Service manual as a PDF-file here

Service manual as a PDF-file here

L o w D i s t o r t i o n G e n e r a t o r

H M 8 0 3 7 - 2


G e n e r a l i n f o r m a t i o n r e g a r d i n g t h e C E m a r k i n g




HAMEG Instruments GmbH

Industriestraße 6

D-63533 Mainhausen




Die HAMEG Instruments GmbH bescheinigt die Konformität für das Produkt

The HAMEG Instruments GmbH herewith declares conformity of the product

HAMEG Instruments GmbH déclare la conformite du produit

Bezeichnung / Product name / Designation:

Low Distrotion Generator

Générateur sinusoïdales à faible distorsion

Typ / Type / Type: 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

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


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.


15.01.2001 Unterschrift / Signature / Signatur


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.

HAMEG Instruments GmbH


Subject to change without notice

C o n t e n t

Declaration of Conformity

General information regarding the CE-marking

Function Generator


Specifi cations

Control elements 6

Adjustment 6

Calibration 7

Circuit and layout diagrams 8





Subject to change without notice


H M 8 0 3 7 - 2

5 0 k H z L o w - D i s t o r t i o n S i n e W a v e

G e n e r a t o r

H M 8 0 3 7

Mainframe HM8001-2

HZ33, HZ34

Test cable BNC/BNC

Frequency range 5 Hz to 50 kHz

A complete measurement system for AF measurement equipment in combination with the HM8027

3-digit digital frequency display

High amplitude stability

Distortion factor ‹ 0.01 % (20 Hz-10 kHz)

Output voltage 1.5 V


into 600 Ω

Mainframe HM8001-2 required for operation

Distortion Meter HM8027


Subject to change without notice

S p e c i f i c a t i o n s

50 kHz Low-Distortion Sine Wave Generator HM8037

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

Operating modes

Sine wave, continuous, amplitude-regulated

Frequency range:

5 Hz bis 50 kHz, 4 ranges variable control 10:1, overlapping ranges

Frequency drift

(Frequency control in center position)

15 min.

8 hrs.

15 min.

8 hrs.

0.08 %

0.6 %

0.08 %

0.5 %

(50 kHz range)

(50 kHz range)

(in all other ranges)

(in all other ranges)

Frequency display

3-digit, 7-segment LED display

Display accuracy: ±1 digit

Distortion factor

5 Hz - 20 Hz:

20 Hz -10 kHz:

1 kHz:

10 kHz - 20 kHz:

20 kHz - 50 kHz: max. 0.03 % max. 0.01 % typ. 0.005 % max. 0.03 % max. 0.05 %

Signal output (short-circuit proof)

Output voltage: 1.5 V into 600 Ω

Internal resistance:

Amplitude flatness:

Attenuation: approx. 600 Ω max. ±0.2dB (5 Hz to 50 kHz) min. 60 dB

2 fixed attenuators: each 20 dB ± 0.2 dB variable control:

Amplitude stability:

0 dB to 20 dB

0.12 % (4 hrs.)

Synchronous output (short-circuit proof)

Output voltage:

Internal resistance:

2 V pp

, sine wave ca. 1 kΩ


The outputs can be isolated from the case ground by pressing a key.

Power supply (from mainframe):

+5 V/120 mA

+15 V/30 mA

Operating temperature:

Max. relative humidity:

–15 V/30 mA

(∑ = 6.3 W)

+10° C to +40° C

80 % (without condensation)

Dimensions (W x H x D) (without 22-pole flat plug):

135 x 68 x 228 mm

Weight: approx. 0.65 kg

Accessories supplied: Operator’s Manual

Optional accessories: HZ33/34 BNC Test Cable; HZ22 50

Ω feed-through termination; HZ10 Silicone test leads

HAMEG Instruments GmbH · Industriestr. 6 · D-63533 Mainhausen · Tel +49 (0) 6182 800 0 · Fax +49 (0) 6182 800 100 · · info

A Rohde & Schwarz Company

Subject to change without notice


C o n t r o l s e l e m e n t s

Control elements


DISPLAY (7-segment LED + LED)

3-digit frequency meter. Accuracy ±1 digit. LED indicators for Hz and kHz.

FREQUENCY (4-position rotary switch)

Frequency coarse adjustment from 5 Hz to 50 kHz in 4 decade steps.

VARIABLE (adjusting knob)

Continous frequency adjustment.

Overlapping the ranges selected with . Setting range is from x0,1 to x1 of selected range.

–20 dB Attenuators (pushbuttons)

Two tely. When all buttons are pressed, a total attenuation of

–40 dB is obtained. Including the amplitude control , the max. attenu ation amounts to –60 dB (factor: 1000).

GROUND (pushbutton)

When pressing, signal ground and chassis (earth) are not connected toget her; when released, signal ground and chassis are connected with each other.



Short-circuit-proof trigger signal output of same phase and amplitude as . Output amplitude is 2 V pp

open circuit.

Output impedance is 1 k .

600 OUTPUT (BNC connector)

Short-circuit-proof signal output of generator. Output impedance 600 .

AMPLITUDE (adjusting knob)

Continous adjustment of output amplitude from 0dB to

–20 dB when output is terminated with 600 .


(CONTROL LOOP ERROR VOLTAGE) a) Connect a DC multimeter (10V range) or an oscilloscope between REG and GND (CN6 connector).

b) Switch to 50 kHz frequency range.

Adjust the frequency control in order to have 50.0 kHz. c) Switch to 500 Hz frequency range.

Note the voltage between REG and GND.

d) Switch to 50 kHz frequency range.

Adjust VC1 in order to have the same potential measured in step 3).

e) Repeat step 2 to 4.

2 ADJUSTMENT OF OUTPUT VOLTAGE a) Adjust AMP control for maximum signal.

b) Adjust VARIABLE control for minimum frequency,

5 kHz range.

c) Connect an AC multimeter to OUTPUT 600 .

d) Adjust RV3 to get 3.250 V rms


3) VERIFICATIONS a) Set the instrument to 5 kHz range.

b) Connect an oscilloscope to the OUTPUT 600 .

c) Check the signal stability for all frequencies.

d) Check the presence of a sine signal.

e) Check the isolation of the BNC from the earth.


Subject to change without notice

C a l i b r a t i o n



Font panel, buttons


– Connect the multimeter (HM8012, 50 V


) to the OUT-

PUT 600Ω

– Select 5 kHz frequency range, VARIABLE control to the left, AMPL. control to the right

– Output voltage must be between 3.100 and 3.300 V rms

– Set AMPL. Control to the left. Output voltage must be below 0.320 V rms

– Connect the multimeter to the SYNC OUTPUT. Reading voltage must be between 0.6 and 0.750 V rms b) FREQUENCY LIMITS

– Select 50 kHz frequency range

– VARIABLE control to the left: frequency readings below 4.9

– VARIABLE control to the right: frequency readings above 50.5


– Check the VARIABLE control linearity. AMPL. Control to the right, 5 kHz range

– Turn slowly the AMPL. control from right to left. The signal must be a sine signal without visual distorsion

– Set the AMPL. control to the right. Push the fi rst 20 dB button. Set the oscilloscope for 10 X sensitivity. The signal must have 6 divisions amplitude.

– Push the second 20 dB button and release the fi rst one. The amplitude of the signal must be the same.

– Check the presence of the SYNC signal.


Check the isolation between ground and earth with a component tester


1.00 kHz 1-10 kHz range

0.01 0.003

HM8037 KROHN Variable Max.



50 Hz


10 - 100


20 Hz left

500 Hz 100 - 1k

50 kHz 100 - 1k

100 Hz left


50 kHz 10 - 110k 10 kHz

50 kHz 10 - 110k 20 kHz

50 kHz 10- 110k right









– Connect a 600Ω load and an oscilloscope to the OUTPUT


– Adjust the oscilloscope in order to have a 6 divisions amplitude signal

– Check that the amplitude is stable on all frequency ranges, for all positions of the VARIABLE control potentiometer.

Subject to change without notice


C i r c u i t a n d l a y o u t d i a g r a m s


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C i r c u i t a n d l a y o u t d i a g r a m s

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C i r c u i t a n d l a y o u t d i a g r a m s


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C i r c u i t a n d l a y o u t d i a g r a m s

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C i r c u i t a n d l a y o u t d i a g r a m s


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C i r c u i t a n d l a y o u t d i a g r a m s

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N o t e s


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N o t e s

Subject to change without notice



Spectrum Analyzer

Power Supplies

Modular System

8000 Series

Programmable Instruments

8100 Series authorized dealer

w w w . h a m e g . d e

Subject to change without notice

4S-8037-02E0 / 04-11-2005-gw

© HAMEG Instruments GmbH

A Rohde & Schwarz Company

® registered trademark

DQS-Certifi cation: DIN EN ISO 9001:2000

Reg.-Nr.: 071040 QM

HAMEG Instruments GmbH

Industriestraße 6

D-63533 Mainhausen

Tel +49 (0) 61 82 800-0

Fax +49 (0) 61 82 800-100 [email protected]

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