INSTRUCTION MANUAL MANUAL DE INSTRUCCIÓN Model 4040A MODELO 4040A 20 MHz SWEEP/FUNCTION GENERATOR with FREQUENCY COUNTER 20 MHz GENERADOR DE BARRIDO/FUNCIONES CON CONTADOR DE FRECUENCIA2 TEST INSTRUMENT SAFETY WARNING Normal use of test equipment exposes you to a certain amount of danger from electrical shock because testing must sometimes be performed where exposed voltage is present. An electrical shock causing 10 milliamps of current to pass through the heart will stop most human heartbeats. Voltage as low as 35 volts dc or ac rms should be considered dangerous and hazardous since it can produce a lethal current under certain conditions. Higher voltages pose an even greater threat because such voltage can more easily produce a lethal current. Your normal work habits should include all accepted practices to prevent contact with exposed high voltage, and to steer current away from your heart in case of accidental contact with a high voltage. You will significantly reduce the risk factor if you know and observe the following safety precautions: 1. Don't expose high voltage needlessly. Remove housings and covers only when necessary. Turn off equipment while making test connections in high-voltage circuits. Discharge high-voltage capacitors after removing power. 2. If possible, familiarize yourself with the equipment being tested and the location of its high voltage points. However, remember that high voltage may appear at unexpected points in defective equipment. 3. Use an insulated floor material or a large, insulated floor mat to stand on, and an insulated work surface on which to place equipment: and make certain such surfaces are not damp or wet. 4. Use the time proven "one hand in the pocket" technique while handling an instrument probe. Be particularly careful to avoid contacting a nearby metal object that could provide a good ground return path. 5. When testing ac powered equipment, remember that ac line voltage is usually present on some power input circuits such as the on-off switch, fuses, power transformer, etc. any time the equipment is connected to an ac outlet, even if the equipment is turned off. (continued on inside back cover)Instruction Manual for Model 4040A 20 MHz SWEEP/FUNCTION GENERATOR with FREQUENCY COUNTER 22820 Savi Ranch Parkway • Yorba Linda, CA 92887 3TABLE OF CONTENTS TEST INSTRUMENT SAFETY ...........inside front cover INTRODUCTION ........................................................ 5 SPECIFICATIONS ...................................................... 6 CONTROLS AND INDICATORS ................................ 8 OPERATING INSTRUCTIONS ................................. 11 Frequency and Waveform Selection . ......................... .11 Duty Cycle Control ................................................... 13 Burst Operation ......................................................... 14 AM Operation ........................................................... 15 FM Operation ............................................................ 16 TTL/CMOS Output ................................................... 17 Voltage Controlled Frequency Operation ........................17 Sweep Operation............................................................ 18 Use of Frequency Counter with External Signals ............ 18 Output Protection Considerations ................................... 19 Function Generator Applications Guidebook .................. 19 MAINTENANCE ..........................................................20 Fuse Replacement .......................................................... 20 Instrument Repair Service ..............................................20 Customer Support ...........................................................21 WARRANTY SERVICE INSTRUCTIONS .................... 22 LIMITED TWO-YEAR WARRANTY............................ 23 SPANISH MANUAL ......................................................25 4INTRODUCTION The B&K Precision Model 4040A Sweep/Function Generator is a versatile signal source which combines several functions into one unit - waveform generation, pulse generation (through variable symmetry), and frequency sweep. Additionally, the instrument provides the added convenience of a built-in frequency counter. This permits more accurate determination of output frequency than is possible with a simple calibrated dial. Coarse and fine tuning controls permit precision stability of the output frequency. The internal frequency counter can also be used to measure external frequencies. The five-digit frequency counter displays the generator output frequency or external signals from 5 to 30MHz. With this versatility, the unit has a vast number of applications in both analog and digital electronics in the engineering, manufacturing, servicing, educational, and hobbyist fields. The heart of the function generator is a VCG (voltage-controlled generator) that produces precision sine, square, or triangle waves over the 0.2Hz to 20MHz range. This encompasses subaudible, audio, ultrasonic, and RF applications. A continuously variable dc offset allows the output to be injected directly into circuits at the correct bias level. The sweep generator offers linear or log sweep with variable sweep rate and adjustable sweep time. Front panel controls allow the start and stop frequencies to be set. Burst operation enables the output to be gated by an internal, adjustable signal or by an externally applied signal. Variable symmetry of the output waveform converts the instrument to a pulse generator capable of generating rectangular waves or pulses, ramp or sawtooth waves, and slewed sine waves. The output can be either amplitude modulated or frequency modulated. Modulation can be by a 1 kHz internal, adjustable signal or by an externally applied signal. In addition to the above features, an external voltage may be used to control operating frequency. This is useful in situations where an externally controlled frequency is desirable. Many functions can be operated simultaneously, making possible such complex outputs such as gated pulse trains with external or internal sweep. 5SPECIFICATIONS Square Wave Symmetry: ≤2% 0.2Hz to 100kHz Rise Time: ≤30ns (Typical) Overshoot & Undershoot ≤5% TRIANGLE WAVE Linearity: ≥98% to 100kHz TTL OUTPUT Level: > 2.4V Rise Time: ≤20 nS Duty Cycle: 50% typical CMOS OUTPUT Max