Hameg HM8037 Low Service Manual

Low Distortion Generator

HM8037-2

Service-Manual

General information regarding the CE marking

Hersteller HAMEG Instruments GmbH KONFORMITÄTSERKLÄRUNG
Manufacturer Industriestraße 6 DECLARATION OF CONFORMITY
Fabricant D-63533 Mainhausen DECLARATION DE CONFORMITE

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:
Klirrarmer Sinus-Generator
Low Distrotion Generator
Générateur sinusoïdales à faible
distorsion

Typ / Type / Type: HM8037-2

mit / with / avec: HM8001/2

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

General information regarding the CE marking

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

15.01.2001 Unterschrift / Signature / Signatur

Manuel Roth
Manager

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

2

Subject to change without notice

Content

Declaration of Conformity 2

General information regarding the CE-marking 2

Function Generator

HM8037-2 4

Specifi cations 5

Control elements 6

Adjustment 6

Calibration 7

Circuit and layout diagrams 8

Subject to change without notice

3

HM8037-2

50 kHz Low-Distortion Sine Wave
Generator

HM8037

Frequency range 5 Hz to 50kHz

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 % (20Hz-10 kHz)

Output voltage 1.5 V

rms

into 600 Ω

Mainframe HM8001-2 required for operation

Distortion Meter HM8027

Mainframe HM8001-2

HZ33, HZ34
Test cable BNC/BNC

4

Subject to change without notice

Specifications

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

A Rohde & Schwarz Company

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. 0.08 % (50kHz range)
8 hrs. 0.6 % (50 kHz range)
15 min. 0.08 % (in all other ranges)
8 hrs. 0.5 % (in all other ranges)

Frequency display

3-digit, 7-segment LED display
Display accuracy: ±1 digit

Distortion factor

5 Hz - 20 Hz: max. 0.03 %
20 Hz -10 kHz: max. 0.01 %
1 kHz: typ. 0.005 %
10 kHz - 20 kHz: max. 0.03 %
20 kHz - 50 kHz: max. 0.05 %

Signal output (short-circuit proof)

Output voltage: 1.5 V into 600 Ω
Internal resistance: approx. 600 Ω
Amplitude flatness: max. ±0.2dB (5 Hz to 50 kHz)
Attenuation: min. 60 dB

2 fixed attenuators: each 20dB ± 0.2dB

variable control: 0 dB to 20 dB
Amplitude stability: 0.12 % (4 hrs.)

Synchronous output (short-circuit proof)

Output voltage: 2Vpp, sine wave
Internal resistance: ca. 1 kΩ

Miscellaneous

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
–15 V/30 mA
(∑ = 6.3 W)

Operating temperature: +10° C to +40° C
Max. relative humidity: 80% (without condensation)
Dimensions (W x H x D) (without 22-pole flat plug):

135 x 68 x 228 mm

Weight: approx. 0.65kg

Accessories supplied: Operator’s Manual
Optional accessories: HZ33/34 BNC Test Cable; HZ22 50

Ω feed-through

termination; HZ10 Silicone test leads

Subject to change without notice

5

Controls elements

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 de-

cade steps.

VARIABLE (adjusting knob)
Continous frequency adjustment.
Overlapping the ranges selected with

from x0,1 to x1 of selected range.

–20 dB Attenuators (pushbuttons)
Two fi xed attenuators of –20 dB. They can be used separa-

tely. When all buttons are pressed, a total attenuation of
–40 dB is obtained. Including the amplitude control
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.

SYNCHRONIZING OUTPUT
(BNC connector)
Short-circuit-proof trigger signal output of same phase

and amplitude as
Output impedance is 1 k

. Output amplitude is 2 Vpp open circuit.

.

. Setting range is

, the

Adjustment

1 ADJUSTMENT OF VREG
(CONTROL LOOP ERROR VOLTAGE)

a) Connect a DC multimeter (10V range) or an oscil-

loscope 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 mea-

sured 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 r ange.

c) Connect an AC multimeter to OUTPUT 600

d) Adjust RV3 to get 3.250 V

rms

.

.

600 OUTPUT (BNC connector)
Short-circuit-proof signal output of generator. Output im-

pedance 600

.

AMPLITUDE (adjusting knob)
Continous adjustment of output amplitude from 0dB to

–20 dB when output

6

Subject to change without notice

is terminated with 600 .

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.

.

Calibration

Calibration

VISUAL CONTROL

Font panel, buttons

ELECTRICAL CONTROL

a) OUTPUT AMPLITUDE:

– Connect the multimeter (HM8012, 50 V

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
– 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

b) FREQUENCY LIMITS

– Select 50 kHz frequency range
– VARIABLE control to the left: frequency readings be-

low 4.9
– VARIABLE control to the right: frequency readings

above 50.5

) to the OUT-

AC

rms

– 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.

ISOLATION KEY CHECKING

Check the isolation between ground and earth with a compo­nent tester

rms

c) DISTORSION LEVELS (with KROHN HITE)

– Check the VARIABLE control linearity. AMPL. Control

to the right, 5 kHz range

VARIABLE KROHN-HITE MAX (%) TYPICAL (%)

1.00 kHz 1-10 kHz range

1.20 kHz

1.4 0 kHz

1.60 kHz

1.80 kHz 0.01 0.003

2.00 kHz

2.20 kHz

2.40 kHz

2.60 kHz

2.80 kHz

HM8037 KROHN Variable Max. TYPICAL
HITE
RANGE RANGE (%) (%)

50 Hz 10 - 100 20 Hz
500 Hz 10-100 left
500 Hz 100 - 1k 100 Hz 0.01 0.003
50 kHz 100 - 1k left
50 kHz 10 - 110k 10 kHz
50 kHz 10 - 110k 20 kHz 0.03 0.0035
50 kHz 10- 110k right 0.05 0.015

OUTPUT ATTENUATORS CHECK

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

600Ω

– Adjust the oscilloscope in order to have a 6 divisions am-

plitude signal

– Check that the amplitude is stable on all frequency ranges,

for all positions of the VARIABLE control potentiometer.

Subject to change without notice

7

Circuit and layout diagrams

8

Subject to change without notice

Circuit and layout diagrams

Subject to change without notice

9

Circuit and layout diagrams

10

Subject to change without notice

Circuit and layout diagrams

Subject to change without notice

11

Circuit and layout diagrams

12

Subject to change without notice

Circuit and layout diagrams

Subject to change without notice

13

Notes

14

Subject to change without notice

Notes

Subject to change without notice

15

Oscilloscopes

Spectrum Analyzer

Power Supplies

Modular System

8000 Series

Programmable Instruments

8100 Series

authorized dealer

4S-8037- 02E0

www.hameg.de

Subject to change without notice
4S-8037-02E0 / 04-11-2005-gw HAMEG Instruments GmbH
© HAMEG Instruments GmbH Industriestraße 6
A Rohde & Schwarz Company D-63533 Mainhausen
® registered trademark Tel [phone]

DQS-Certifi cation: DIN EN ISO 9001:2000 Fax [phone]
Reg.-Nr.: 071040 QM [e-mail]