Hameg HM8037 Low distortion generator service manual 电路图.pdf

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1、Service-Manual Low Distor tion Gener ator H M 8 0 3 7 - 2 RadioFans.CN 收音机爱 好者资料库 2 Subject to change without notice 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 pro

2、duct 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- a

3、nd 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

4、 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

5、 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. Si

6、gnal 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 -

7、 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 e

8、quipment 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 General in

9、formation regarding the CE marking Die HAMEG Instruments GmbH bescheinigt die Konformitt fr das Produkt The HAMEG Instruments GmbH herewith declares conformity of the product HAMEG Instruments GmbH dclare la conformite du produit Bezeichnung / Product name / Designation: Klirrarmer Sinus-Generator L

10、ow Distrotion Generator Gnrateur sinusodales 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 ergnzt durch 91/263/EWG, 92/31/E

11、WG EMC Directive 89/336/EEC amended by 91/263/EWG, 92/31/EEC Directive EMC 89/336/CEE amende par 91/263/EWG, 92/31/CEE Niederspannungsrichtlinie 73/23/EWG ergnzt durch 93/68/EWG Low-Voltage Equipment Directive 73/23/EEC amended by 93/68/EEC Directive des equipements basse tension 73/23/CEE amende pa

12、r 93/68/CEE Angewendete harmonisierte Normen / Harmonized standards applied / Normes harmonises utilises Sicherheit / Safety / Scurit 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 berspannungskategorie / O

13、vervoltage category / Catgorie de surtension: II Verschmutzungsgrad / Degree of pollution / Degr de pollution: 2 Elektromagnetische Vertrglichkeit / Electromagnetic compatibility / Compatibilit lectromagntique EN 61326-1/A1 Straussendung / Radiation / Emission: Tabelle / table / tableau 4, Klasse /

14、Class / Classe B. Strfestigkeit / Immunity / Imunitee: Tabelle / table / tableau A1. EN 61000-3-2/A14 Oberschwingungsstrme / Harmonic current emissions / missions de courant harmonique: Klasse / Class / Classe D. EN 61000-3-3 Spannungsschwankungen u. Flicker / Voltage fl uctuations and fl icker / Fl

15、uctuations de tension et du fl icker. Datum/Date/Date 15.01.2001 Unterschrift / Signature / Signatur Manuel Roth Manager Hersteller HAMEG Instruments GmbH KONFORMITTSERKLRUNG Manufacturer Industriestrae 6 DECLARATION OF CONFORMITY Fabricant D-63533 Mainhausen DECLARATION DE CONFORMITE RadioFans.CN 收

16、音机爱 好者资料库 3 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 RadioFans.CN 收音机爱 好者资料库 4 Subject to change with

17、out notice HM8037-2 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 Frequency range 5Hz 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

18、0.01% (20Hz-10kHz) Output voltage 1.5Vrms into 600 Mainframe HM8001-2 required for operation Distortion Meter HM8027 Mainframe HM8001-2 HZ33, HZ34 Test cable BNC/BNC 5 Subject to change without notice Specifications HAMEG Instruments GmbH Industriestr. 6 D-63533 Mainhausen Tel +49(0)6182 8000 Fax +4

19、9(0)6182 800100 A Rohde HZ22 50feed-through termination; HZ10 Silicone test leads 6 Subject to change without notice 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) Frequen

20、cy coarse adjustment from 5 Hz to 50 kHz in 4 de- cade 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 fi xed attenuators of 20 dB. They can be used separa-

21、 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 c

22、hassis are connected with each other. SYNCHRONIZING OUTPUT (BNC connector) Short-circuit-proof trigger signal output of same phase and amplitude as . Output amplitude is 2 Vpp open circuit. Output impedance is 1 k . 600 OUTPUT (BNC connector) Short-circuit-proof signal output of generator. Output im

23、- pedance 600 . AMPLITUDE (adjusting knob) Continous adjustment of output amplitude from 0dB to 20 dB when output is terminated with 600 . 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)

24、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 ADJ

25、USTMENT 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 Vrms. 3) VERIFICATIONS a) Set the instrument to 5 kHz range. b) Connect an oscilloscope to the OUT

26、PUT 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. 7 Subject to change without notice Calibration Calibration VISUAL CONTROL Font panel, buttons ELECTRICAL CONTROL a) OUTPUT AMPLITUDE: Connect the mul

27、timeter (HM8012, 50 VAC) to the OUT- PUT 600 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 Vrms Set AMPL. Control to the left. Output voltage must be below 0.320 Vrms Connect the multimeter to the SYNC OUTPUT. Re

28、ading voltage must be between 0.6 and 0.750 Vrms 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 c) DISTORSION LEVELS (with KROHN HITE) Check the VARIABLE control linearity. AM

29、PL. Control to the right, 5 kHz range VARIABLE KROHN-HITE MAX (%) TYPICAL (%) 1.00 kHz 1-10 kHz range 1.20 kHz 1.40 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

30、 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 600 load and an oscilloscope to the OUTPUT 600 Adjust the oscilloscope in order to have a 6 divisions am- plitude signal Ch

31、eck that the amplitude is stable on all frequency ranges, for all positions of the VARIABLE control potentiometer. 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 os

32、cilloscope 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 compo-

33、 nent tester 8 Subject to change without notice Circuit and layout diagrams 9 Subject to change without notice Circuit and layout diagrams 10 Subject to change without notice Circuit and layout diagrams 11 Subject to change without notice Circuit and layout diagrams p 12 Subject to change without no

34、tice Circuit and layout diagrams 13 Subject to change without notice Circuit and layout diagrams 14 Subject to change without notice Notes 15 Subject to change without notice Notes w w w . h a m e g . d e authorized dealer Oscilloscopes Spectrum Analyzer Power Supplies Modular System 8000 Series Pro

35、grammable Instruments 8100 Series Subject to change without notice 4S-8037-02E0 / 04-11-2005-gw HAMEG Instruments GmbH HAMEG Instruments GmbH Industriestrae 6 A Rohde & Schwarz Company D-63533 Mainhausen registered trademark Tel +49 (0) 61 82 800-0 DQS-Certifi cation: DIN EN ISO 9001:2000 Fax +49 (0) 61 82 800-100 Reg.-Nr.: 071040 QM saleshameg.de 4S-8037-02E0