B&K 4070A user manual

User manual for the device B&K 4070A

Device: B&K 4070A
Category: Portable Generator
Manufacturer: B&K
Size: 0.55 MB
Added : 9/23/2014
Number of pages: 88
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Summary of the content on the page No. 1


User’s Manual
Model 4070A
21.5MHz Multi Function Arbitrary Waveform Generator

Summary of the content on the page No. 2

Summary of the content on the page No. 3

B&K Precision Model 4070A User’s Manual B+K Precision Corp. ALL RIGHTS RESERVED PRODUCT AND DOCUMENTATION NOTICE: B+K Precision reserves the right to change this product and its documentation without prior notice. Information furnished by B+K Precision is believed to be accurate and reliable. However, B+K Precision assumes no responsibility for its use, nor for any infringement of patents, or other rights of third parties, which may result from its use

Summary of the content on the page No. 4

Table of Contents 1.0 Introduction 1.1 Description ..................................................................................................................................................................2 1.2 Feature summary .........................................................................................................................................................3 2.0 Installation and setup Detail explanation of input and output connectors ................

Summary of the content on the page No. 5

5.26 Voltage Controlled Oscillator (VCO) mode...........................................................................................................39 6.0 Remote operation 6.1 Introduction..................................................................................................................................................................40 6.2 Hookup...............................................................................................................................

Summary of the content on the page No. 6

1.0 Introduction Figure 1.0-1: The BK Precision model 4070A This manual contains operating instructions for the BK Precision Model 4070A Signal Generation and Processing Engine. Complete specifications for the Model 4070A are given in Chapter 9. 1 BK Precision 4070A User Manual Rev.2.2

Summary of the content on the page No. 7

1.1 Description Figure 1.1-1: 4070A front panel The Model 4070A is a versatile signal source capable of generating a variety of waveforms, including CW and wideband sweeps from D.C. to 21.5 MHz in steps of .01 Hz. The signals are generated using direct digital waveform synthesis (DDS) techniques for high accuracy and precision. AM, FM, PM, and FSK modulation types are available. A high speed Digital Signal Processor (DSP) controls every aspect of the DDS system and is used internal

Summary of the content on the page No. 8

Included with the Arbitrary Waveform Generator is a full featured Function Generator and Pulse Generator. The function generator offers a set of pre-stored waveforms, which are generated using the Arbitrary Waveform system. The Pulse Generator allows the user to generate pulse waveforms with varying amplitude, offset, frequency and duty cycle. 1.2 Feature summary · Each unit is individually calibrated to ensure accurate output frequency, level, and offset voltage. · Output level: 4

Summary of the content on the page No. 9

2.0 Installation and setup. This section discusses how to properly connect the 4070A to your equipment. The following diagrams identify the connectors and show typical hookups. Figure 2.0-1: Front Panel Connectors 1. SYNC out connector This connector provides a TTL/CMOS signal, +5V logic level useful for driving digital circuitry. This output is capable of driving TTL or CMOS loads with current capability +/- 24 mA. In all sinewave and modulation modes except sweep,

Summary of the content on the page No. 10

3. External Modulation In connector The External Modulation In connector, located on the rear of the 4070A, accepts an external analog signal as illustrated here: Figure 2.0-3: Connecting an external signal On this connector, the user supplies a base band signal (below 50 KHz) that is used to modulate an output carrier. (microphone is shown here as an example). It also serves as the input connector for DTMF signals in DTMF Detection mode, and signals to be measured in the Pow

Summary of the content on the page No. 11

4. External Trigger/Gating/FSK/BPSK input The External Trigger/Gating/FSK/BPSK In connector accepts an external digital signal on the rear of the unit as illustrated here: Figure 2.0-4: Driving the Ext Trigger/Gating/FSK/BPSK input On this connector the user supplies a digital signal, which serves a variety of purposes, depending on the operating mode of the 4070A. This input is a high impedance input (about 80KO) and can safely accept input levels from -10V to +10V. The i

Summary of the content on the page No. 12

Figure 2.0-5: Rear panel connectors 5. External Reference Input / Ext Arb. Clock connector This connector accepts an external sample clock for the Arbitrary Waveform Generator when the unit is in External Clock or Lock Slave modes. The signal level on this input must be between 0V and +5V and is intended to be driven by TTL/CMOS logic. (For more information on Arb Locking, refer to the chapter “Multiple Unit Locking.”) This connector is also reserved for the addition of an external

Summary of the content on the page No. 13

3.0 Operating controls and keys. 3.1 Mode key The Mode key is used to change the operating mode of the 4070A. When pressed, the LCD display is cleared and the question Mode? is displayed. The Mode key acts as a shift type key in that the meaning of each button on the front panel changes to that described by the red wording beneath it. To enter Sweep mode, for example, first press the Mode key and then press the number 4 key. You can exit the Mode scr

Summary of the content on the page No. 14

NOTE: Care must be taken when specifying an output offset voltage and level such that the output does not clip. The loaded output cannot swing higher than +6.0V or lower than -6.0V. Therefore: ¦Offset voltage¦ + 1/2 * Vp -p < 6.0 The 4070A can be used as a variable voltage source by setting the output frequency to 0.0 Hz while in Sinewave mode. Then set the offset voltage to the desired output voltage. Remember, the output impedance is 50 ohms. Up to +/- 70 mA can be drawn fro

Summary of the content on the page No. 15

3.8 Clear key While the cursor is within a numeric field, the Clear key erases all digits within the field, allowing the user to start over when entering a value. This key is also used to select the "Other" mode after the Mode key is pressed once. By selecting Other Mode, a menu of extended modes for the 4070A is presented. See the chapter on Changing Modes. 3.9 MHz/dBm, KHz/Vp-p/Sec, Hz/mVp-p/mS keys These keys are used to select the units for a numeric value once i

Summary of the content on the page No. 16

4.0 Operating guide Turn 4070A on. After a display of the hardware and software versions and serial number, the unit enters the Basic Sinewave mode of operation. The 4070A defaults to generating a 1.0 MHz sinewave at a level of +10.0 dBm. 4.1 Changing frequency To change the frequency, press the Right Field Arrow button once. The cursor will move to the frequency field. A flashing digit indicates the cursor position. You can change the frequency two different ways. You ca

Summary of the content on the page No. 17

4.5 Changing values For each operating mode, the LCD display shows a number of fields that hold operating parameters for the selected mode (i.e. sweep start frequency, stop frequency, etc.). To change the value of a parameter, you must first move the cursor to the desired field on the display. To do this, press one of the Field Arrow keys until the cursor appears in the desired field. When the cursor is advanced to a new field, it is placed in the rightmost position within that f

Summary of the content on the page No. 18

5.0 Mode descriptions The following pages describe each operating mode of the 4070A. The meaning of each parameter that appears on the LCD display is described in detail. 5.1 Basic Sinewave (CW) Mode Introduction The Basic Sinewave (CW) mode generates a sinewave of fixed frequency and level. This mode could be entered by pressing the Sinewawe One touch mode selection key NOTE: In this mode you can set the output frequency to 0 Hz and, by specifying an offset voltage, use

Summary of the content on the page No. 19

5.2 Internal AM Mode Introduction The Internal AM mode generates an amplitude-modulated signal form with fixed carrier and modulating frequencies. An internally generated sinusoid is used as a modulating signal to vary the amplitude of a carrier sinusoid. The modulation waveform is not suppressed carrier; i.e. a fixed amount of carrier power is always present in the modulated signal. . Internal AM mode could be entered by pressing “Mode”> “AM” >”1” key at any time. Internal AM Mode

Summary of the content on the page No. 20

5.3 External AM Mode Introduction External AM mode generates amplitude-modulated signal of fixed carrier frequency, were externally supplied signal is used as a modulating signal to vary signal modulated frequency and depth. Modulated frequency, output level, input gain and DC offset values could be manually entered from the front panel keypad in this mode. External signal gating options is available in this mode. External AM mode could be entered by pressing “Mode”> “AM” >”2” key at


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