Krohn-Hite 4402B User manual

Model 4402B
Ultra-Pure Sinewave Oscillator
1Hz to 110kHz
Typical Distortion of 0.0005%
Serial No. ____________
Operating Manual
15 Jonathan Drive, Unit 4, Brockton, MA 02301 U.S.A.
Tel: [phone]; Fax: [phone]
www.krohn-hite.com; [e-mail]
Copyright © 2006 Krohn-Hite Corporation. All rights reserved. Contents of this publication may not be reproduced
in any form without the written permission of Krohn-Hite Corporation. Printed in USA - 7/06.

TABLE OF CONTENTS
SECTION 1 . . . GENERAL DESCRIPTION ............1-1
1.1 .....INTRODUCTION .....................1-1
1.2 .....SPECIFICATIONS ....................1-1
1.2.1 . . FREQUENCY .......................1-1
1.2.2 . . MAIN OUTPUTS .....................1-2
1.2.3 . . FIXED OUTPUT .....................1-2
1.2.4 . . QUADRATURE OUTPUT................1-3
1.2.5 . . GENERAL .........................1-3
1.2.6 . . OPTIONS ..........................1-3
SECTION 2 . . . OPERATION ..................... 2-1
2.1 .....POWERREQUIREMENTS...............2-1
2.2 .....OPERATINGCONTROLS AND CONNECTORS . 2-2
2.2.1 . . REAR PANEL .......................2-2
2.3 .....OPERATION........................2-3
2.3.1 . . FREQUENCY CONTROL................2-3
2.3.2 . . AMPLITUDE CONTROL ................2-3
2.3.3 . . FLOATING GROUND ..................2-3
SECTION 3 . . . INCOMING ACCEPTANCE ............3-1
3.1 .....INTRODUCTION .....................3-1
3.2 .....LISTOFEQUIPMENTREQUIRED.........3-1
3.3 .....PROCEDURE .......................3-2
3.3.1 . . DC LEVEL ADJUSTMENTS ..............3-2
3.3.2 . . FREQUENCY ACCURACY ..............3-2
3.3.3 . . MAIN OUTPUT AMPLITUDE.............3-2
3.3.4 . . AMPLITUDE FLATNESS................3-3
3.3.5 . . OUTPUT DISTORTION .................3-3
SECTION 4 . . . CIRCUIT DESCRIPTION .............4-1
4.1 .....THEORYOFOPERATION...............4-1
4.2 .....AVCOPERATION ....................4-2
SECTION 5 . . . MAINTENANCE ...................5-1
5.1 .....INTRODUCTION .....................5-1
5.2 .....EQUIPMENTREQUIRED ...............5-1
5.3 .....PRELIMINARYSET-UP ................5-2
5.4 .....PROCEDURE .......................5-2
Table of Contents - i
Table of Contents

SECTION 6 . . . CALIBRATION ...................6-1
6.1 .....INTRODUCTION .....................6-1
6.2 .....EQUIPMENTREQUIRED ...............6-1
6.3 .....TEST PROCEDURE ...................6-2
6.3.1 . . POWER SUPPLY CHECK ...............6-2
6.3.2 . . AVC ADJUSTMENT ...................6-2
6.3.3 . . OUTPUT DC LEVEL ADJUSTMENT ........6-2
6.3.4 . . FREQUENCY CALIBRATION (Bands x1-x1k) . 6-2
6.3.5 . . FREQUENCY CALIBRATION (x10k Band) ....6-3
6.3.6 . . DISTORTION CHECK ..................6-3
SECTION 7 . . . PARTS LIST ..................... 7-1
7.1 .....INTRODUCTION .....................7-1
ii - Table of Contents
Model 4402B Ultra-Pure Sinewave Oscillator

FIGURES
Section 1
Figure 1.1 . Typical Output Distortion ...............1-3
Section 2
Figure2.1.OperatingControlsandConnectors.........2-1
Section 3
Figure 3.1 . Test Set-Up for Measuring Amplitude Flatness. . 3-2
Figure3.2.AmplitudeFlatnessTestSet-Up ...........3-3
Section 4
Figure 4.1 . Model 4402B Simplified Block Diagram ......4-1
Figure4.2.SimplifiedAVCDiagram................4-2
Section 5
Figure 5.1A. . Troubleshooting Flowchart.............5-3
Figure 5.1B . . Troubleshooting Flowchart.............5-4
Table of Contents - iii
Table of Contents

iv - Table of Contents
Model 4402B Ultra-Pure Sinewave Oscillator
Model 4402B Sinewave Oscillator

SECTION 1
GENERAL DESCRIPTION
1.1 INTRODUCTION
The Model 4402B is an ultra-pure sinewave, stable amplitude oscillator designed to meet the needs of to-
day’s high precision 16 to 18 bit A/D converter testing, and audio test and measurement technology.
Covering the frequency range from 1Hz to 110kHz, with precise 3 digit frequency tuning, the 4402B pro-
duces a virtually “distortion-free” (<0.0005%) sinewave for measuring A/D converter accuracy, audio
preamplifier and power amplifier harmonic distortion. With its exceptionally flat response (0.02dB), the
4402B eliminates the need to constantly monitor voltage levels, during frequency response tests.
The 4402B provides a 7Vrms sinewave output, (balanced output, 14Vrms end-to-end), 3.5Vrms into 50
ohms, and has no loss in performance when loaded with a linear 50 ohm load.
A 3-position, push-button attenuator calibrated in 20dB steps, along with the a 30dB vernier, provides a
total dynamic range of 90dB.
Simultaneous fixed and quadrature (90°) outputs are provided. Each output is 7Vrms with 600 ohm
source impedance.
The 4402B is the perfect addition to your present test and/or precision measurement set-up.
1.2 SPECIFICATIONS
The following specifications apply to the Main, Quadrature and Fixed Outputs, except where noted.
1.2.1 FREQUENCY
Range: 1Hz to 110kHz.
Accuracy: ±0.5% of frequency setting.
Control: 2 digits of frequency, calibrated in 1Hz and 0.1Hz steps, with a calibrated vernier providing
continuous coverage between the 0.1Hz steps, plus a 5 decade push-button multiplier with overlapping
ranges.
Stability:
Vs. Time: 0.01% in 1 hour or less.
Vs. Temperature: 0.05%/°C.
Vs. Line: <0.001% for a 10% change in line voltage.
General Description - 1-1
General Description - Section 1

1.2.2 MAIN OUTPUTS
Maximum Amplitude: 7V rms open circuit (balanced output, 14V rms end-to-end); 3.5Vrms; +48dBm
into 50 ohm load (balanced output, 7V rms end-to-end).
Impedance: Constant 50 ohms.
Maximum Current: 75mA rms.
Minimum Amplitude: <0.2mV.
Amplitude Flatness: ±0.02dB, 1Hz to 110kHz.
Amplitude Stability:
Vs. Time: 0.01% in 1 hour or less.
Vs. Temperature: 0.05%/°C.
Vs. Line: <0.001% for a 10% change in line voltage.
Amplitude Control: A 4-position push-button attenuator calibrated in 20dB steps from 0dB to –60dB,
Accuracy, ±0.25dB/20dB step; Volts rms control with greater than 30dB of coverage calibrated in volts.
Accuracy: ±20% of setting.
Main Output Distortion:
Frequency Distortion % Distortion (dB)
1Hz to 10kHz <0.0005 –106
10kHz to 20kHz <0.0018 –95
20kHz to 50kHz <0.0056 –85
50kHz to 110kHz <0.01 –80
Hum and Noise: Greater than 110dB below signal (10Hz to 20kHz detector bandwidth).
1.2.3 FIXED OUTPUT
Amplitude: 7V rms open circuit; 3.5V rms (+13dBm) into 600 ohm load.
Impedance: Constant 600 ohms.
Amplitude Flatness, Amplitude Stability and Distortion: Same as Main Output.
Phase Accuracy (180°, top BNC, Main Output): 1Hz to 10kHz, ±0.4°; 10kHz to 110kHz, ±5°.
1.2.4 QUADRATURE OUTPUT
Amplitude: 7V rms open circuit; 3.5V rms (+13dBm) into 600 ohm load.
Impedance: Constant 600 ohms.
Amplitude Flatness: ±2dB, 1Hz to 110kHz.
Amplitude Stability: Same as Main Output.
Phase Accuracy (–90°): 1Hz to 1kHz, ±0.2°; 1kHz to 10kHz, ±1°; 10kHz to 110kHz, ±10°.
1-2 - General Description
Model 4402B Ultra-Pure Sinewave Oscillator

1.2.5 GENERAL
Ambient Temperature Range: 0°C to 50°C.
Power Requirements: Switch selectable, 90-132 or 180-264 volts, single phase, 50-60Hz, 18 watts.
Floating Ground: Rear panel switch floats circuitry ground from chassis ground up to 100V.
Dimensions: 312“ (8.9cm) high, 9" (23cm) wide, 812” (21.6cm) deep.
Weights: 5 lbs (2.3kg) net; 7 lbs (3.2kg) shipping.
Accessories: 3-terminal line cord and operating manual.
1.2.6 OPTIONS
Rack Mounting Kit: Part No. RK-39 permits the installation of the Model 4402B into a standard
19"rack spacing.
Extended 1 Year Warranty: Part No. EW4402B.
General Description - 1-3
General Description - Section 1
Optional Rack Mount Kit RK-39
Figure 1.1 Typical Output Distortion