2001A 200KHz Function Generator Instruction Manual 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.testequipmentdepot.com
WARRANTY Global Specialties certifies that all products manufactured conform to published specifications and are free from defects in materials and workmanship for a period of Three (3) years from the date of delivery when used under normal operating conditions and within the service conditions for which they were furnished. The obligation of Global Specialties arising from a Warranty claim shall be limited to repairing, or at its option, replacing without charge, any product which in Global Specialties's sole opinion proves to be defective within the scope of the Warranty. Global Specialties must be notified in writing of the defect or nonconformity within the Warranty period and the affected product returned to Global Specialties within (30) days after discovery of such defect or nonconformity. Although Quick Servicing Guidelines are provided in the manual, the unit doesn't contain any user serviceable parts. Global Specialties shall have no responsibility hereunder for any defect or damage caused by improper storage, improper installation, unauthorized modification, neglect, inadequate maintenance, accident or for any product which has been repaired or altered by anyone other than Global Specialties. EXCLUSION OF OTHER WARRANTIES The Warranty described above is Buyer's sole and exclusive remedy and no other warranty, whether written or oral, is expressed or implied. Global Specialties specifically desclaims the implied warranties of merchantability and fitness for a particular purpose. No statement, representation, agreement, or understanding, oral or written, made by an agent, distributor, representative, or employee of Global Specialties, which is not contained in the foregoing Warranty will be binding upon Global Specialties, unless made in writing and executed by an authorized Global Specialties employee. Under no circumstances shall Global Specialties be liable for any direct, indirect, special, incidental, or consequential damages, expenses, losses, or delays (including loss of profits) based on contract, tort, or any legal theory. MODEL NO. : 2001A SR. NO. :...
Contents Section Description Page No. Section 1 General Description 1 GENERAL DESCRIPTION 1 1.1 Introduction 1 1.2 Applications 1 1.3 Specifications 1 1.4 Accessories 2 2 INSTALLATION 3 2.1 Inspection 3 2.2 Power Requirements 3 2.3 Safety Considerations 3 3 OPERATION 4 3.1 Front Panel Controls 4 3.2 Rear Panel Controls 5 3.3 Precautions 6 3.4 Operating Procedure 6 4 MAINTENANCE 8 4.1 Maintenance 8 4.2 Servicing 8 5 CIRCUIT DIAGRAMS 9 6 MANUAL CHANGES 14 1.1 INTRODUCTION The Model 2001A is a very useful instrument for any test requirement. It is a easy to use, compact 0.2Hz to 200KHz Function Generator. This manual contains information pertaining to the specifications, installation and operation of 200KHz Function Generator Model 2001A. 1.2 APPLICATIONS The function generator can be used to test the frequency response of low frequency amplifiers, attenuators, filters, etc besides being a source of the most commonly used waveforms. TTL output is provided to synchronise other circuitry or for direct use with logic circuits. SWEEP IN terminal can be used to sweep the output frequency using external voltage. 1.3 SPECIFICATIONS FUNCTION GENERATOR Waveform : Sine, Triangle, Square. Frequency Range : 0.2Hz to 200KHz in 6 decade ranges. Frequency : ±5% of the setting at 10Hz, 100Hz, Indication Accuracy 1KHz & 10KHz spot. Function Out : 1mV to 10V p-p (with 4 selectable ranges; into open circuit). TTL Out : Standard TTL level squarewave. Rise/Fall Time : <25ns. DC Offset : ±5V DC into open circuit. AC (signal) + DC (offset) = ±10V p-p open circuit ±5V p-p into 600 ohms. Level Fine : 20dB variable (approx.). 1
Level Ranges : 1mV - 10mV p-p, 10mV - 100mV p-p, 100mV - 1V p-p & 1V p-p - 10V p-p. Sine wave Distortion : <2% upto 100KHz (<1% typical) <3% above 100KHz. Squarewave : Time symmetry : ±1.5% (typical <1%) Rise/Fall Time : <100ns (into 600 ohms +20pf). Triangle Linearity : Better than 1%. Sweep Input : 0 to +10V DC. Sweep Range : 100:1 approx. (For external input at SWEEP IN). Input Impedance : 30K ohms approx. GENERAL Power : 115 / 230V AC ±10%,47-63Hz. Consumption : 5VA. Dimensions (mm) : 245 (W) x 76 (H) x 185 (D) mm (approx.). 9½ x 3 x 7¼ Weight : 2 Kg. / 4.5 lbs (approx.). 1.4 ACCESSORIES 1. BNC to BNC - 1 2. Operation Manual - 1 3. Power Cord - 1 Section 2 Installation 2.1 INSPECTION The instrument is packed in a corrugated sheet box. As soon as the unit is received, carefully open the box and inspect it for any damage that may have occurred during transit. Save all packing material. If any damage is found, notify the carriers and our authorised representatives or ourselves immediately. Also check whether all the specified accessories are present. 2.2 POWER REQUIREMENTS The instrument operates over a nominal 115V ±10%, 60Hz or 230V AC ±10% 50Hz AC line. A power cord has been provided to connect the instrument to proper source. 2.3 SAFETY CONSIDERATIONS 2.3.1 Prior to applying power to the instrument, ensure that earth is extended to the mains socket. Intentional interruption of the grounding system, by use of two-wire plug adapters or two wire extension cords must be considered an unsafe practice. 2.3.2 Be sure that only correct fuse with proper V & A ratings is installed for replacement purposes. INCORRECT FUSE RATING CAN RESULT IN FIRE &/OR SERIOUS DAMAGE OR HARM TO HUMAN LIFE & PROPERTY. 2 3
Section 3 Operation 3.1 FRONT PANEL CONTROLS The front panel controls are functionally grouped and clearly designated for ease of operation. Their functions are described below : 1. FREQUENCY DIAL This is frequency setting with a calibrated dial. The output frequency is multiplication of the reading on dial and FREQ. MULT (Frequency multiplier) setting. 2. FREQ. MULT. SWITCH This switch selects the desired frequency range of the function generator, in decades. 3. FUNCTION SWITCH Selects Sine, Triangle or Square wave output of the Function Generator. The TTL output is not affected by this switch position. 4. LEVEL RANGE This is 4 position output attenuator switch. The ranges from 1mV - 10mV, 10mV - 100mV, 100mV - 1V & 1V - 10V p-p can be selected. 5. OUTPUT CONNECTOR This is a BNC connector for the function output. 6. LEVEL FINE This is a continuously variable level control with approx. 20dB range. 7. DC OFFSET Zero when feature not selected, ±5V DC into open circuit when selected. 8. TTL OUT CONNECTOR Square wave output (TTL) is available at this connector. The TTL signal is in phase with function output. 9. SWEEP IN DC voltage input to control function generator frequency (VCG). Input voltage should be with range of 0 to ±10V DC. 10. POWER ON LED This LED indicate that power is on. 3.2 REAR PANEL CONTROLS 1. POWER ON/OFF SWITCH The Function Generator can be turned ON/OFF by this rear panel switch. 2. FUSE This is a fuse in series with mains supply (for 230V - 100mA & for 115V - 250mA). Fig. 3.1 Front Panel Controls Fig. 3.2 Rear Panel Controls 4 5
3. MAINS SELECTOR This switch select the mains input as either 115V or 230V. Factory set to 115V. 4. MAINS IN This is the AC mains input to the Function Generator. Power input required is 115V ±10%, 60Hz or 230V ±10%, 50Hz. 5. EARTH TERMINAL This terminal for connection of external earth to the instrument. Note : 1) To get full sweep range from DC voltage input applied at SWEEP IN terminal ensure frequency dial at minimum position for 0 to +10V input and keep frequency dial at maximum position for 0 to -10V input. A bipolar ac signal will produce a sweep up & down from the set frequency. 2) Total sweep range is function of frequency dial position and input voltage at SWEEP IN terminal. 3) Frequency dial sweep range is 10:1 while frequency sweep range of 100:1 is possible by means of external sweep input 0 to ±10V as per specification given above. 3.3 PRECAUTIONS To obtain the optimum performance of the 2001A, the following procedure should be adopted. 1. Select a location free from dust and humidity. 2. Do not operate the instrument where mechanical vibrations are excessive or near a instrument which generates strong electric or magnetic fields. 3. Although the output is short circuit protected, DO NOT intentionally short the output. 3.4 OPERATING PROCEDURE After power ON, set RANGE switch to desired frequency range. The frequency can be set by using the frequency dial. The function switch selects the desired waveform. The generator output level is set by LEVEL FINE control and LEVEL RANGE. The RANGE control directly indicates the output level in p-p. The variable LEVEL FINE control has a range of approximate 20dB. The TTL output is available at all times in phase with the Function generator output. This can be used for various applications like trigerring an oscilloscope sweep or as a independent output to measure the frequency more accurately on a Frequency counter or directly interfacing to digital circuits. 6 7
Section 4 Maintenance Section 5 Circuit Diagrams 4.1 MAINTENANCE The instrument has a rugged mechanical construction and will withstand normal handling and wear easily. As such, the unit needs very little maintenance. The unit may be cleaned with a soft dry cloth. No solvents should be used to clean the unit. While operating the unit, make sure that air circulation around the unit is not obstructed and the slits for ventilation are not closed. Every time you change a fuse, make sure that fuse is of proper type & rating. 4.2 SERVICING The unit has no user servicable parts. So get the unit serviced from GLOBAL SPECIALTIES only. We suggest the following procedure while returning the unit for service : To ensure safe handling, preserve original packing material and use it. Call Global Specialties Customer Service at 1-800-572-1028 & get a RMA no. Be sure to attach a label to the unit, specifying the owner and the fault observed with a brief description. Fig. 5.1 Function & Range Selection Circuit 8 9
Fig. 5.2 Osc. & Function Generator Circuit Fig. 5.3 100KHz Function Generator Output Amp. Circuit 10 11
Fig. 5.4 Sine to Square Convertor Circuit Fig. 5.5 Power Supply Circuit 12 13
Section 6 Manual Changes 14
SERVICE AND WARRANTY INFORMATION For instructions on how to obtain a return merchandise authorization number (RMA), please visit our website, or call our customer service department. 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.testequipmentdepot.com Global Specialties will service and repair this instrument free of charge for a period of 3 full years, subject to the warranty conditions below. WARRANTY Global Specialties warrants the PB-503 to be free from defective material or workmanship for a period of 3 full years from date of original purchase. Under this warranty, Global Specialties is limited to repairing the defective device when returned to the factory, shipping charges prepaid, within 3 full years from date of original purchase. Units returned to Global Specialties that have been subject to abuse, misuse, damage or accident, or have been connected, installed or adjusted contrary to the instructions furnished by Global Specialties, or that have been repaired by unauthorized persons will not be covered by this warranty. Global Specialties reserves the right to discontinue models, change specifications, price or design of this device at any time without notice and without incurring any obligation whatsoever. The purchaser agrees to assume all liabilities for any damages and/or bodily injury which may result from the use or misuse of this device by the purchaser, his employees, or agents. This warranty is in lieu of all other representations or warranties expressed or implied and no agent or representative of Global Specialties is authorized to assume any other obligation in connection with the sale and purchase of this device. All rights reserved. No Part of this book shall be reproduced, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying recording, or otherwise, without written permission from the publisher. No patent liability is assumed with respect to the use of the information contained herein. While every precaution has been taken in the preparation of this book, the publisher assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein.