®_ PER ATING AN® S E R V I C E M A N U A L FREQUENCY COUNTER 5382A HEWLETT ~ PACKARD CERTIFICATION The Hewlett-Packard Company certifies that this instrument was thoroughly tested and inspected and found to meet its published specifications when it was shipped from the factory. The Hewlett- Packard Company further certifies that its calibration measure- ments are traceable to the U.S. National Bureau of Standards to the extent allowed by the Bureau's calibration facility. WARRANTY AND ASSISTANCE This Hewlett-Packard product is warranted against defects in materials and workmanship. This warranty applies for one year from the date of delivery, or, in the case of certain major com- ponents listed in the manual, for the specified period. We will repair or replace products which prove to be defective during the warranty period provided they are returned to Hewlett- Packard. No other warranty is expressed or implied. We are not liable for consequential damages. Service contracts or customer assistance agreements are available for Hewlett-Packard products that require maintenance and repair on-site. For any assistance, contact your nearest Hewlett-Packard Sales and Service Office. FREQUENCY COUNTER 5382A OPERATING AND SERVICE MANUAL SERIAL PREFIX: 1408A This manual applies directly to HP Model 5382A Fre- quency Counters having serial number prefix 1408A. NEWER INSTRUMENTS This manual, with enclosed "Manual Changes" sheet, applies to HP Model 5382A Frequency Counters having serial number prefixes as listed on the "Manual Changes" sheet. Copyright HEWLETT-PACKARD COMPANY 1974 5301 STEVENS CREEK BLVD., SANTA CLARA, CALIF. 95050 Printed: MAY 1974 MANUAL PART NUMBER 05382-90001 MICROFICHE PART NUMBER 05382-90002 PRINTED IN U.S .A. HEWLETT&I PACKARD Model 5382A Table of Contents TABLE OF CONTENTS Section Title Page I GENERAL INFORMATION . 1-1 1-1 . Introduction . 1-1 1-3. Instrument Description . 1-1 1-5. Instrument Identification . 1-1 1-8. Specifications . 1-2 II INSTALLATION AND OPERATION . 2-1 2-1. Introduction . 2-1 2-3. Unpacking and Inspection . 2-1 2-5. Storage and Shipment . 2-1 2-8. Line Voltage Selection . 2-1 2-11. Operation . 2-2 2-13. Cable and Termination Requirements . 2-2 2-15. Ratio Measurements (Standard Counter Only) . 2-2 2-18. Optimizing Noise Rejection . 2-2 III MAINTENANCE . 3-1 3-1. Introduction . 3-1 3-3. Theory of Circuit Operation . 3-1 3-5. Input Circuits . 3-2 3-7. Decade Counter, Latch, and Multiplexer Circuits . 3-2 3-9. Time Base Oscillator and Divider . 3-2 3-14. Display Scanner . 3-2 3-17. Display Blanking Circuits . 3-3 3-20. Reset and Transfer Control Circuits . .. 3-3 3-22. Recommended Test Equipment . 3-3 3-24. In-Cabinet Performance Check . 3-4 3-26. Instrument Access . 3-4 3-28. Preventive Maintenance . 3-6 3-30. General Repair . 3-7 3-34. Adjustments . .. 3-7 3-36. Amplifier Balance Adjustment . 3-7 3-38. Oscillator Adjustment (Standard Unit) . 3-7 3-40. Oscillator Adjustment (Option 001 Unit) . 3-8 3-42. Troubleshooting . 3-8 3-45. Replaceable Parts . 3-8 3-47. Ordering Information . 3-10 3-49. Schematic Diagram . 3-10 Model 5382A List of Tables List of Figures LIST OF TABLES Table Title Page 1-1. Specifications . 1-1 3-1. Recommended Test Equipment . 3-4 3-2. In-Cabinet Performance Check . 3-5 3-3. Replaceable Parts . 3-12 3-4. Manufacturers Code List . 3-15 3-5. Major Signal Definitions . 3-17 LIST OF FIGURES Figure Title Page 1-1. Model 5382A Frequency Counter . 1-1 2-1. Power Cord Connector for 240-Volt Operation . 2-1 2-2. Front-Panel Operating Controls, Connectors, and Indicators . 2-3 2-3. Rear-Panel Operating Controls and Connectors . 2-4 3-1. Simplified Block Diagram . 3-1 3-2. Troubleshooting Flow Chart . 3-9 3-3. Schematic Diagram Notes . 3-16 3-4. Instrument Timing Diagram . 3-18 3-5. Component Locators . 3-19 3-6. Overall Schematic Diagram . 3-21 Model 5382A General Information SECTION 1 GENERAL INFORMATION 1-1 . INTRODUCTION 1-2. This section of the manual gives a description of the instrument, information on instrument identification and available options, and complete specifications. 1-3. INSTRUMENT DESCRIPTION 1-4. The HP Model 5382A Frequency Counter (see Figure 1-1) is a direct-counting frequency counter that has a range of 10 Hz to 225 MHz. Eight display digits are provided . Front-panel controls allow a selection of gate times and attenuation factors of the input signal. A rear-panel connector and associated selector switch allow connection of an external time base oscillator. This feature also allows ratio measurements to be made by the counter. When the optional temperature compensated crystal oscillator is included (Option 001), the switch is not provided and the connector allows external use of the 10 MHz time base oscillator . Refer to Table 1-1 for all counter specifications. 1-5. INSTRUMENT IDENTIFICATION 1-6. Hewlett-Packard uses a 2-section, 10-character serial number (OOOOA00000) mounted on the rear panel to identify the instrument . The first four digits are the serial prefix and the last five digits refer to the specific instrument . The alphabetical character identifies the country of manu- facture. If the serial prefix on your instrument differs from that listed on the title page of this manual, there are differences between the manual and your instrument . Any lower serial pre- fixes are documented separately in this manual, and higher serial prefixes are covered by a manual change sheet included with the manual . 1-7. The printed circuit boards within the instrument are identified by a 2-section, 10-digit part number (e.g., 05382-60001) and a 4-digit series number (e.g., "SERIES 1404"). The series num- ber identifies the electrical characteristics of the complete printed-circuit assembly . A replace- ment circuit-board assembly may have a different series number than the assembly originally supplied with the instrument . Therefore, when troubleshooting a circuit-board assembly, ensure that the series number on the schematic diagram matches the series number on the board assem- bly. If the series number on the assembly is lower than the number on the schematic diagram in Section III, refer to backdating information in this manual for change information. If the series number on the assembly is higher than the number on the schematic diagram, the change infor- mation is provided in a manual change sheet which is available from the nearest Hewlett- Packard Sales and Service Office. Figure 1-1. Model 5382A Frequency Counter Model 5382A General Information 1-8. SPECIFICATIONS 1-9. Table 1-1 lists all specifications of the frequency counter. Table 1-1 . Specifications Frequency Range: 10 Hz to 225 MHz Display: 8 Digit (LEDs) Input Impedance: 1 MQ, <40 pf Sensitivity: 25 mV (rms sinewave) 30 Hz to 10 MHz 50 mV (rms sinewave) 10 Hz to 225 MHz Input Attenuator: Three Position (xl, x10, x100) Maximum Input Levels: DC to 40 Hz 200 V (dc + Peak ac) ATTENUATOR 40 Hz to 100 kHz 250 V rms 14x1" 100 kHz to 5 MHz 2.5 x 107 V Hz >5 MHz 5 V rms DC to 40 Hz 200 V (dc + Peak ac) ATTENUATOR 40 Hz to 1 MHz 250 V rms "x10" 1 MHz to 50 MHz 2.5 x 108 V Hz "x100" 50 MHz to 225 MHz 5 V rms Accuracy: tl Count t Time Base Accuracy Gate Times: Manually Selected .1 second, 1 second, 10 seconds Resolution : 10 Hz at 0.1 second gate time 1 Hz at 1 second gate time 0.1 Hz at 10 second gate time Time Base: Internal Frequency: 10 MHz Crystal Aging: <0.3 ppm/Month Temperature: t2.5 ppm 0°C to 40°C Line Voltage: t0.5 ppm for 10% line variation External Input Frequency Range: 100 kHz to 10 MHz Sensitivity: 250 mV rms 1 KSZ input impedance Maximum Input: 25 V rms do to 10 MHz Operating Temperature: 0°C to 40°C Power Requirements: 100, 120, 220, and 240 V rms (48 Hz to 440 Hz) (+5%-15%) 20 VA max. Weight: Net: 4.75 lb (2,2 kg) Shipping: 6 lb (2,8 kg) Dimensions: 3.5 in. H x 6.25 in. W x 9.75 in. D (89 mm x 160 mm x 248 mm) OPTION 001 Temperature Compensated Crystal Oscillator Frequency: 10 MHz Aging: <1 part in 10'/Month Temperature: t1 ppm 0°C to 40°C Line Voltage: 1 part in 107 for 10% change External input replaced with Oscillator Monitor Output on Option 001 Model 5382A Installation and Operation SECTION 11 INSTALLATION AND OPERATION 2-1. INTRODUCTION 2-2. This section of the manual provides information about unpacking, inspecting, storing, and shipping the frequency counter and gives instructions for operating the counter. Descriptions of all controls, connectors, and indicators are.