ·VAR

VOLTS / DIV

SCALE ·VAR

TIME / DIV

SCALE ·VAR

AUTO/

CURSOR

MEASURE

20 V 1 mV 20 V 1 mV

X-POS

MODE

FILTER

SOURCE

TRIG ’d

NORM

HOLD OFF

INPUTS

1MΩII15pF

max

400 Vp

X-INP

LOGIC

INPUTS

1MΩII15pF

max

100 Vp

TRIG

EXT

INTENS

TRIGGER

LEVEL A/B

ANALOG

DIGITAL

MIXED SIGNAL

OSCILLOSCOPE

1 GSa

1 MB

150 MHz

CH 1

50s 5ns

Z-INP

CURSOR

DIGITAL

ANALOG

DELAY

CH 3/4

MA/REF

ZOOM

VERT/XY

CH 2 CH 3/4 HOR MAG

FOCUS

TRACE

REMOTE OFF

CAT I

STOP

REM

VAR

VAR VAR x10

POWER

1 2 3 45 6 7 8 9 10 11 12

3431 32 33

Front Panel Elements – Brief Description

PROBE / ADJ (socket) 43

Square wave signal output for frequency compensation of

x10 probes.

PROBE / COMPONENT (pushbutton switch) 43

Calls COMPONENT TESTER mode settings and frequency

selection of PROBE ADJ signal.

COMPONENT TESTER (2 sockets with 4 mm Ø) 43

Connectors for test leads of the Component Tester. Left

socket is galvanically connected with protective earth.

MEMORY

oom

COMPONENT

TESTER

PROBE

ADJ

POWER

AUXILIARY INPUT

TRIGGER

EXTERN

Z-INPUT

1MΩ II

15pF

max

100 Vp

CAT I

AUX

AUXILIARY INPUT, Ext Trigger &

Intensity Modulation or Z input

5105B

10 Subject to change without notice

Basic signal measurement

Signals which can be measured

The following description pertains as well to analog as to DSO

operation. The different specifications in both operating modes

should be kept in mind.

with a fundamental repetition frequency of at least 150 MHz.

The frequency response is 0 to 150 MHz (-3 dB). The vertical

amplifiers will not distort signals by overshoots, undershoots,

ringing etc.

Simple electrical signals like sine waves from line frequency

ripple to hf will be displayed without problems. However, when

measuring sine waves, the amplitudes will be displayed with

an error increasing with frequency. At 100 MHz the amplitude

error will be around –10 %. As the bandwidths of individual

instruments will show a certain spread (the 150 MHz are a

guaranteed minimum) the actual measurement error for sine

waves cannot be exactly determined.

Pulse signals contain harmonics of their fundamental

frequency which must be represented, so the maximum useful

repetition frequency of nonsinusoidal signals is much lower

than 150 MHz. The criterion is the relationship between the

rise times of the signal and the scope; the scope’s rise time

should be <1/3 of the signal’s rise time if a faithful reproduction

without too much rounding of the signal shape is to be

preserved.

The display of a mixture of signals is especially difficult if it

contains no single frequency with a higher amplitude than

those of the other ones as the scope’s trigger system normally

reacts to a certain amplitude. This is e.g. typical of burst

signals. Display of such signals may require using the HOLD-

OFF control.

Composite video signals may be displayed easily as the

instrument has a tv sync separator.

The maximum sweep speed of 5 ns/cm allows sufficient time

resolution, e.g. a 100 MHz sine wave will be displayed one

period per 2 cm.

The vertical amplifier inputs may be DC or AC coupled. Use

DC coupling only if necessary and preferably with a probe.

Low frequency signals when AC coupled will show tilt (AC low

frequency – 3 dB point is 1.6 Hz), so if possible use DC coupling.

Using a probe with 10:1 or higher attenuation will lower the

–3 dB point by the probe factor. If a probe cannot be used due

to the loss of sensitivity DC coupling the scope and an external

large capacitor may help which, of course, must have a

sufficient DC rating. Care must be taken, however, when

charging and discharging a large capacitor.

Dc coupling is preferable with all signals of varying duty cycle,

otherwise the display will move up and down depending on

the duty cycle. Of course, pure DC can only be measured with

DC coupling.

The readout will show which coupling was chosen: = stands

for DC, ~ stands for AC.

Amplitude of signals

In contrast to the general use of rms values in electrical

engineering oscilloscopes are calibrated in Vpp as that is what

is displayed.

Derive rms from Vpp: divide by 2.84. Derive Vpp from rms:

multiply by 2.84.

Values of a sine wave signal

Vrms = rms value

VPP = pp – value

Vmom = momentary value, depends on time vs. period.

The minimum signal for a one cm display is 1 mVpp ±5 %

provided 1 mV/cm was selected and the variable is in the

calibrated position.

The available sensitivities are given in mVPP or VPP. The cursors

allow to indicate the amplitudes of the signals immediately on

the readout as the attenuation of probes is automatically taken

into account. Even if the probe attenuation was selected

manually this will be overridden if the scope identifies a probe

with an identification contact as different. The readout will

always give the true amplitude.

It is important that the variable be in its calibrated position.

The sensitivity may be continuously decreased by using the

variable (see Controls and Readout). Each intermediate value

between the calibrated positions 1–2–5 may be selected.

Without using a probe thus a maximum of 400 VPP may be

displayed (20 V/div x 8 cm screen x 2.5 variable).

Amplitudes may be directly read off the screen by measuring

the height and multiplying by the V/div. setting.

STOP

Please note: Without a probe the maximum

permissible voltage at the inputs must not exceed

400 Vp irrespective of polarity.

In case of signals with a DC content the peak value DC + AC

peak must not exceed + or – 400 VP. Pure AC of up to 800 VPP is

permissible.

STOP

If probes are used their possibly higher ratings are

only usable if the scope is DC coupled.

In case of measuring DC with a probe while the scope input is

AC coupled the capacitor in the scope input will see the input

DC voltage as it is in series with the internal 1 M resistor.

This means that the maximum DC voltage (or DC + peak AC)

is that of the scope input, i.e. 400 VP! With signals which contain

DC and AC the DC content will stress the input capacitor while

the AC content will be divided depending on the AC impedance

Basic signal measurement

The oscilloscope 5105B can display all repetitive signals

Indice

Altri manuali B+K precision Apparecchiature di prova

B+K precision

B+K precision 2560B Series Manuale utente

B+K precision

B+K precision 2560 Series Manuale utente

B+K precision

B+K precision 2194 Manuale utente

B+K precision

B+K precision 4012A Manuale utente

B+K precision

B+K precision 575A Manuale utente

B+K precision

B+K precision 8600 Series Manuale utente

B+K precision

B+K precision 1045B Manuale utente

B+K precision

B+K precision 530 Manuale utente

B+K precision

B+K precision 2552 Manuale utente

B+K precision

B+K precision 570A Manuale utente

B+K precision

B+K precision 881 Manuale utente

B+K precision

B+K precision 2190B Manuale utente

B+K precision

B+K precision 2190E Manuale utente

B+K precision

B+K precision TL89S1 Manuale di istruzioni

B+K precision

B+K precision 4040A Manuale utente

B+K precision

B+K precision 2190D Manuale utente

B+K precision

B+K precision 1474 Manuale utente

B+K precision

B+K precision 2540C Series Manuale utente

B+K precision

B+K precision 8500B Series Manuale del proprietario

B+K precision

B+K precision BK8510B Manuale utente

B+K precision

B+K precision 2120C Manuale utente

B+K precision

B+K precision Sefram MW9092 Manuale utente

B+K precision

B+K precision 2522B Manuale utente

B+K precision

B+K precision 1856D Manuale utente

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