Hameg HM303-6 User Manual

Oscilloscope

HM303-6

Manual

English

Contents

Oscilloscope

HM 303-6

General information regarding the CE marking ........... 4

General Information ......................................................... 6

Symbols ........................................................................... 6

General Information ........................................................ 6

Use of tilt handle ............................................................. 6

Safety .............................................................................. 6

Intended purpose and operating conditions ................... 6

Warranty .......................................................................... 7

Maintenance .................................................................... 7

Protective Switch-Off ...................................................... 7

Power supply ................................................................... 7

Type of signal voltage ...................................................... 8

Amplitude Measurements .............................................. 8

Voltage values of a sine curve ........................................ 8

Total value of input voltage ............................................. 9

Time Measurements ....................................................... 9

Connection of Test Signal ............................................. 10

First Time Operation ...................................................... 11

Trace Rotation TR .......................................................... 11

Probe compensation and use ....................................... 11

Adjustment at 1kHz ....................................................... 11

Adjustment at 1MHz ..................................................... 12

Operating modes of

the vertical amplifiers .................................................... 12

X-Y Operation ................................................................ 13

Phase comparison with Lissajous figures .................... 13

Phase difference measurement.................................... 13

3

in DUAL mode ............................................................... 13

Phase difference measurement in DUAL mode ........... 14

Measurement of an amplitude modulation .................. 14

Triggering and time base .............................................. 14

Automatic Peak (value) - Triggering .............................. 15

Normal Triggering .......................................................... 15

Slope

Trigger coupling ............................................................. 15

Line triggering (~) .......................................................... 16

Alternate triggering ....................................................... 16

External triggering ......................................................... 16

Trigger indicator ............................................................ 16

Holdoff-time adjustment ............................................... 16

Component Tester .......................................................... 17

General .......................................................................... 17

Using the Component Tester ........................................ 17

Test Procedure .............................................................. 17

Test Pattern Displays .................................................... 17

Testing Resistors .......................................................... 17

Testing Capacitors and Inductors ................................. 17

Testing Semiconductors ............................................... 18

Testing Diodes .............................................................. 18

Testing Transistors ........................................................ 18

In-Circuit Tests .............................................................. 18

Front Panel Elements HM 303-6

(Brief Description - Front View)............................... 20

Short Instruction for HM303-6 ...................................... 22

...................................................................... 15

2

Subject to change without notice

KONFORMITÄTSERKLÄRUNG
DECLARATION OF CONFORMITY
DECLARATION DE CONFORMITE

Hersteller HAMEG Instruments GmbH
Manufacturer Industriestraße 6
Fabricant D-63533 Mainhausen

Die HAMEG GmbH bescheinigt die Konformität für das Produkt
The HAMEG GmbH herewith declares conformity of the product
HAMEG GmbH déclare la conformite du produit

Bezeichnung / Product name / Designation:

Oszilloskop/Oscilloscope/Oscilloscope

Typ / Type / Type: HM303-6

mit / with / avec: —

Optionen / Options / Options: —

mit den folgenden Bestimmungen / with applicable regulations / avec les directives
suivantes

EMV Richtlinie 89/336/EWG ergänzt durch 91/263/EWG, 92/31/EWG
EMC Directive 89/336/EEC amended by 91/263/EWG, 92/31/EEC
Directive EMC 89/336/CEE amendée par 91/263/EWG, 92/31/CEE

Niederspannungsrichtlinie 73/23/EWG ergänzt durch 93/68/EWG
Low-Voltage Equipment Directive 73/23/EEC amended by 93/68/EEC
Directive des equipements basse tension 73/23/CEE amendée par 93/68/CEE

General information regarding the CE marking

Angewendete harmonisierte Normen / Harmonized standards applied / Normes harmonisées
utilisées

Sicherheit / Safety / Sécurité

EN 61010-1: 1993 / IEC (CEI) 1010-1: 1990 A 1: 1992 / VDE 0411: 1994
EN 61010-1/A2: 1995 / IEC 1010-1/A2: 1995 / VDE 0411 Teil 1/A1: 1996-05
Überspannungskategorie / Overvoltage category / Catégorie de surtension: II
Verschmutzungsgrad / Degree of pollution / Degré de pollution: 2

Elektromagnetische Verträglichkeit / Electromagnetic compatibility /
Compatibilité électromagnétique

EN 61326-1/A1
Störaussendung / Radiation / Emission: Tabelle / table / tableau 4; Klasse / Class / Classe B.
Störfestigkeit / Immunity / Imunitee: Tabelle / table / tableau A1.

EN 61000-3-2/A14
Oberschwingungsströme / Harmonic current emissions / Émissions de courant harmoni­que: Klasse / Class / Classe D.

EN 61000-3-3
Spannungsschwankungen u. Flicker / Voltage fl uctuations and fl icker /
Fluctuations de tension et du fl icker.

Datum /Date /Date Unterschrift / Signature /Signatur

15.01.2001

E. Baumgartner
Technical Manager /Directeur Technique

General information regarding the CE marking

HAMEG instruments fulfi ll the regulations of the EMC directive. The conformity test made by HAMEG is based on the actual generic- and product stan­dards. In cases where different limit values are applicable, HAMEG applies the severer standard. For emission the limits for residential, commercial and
light industry are applied. Regarding the immunity (susceptibility) the limits for industrial environment have been used.

The measuring- and data lines of the instrument have much infl uence on emmission and immunity and therefore on meeting the acceptance limits. For
different applications the lines and/or cables used may be different. For measurement operation the following hints and conditions regarding emission
and immunity should be observed:

1. Data cables

For the connection between instruments resp. their interfaces and external devices, (computer, printer etc.) suffi ciently screened cables must be used.
Without a special instruction in the manual for a reduced cable length, the maximum cable length of a dataline must be less than 3 meters and not be
used outside buildings. If an interface has several connectors only one connector must have a connection to a cable.

Basically interconnections must have a double screening. For IEEE-bus purposes the double screened cables HZ72S and HZ72L from HAMEG are
suitable.

2. Signal cables

Basically test leads for signal interconnection between test point and instrument should be as short as possible. Without instruction in the manual for
a shorter length, signal lines must be less than 3 meters and not be used outside buildings.

Signal lines must screened (coaxial cable - RG58/U). A proper ground connection is required. In combination with signal generators double screened
cables (RG223/U, RG214/U) must be used.

3. Infl uence on measuring instruments.

Under the presence of strong high frequency electric or magnetic fi elds, even with careful setup of the measuring equipment an infl uence of such
signals is unavoidable.
This will not cause damage or put the instrument out of operation. Small deviations of the measuring value (reading) exceeding the instruments spe­cifi cations may result from such conditions in individual cases.

4. RF immunity of oscilloscopes.

4.1 Electromagnetic RF fi eld

The infl uence of electric and magnetic RF fi elds may become visible (e.g. RF superimposed), if the fi eld intensity is high. In most cases the coupling
into the oscilloscope takes place via the device under test, mains/line supply, test leads, control cables and/or radiation. The device under test as well
as the oscilloscope may be effected by such fi elds.

Although the interior of the oscilloscope is screened by the cabinet, direct radiation can occur via the CRT gap. As the bandwidth of each amplifi er stage
is higher than the total –3dB bandwidth of the oscilloscope, the infl uence RF fi elds of even higher frequencies may be noticeable.

4.2 Electrical fast transients / electrostatic discharge

Electrical fast transient signals (burst) may be coupled into the oscilloscope directly via the mains/line supply, or indirectly via test leads and/or control
cables. Due to the high trigger and input sensitivity of the oscilloscopes, such normally high signals may effect the trigger unit and/or may become
visible on the CRT, which is unavoidable. These effects can also be caused by direct or indirect electrostatic discharge.

HAMEG Instruments GmbH

Subject to change without notice

3

HM303-6

35 MHz Analog Oscilloscope
HM303-6

Maximum signal fidelity with minimum overshoot

2 Channels with deflection coefficients of 1mV – 20 V/cm,
Low Noise Amplifiers

Time Base 0.2 s – 100 ns/cm, with X Magnification to 10 ns/cm

Triggering from 0 to 50 MHz from 5 mm signal level
(100 MHz › 8 mm)

Analog mode provides unexcelled signal presentation at high
resolution and up to 500,000 signal displays/sec.

Yt, XY and component-test modes

Line triggered composite
video signal

No signal distortion
resulting from overshoot

Full screen display of
35 MHz sine wave signal

4

Subject to change without notice

35 MHz Analog Oscilloscope HM303-6

Valid at 23 °C after a 30 minute warm-up period

Vertical Deflection

Operating Modes: Channel I or II only

Channels I and II (alternate or chopped)
Sum or Difference of CH I and CH II

Invert: CH II
XY Mode: via CH I (X) and CH II (Y)
Bandwidth: 2 x 0 to 35 MHz (-3 dB)
Rise Time: ‹10ns
Overshoot: max. 1%
Deflection Coefficients: 1-2-5 Sequence

1 mV/div. – 2 mV/div.: ± 5 % (Bandwidth 0 – 10 MHz (-3dB))
5 mV/div. – 20 V/div.: ± 3 % (Bandwidth 0 – 35 MHz (-3dB))
Variable (uncalibrated): › 2.5 : 1 to › 50 V/div.

Input Impedance: 1 MΩ II 20 pF
Input Coupling: DC, AC, GND (ground)
Max. Input Voltage: 400 V (DC + peak AC)

Triggering

Automatic (Peak to Peak): 20 Hz – 50 MHz (≥ 5 mm)

50 MHz - 100 MHz (≥ 8 mm)

Normal with Level Control: 0 - 50 MHz (≥ 5 mm)

50 MHz – 100 MHz (≥ 8 mm)

Trigger Indicator: LED
Slope: positive or negative
Sources: Channel I or II, CH I / CH II alternate

(≥ 8mm), Line and External

Coupling: AC: 10 Hz – 100 MHz

DC: 0 – 100 MHz

LF: 0 – 1.5 kHz
Trigger Indicator: LED
External Trigger Signal: ≥ 0.3 V

pp

(30 Hz – 50 MHz)

Active TV sync. separator: pos. and neg.

Horizontal Deflection

Time Base: 0.2 s/div. – 0.1μs/div. (1-2-5 Sequence)

Accuracy: ±3%
Variabel (uncalibrated): › 2.5:1 to › 0.5 s/div.

X Magnification x 10: up to 10 ns/div.

Accuracy: ± 5 %
Hold-Off Time: variable to approx. 10 : 1
XY
Bandwidth X Amplifier: 0 – 2.5 MHz (-3 dB)
XY Phase shift ‹ 3°: ‹ 120 kHz

Component Tester

Test Voltage: approx. 7V

rms

(open circuit)

Test Current: max. 7 mA

rms

(short-circuit)

Test Frequency: approx. 50Hz
Test Connection: 2 banana jacks 4 mm Ø

One test circuit lead is grounded via protective earth (PE)

Miscellaneous

CRT: D14-363GY, 8 x 10 cm with internal graticule
Acceleration Voltage: approx. 2kV
Trace Rotation: adjustable on front panel
Calibrator Signal (Square Wave): 0.2 V ± 1 %, ≈ 1kHz/1 MHz (tr ‹ 4 ns)
Power Supply (Mains): 105 – 253 V, 50/60 Hz ±10 %, CAT II
Power Consumption: approx. 36 Watt at 230 V/50 Hz
Ambient temperature: 0° C...+ 40°C
Safety class: Safety class I (EN61010-1)
Weight: approx. 5.4kg
Dimensions (W x H x D): 285 x 125 x 380 mm

Accessories supplied: Line Cord, operator’s manual, 2 Probes 1:1 / 10:1 (HZ154)

HM303-6E/260107/ce · Subject to alterations · © HAMEG Instruments GmbH · ® Registered Trademark · DQS-certified in accordance with DIN EN ISO 9001:2000, Reg.-No.: DE-071040 QM

HAMEG Instruments GmbH · Industriestr. 6 · D-63533 Mainhausen · Tel [phone] · Fax [phone] · www.hameg.com · [e-mail]

www.hameg.com

Specifi cations

Subject to change without notice

5

General information

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.

B

C

B

T

A

List of symbols used

Consult the manual High voltage

Important note Ground

Positioning the instrument

As can be seen from the fi gures, the handle can be set into diffe­rent positions:
A = carrying
B = handle removal and horizontal carrying
C = horizontal operating
D and E = operating at different angles
F = handle removal
T = shipping (handle unlocked)

Attention!

When changing the handle position, the instru-

ment must be placed so that it can not fall (e.g.
placed on a table). Then the handle locking knobs
must be simultaneously pulled outwards and
rotated to the required position. Without pulling
the locking knobs they will latch in into the next
locking position.

C

D

F

E

D

E

A

PUOPFGkT

PUOPFGkT PUOPFGkT

PUOPFGkT

PUOGkT

PUOPFGkT

PUOPFGkT

HM507

PUOPFGkT

PUOPFGkT

PUOPFGkT PUOPFGkT PUOPFGkT PUOPFGkT

PUOPFGkT

PUOPFGkT PUOPFGkT

PUk PUk PUk PUk PUk PUk

PUkT

HGOPFFD

B

PUOPFGkT

PUOPFGkT

PUkT

PUkT

PUkT

INPUT CHI
OPK
HJ

PUkT

VBN

PUOPFGkT

HJKL

PUOPFGkT

PUkT

PUOPFGkT

HGOFFD

PUkT

PUkT

PUkT

INPUT CHI

INPUT CHI

HAMEG

OPK

OPK

HJ

HJ

VBN

VBN

PUOPFGkT

HJKL

HJKL

T

Handle mounting/dismounting

The handle can be removed by pulling it out further, depending on
the instrument model in position B or F.

Safety

The instrument fulfi ls 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
200 V

The oscilloscope may only be operated from mains outlets with a
safety ground connector. The plug has to be installed 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.

. The instrument conforms to safety class I.

DC

T

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. insuffi cient packing not

conforming to the minimum standards of post, rail or transport
company)

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.

6

Subject to change without notice

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 fulfi lling safety class II is used.
Measurements on the mains are also possible if suitable probes
like current probes are used which fulfi l 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 current excursions
which may be periodic or not.

burn in, a fi nal functional and quality test is performed to check
all operating modes and fulfi lment of specifi cations. The latter is
performed with test equipment traceable to national measurement
standards.

Statutory warranty regulations apply in the country where the
HAMEG product was purchased. In case of complaints please
contact the dealer who supplied your HAMEG product.

Maintenance

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 fl uid may
enter the instrument. Do not use other cleansing agents as they
may adversely affect the plastic or lacquered surfaces.

Measurement CAT IV:
Measurements close to the power station, e.g. on electricity
meters

Measurement CAT III:
M e a su r e me n t s in t h e in t e r io r o f b u il d i n g s ( p o w e r d i s t ri b ut i o n in s t a l ­lations, 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.

Environmental conditions

Operating ambient temperature: 0 to + 40 degrees C. During trans­port or storage the temperature may be –20 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 aggressive atmosphere or if there is danger
of explosion.

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 holder 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.

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.

The operating position may be any, however, suffi cient ventilation
must be ensured (convecti on cooling). P rolonged operation requires
the horizontal or inclined position.

Do not obstruct the ventilation holes!

Specifi cations are valid after a 20 minute warm-up period between
15 and 30 degr. C. Specifi cations without tolerances are average
values.

Warranty and repair

HAMEG instruments are subjected to a rigorous quality control.
Prior to shipment each instrument will be burnt in for 10 hours.
Intermittent operation will produce nearly all early failures. After

Subject to change without notice

7

Type of signal voltage

Type of signal voltage

With the HM303-6, most repetitive signals in the frequency
range up to at least 35MHz (-3dB) can be examined.

Sinewave signals of 50MHz are displayed with a height of
approx. 50% (-6dB). However when examining square or pulse
type waveforms, attention must be paid to the harmonic
content of such signals. The repetition frequency (fundamen­tal frequency) of the signal must therefore be significantly
smaller than the upper limit frequency of the vertical amplifier.
Displaying composite signals can be difficult, especially if they
contain no repetitive higher amplitude content which can be
used for triggering. This is the case with bursts, for instance. To
obtain a well-triggered display in this case, the assistance of the
variable holdoff and/or variable time control may be required.
Television video signals are relatively easy to trigger using the
built-in TV-Sync-Separator (TV). For optional operation as a
DC or AC voltage amplifier, the vertical amplifier input is
provided with a DC/AC switch. The DC position should only be
used with a series-connected attenuator probe or at very low
frequencies or if the measurement of the DC voltage content
of the signal is absolutely necessary.

When displaying very low frequency pulses, the flat tops may be
sloping with AC coupling of the vertical amplifier (AC limit
frequency approx. 1.6 Hz for 3dB). In this case, DC operation is
preferred, provided the signal voltage is not superimposed on a
too high DC level. Otherwise a capacitor of adequate capacitance
must be connected to the input of the vertical amplifier with DC
coupling. This capacitor must have a sufficiently high breakdown
voltage rating. DC coupling is also recommended for the display
of logic and pulse signals, especially if the pulse duty factor
changes constantly. Otherwise the display will move upwards or
downwards at each change. Pure direct voltages can only be
measured with DC-coupling.

The minimum signal voltage which must be applied to the Y
input for a trace of 1div. height is 1mVpp when the Y-MAG. x5
pushbutton is depressed, the VOLTS/DIV. switch is set to
5mV/div., and the vernier is set to CAL by turning the fine
adjustment knob of the VOLTS/DIV. switch fully clockwise.
However, smaller signals than this may also be displayed. The
deflection coefficients on the input attenuators are indicated
in mV/div. or V/div. (peak-to-peak value).

The magnitude of the applied voltage is ascertained by
multiplying the selected deflection coefficient by the vertical
display height in div.

If an attenuator probe x10 is used, a further multiplication by a
factor of 10 is required to ascertain the correct voltage value.

For exact amplitude measurements, the variable control on the
attenuator switch must be set to its calibrated detent CAL.
When turning the variable control ccw, the sensitivity will be
reduced by a factor of 2.5.

Therefore every intermediate value is possible within the 1-2­5 sequence.

With direct connection to the vertical input, signals up to
400Vpp may be displayed (attenuator set to 20V/div., variable
control to left stop).

With the designations

H = display height in div.,
U = signal voltage in Vpp at the vertical input,
D = deflection coefficient in V/div. at attenuator switch,

the required value can be calculated from the two given
quantities:

Amplitude Measurements

In general electrical engineering, alternating voltage data
normally refers to effective values (rms = root-mean-square
value). However, for signal magnitudes and voltage designations
in oscilloscope measurements, the peak-to-peak voltage (Vpp)
value is applied. The latter corresponds to the real potential
difference between the most positive and most negative
points of a signal waveform.

If a sinusoidal waveform, displayed on the oscilloscope screen,
is to be converted into an effective (rms) value, the resulting
peak-to-peak value must be divided by 2x√2 = 2.83. Conversely,
it should be observed that sinusoidal voltages indicated in Vrms
(Veff) have 2.83 times the potential difference in V
relationship between the different voltage magnitudes can be
seen from the following figure.

. The

pp

Voltage values of a sine curve

Vrms = effective value; Vp= simple peak or crest value;
Vpp = peak-to-peak value; Vmom = momentary value.

However, these three values are not freely selectable. They
have to be within the following limits (trigger threshold, accuracy
of reading):

H between 0.5 and 8div., if possible 3.2 to 8div.,
U between 0.5mVpp and 160Vpp,
D between 1mV/div. and 20V/div. in 1-2-5 sequence.

Examples:
Set deflection coefficient D = 50mV/div. 0.05V/div.,
observed display height H = 4.6div.,
required voltage U = 0.05·4.6 = 0.23Vpp.

Input voltage U = 5Vpp,
set deflection coefficient D = 1V/div.,
required display height H = 5:1 = 5div.

√

Signal voltage U = 230Vrms·2

2 = 651Vpp
(voltage > 160Vpp, with probe 10:1: U = 65.1Vpp),
desired display height H = min. 3.2div., max. 8div.,
max. deflection coefficient D = 65.1:3.2 = 20.3V/div.,
min. deflection coefficient D = 65.1:8 = 8.1V/div.,
adjusted deflection coefficient D = 10V/div.

The input voltage must not exceed 400V, independent
from the polarity. If an AC voltage which is superimposed on

a DC voltage is applied, the maximum peak value of both
voltages must not exceed + or –400V. So for AC voltages with
a mean value of zero volt the maximum peak to peak value
is 800Vpp. If attenuator probes with higher limits are used,
the probes limits are valid only if the oscilloscope is set to DC
input coupling.

8

Subject to change without notice