B&K 4070A - Manual

BK Precision 4070A User Manual Rev.2.2 5 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 si...

BK Precision 4070A User Manual Rev.2.2 8 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 butto...

BK Precision 4070A User Manual Rev.2.2 9 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...

BK Precision 4070A User Manual Rev.2.2 10 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...

BK Precision 4070A User Manual Rev.2.2 13 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 sine...

BK Precision 4070A User Manual Rev.2.2 14 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. Th...

BK Precision 4070A User Manual Rev.2.2 15 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...

BK Precision 4070A User Manual Rev.2.2 16 5.4 Internal FM Mode Introduction Internal FM mode generates frequency-modulated signal of fixed amplitude. It used internally generated signal to modulate frequency of carrier signal. Modulated and modulating frequency, output level, deviation, and DC offse...

BK Precision 4070A User Manual Rev.2.2 17 5.5 External FM Mode Introduction External FM mode generates frequency-modulated signal of fixed amplitude were externally supplied signal is used as a modulating signal to vary frequency of the carrier signal. Modulated frequency, level, peak deviation and ...

BK Precision 4070A User Manual Rev.2.2 18 5.6 Internal PM Mode Introduction Internal PM mode generates phase-modulated signal of fixed amplitude. It used internally generated signal to modulate phase of carrier signal. Modulated and modulating frequency, output level, deviation, and DC offset values...

BK Precision 4070A User Manual Rev.2.2 19 5.7 External PM Mode Introduction External PM mode generates phase-modulated signal of fixed amplitude were externally supplied signal is used as a modulating signal to vary phase of the carrier signal. Modulated frequency, level, peak deviation and DC offse...

BK Precision 4070A User Manual Rev.2.2 20 5.8 Sweep Mode Introduction The Sweep mode continuously changes the frequency of a fixed amplitude sinusoid between a specified start frequency and stop frequency. The user can set sweep time as well. The frequency may be stepped between the start and stop f...

BK Precision 4070A User Manual Rev.2.2 22 5.9 Internal FSK Mode Introduction Internal FSK mode generates a frequency shift keyed signal of fixed amplitude. Internal timer is used as modulatin g signal to toggle the output signal frequency between mark frequency and space frequency. Mark and Space fr...

BK Precision 4070A User Manual Rev.2.2 23 5.10 External FSK Mode Introduction External FSK Frequency Shift Key generates a frequency shift keyed signal of fixed amplitude. External signal is used to toggle the output signal frequency between mark frequency and the space frequency. Mark and space fre...

BK Precision 4070A User Manual Rev.2.2 24 5.11 Burst Mode Introduction The Burst mode generates a sinusoid burst of fixed frequency and level for a specifie d duration. Both continuous and triggered bursts may be generated. In the continuous burst mode, the 4070A continuously gates the output sinuso...

BK Precision 4070A User Manual Rev.2.2 25 5.12 Internal SSB Mode Introduction Internal SSB mode generates a Single Sideband modulated signal of fixed carrier frequency. Internally generated signal is used to modulate either Upper sideband or Lower sideband of a carrier signal. Modulating, carrier fr...

BK Precision 4070A User Manual Rev.2.2 26 5.13 External SSB Mode Introduction External SSB mode generates a Single Sideband (SSB) modulated signal of fixed carrier frequency. External signal is used to modulate either Upper sideband or Lower sideband of a carrier signal. Carrier frequency, output le...

BK Precision 4070A User Manual Rev.2.2 27 5.16 DTMF Generation Mode Introduction Dual Tone Multi Frequency generation mode generates the Touch-tone dialing tones according ANSI T1.401-1988 Section 7.2 standard. The user can specify dialing digits “0” to “9” alone with ext ra DTMF codes “A” thru “D”....

BK Precision 4070A User Manual Rev.2.2 29 5.17 DTMF Detection Mode Introduction Dual Tone Multi Frequency detection mode decodes and displays the Touch-tone dialing tones according to ANSI T1.401-1988 Section 7.2 standard. Input test signal could be applied to the External Mod Input for DTMF decodin...

BK Precision 4070A User Manual Rev.2.2 30 5.18 Power & Voltage Measurement Mode Introduction The Powe r & Voltage Measurement mode measures the signal level on the Ext Mod In connector and displays the power and voltage level on the LCD display. The Power Measurement mode applies to frequenc...

BK Precision 4070A User Manual Rev.2.2 32 5.22 Internal BPSK Mode Introduction The Internal BPSK mode generates a phase shift keyed signal of fixed amplitude. An internal timer is used as a modulating signal to switch the output phase between 0 and 180 degrees at a specified rate. The modulation is ...

BK Precision 4070A User Manual Rev.2.2 33 5.23 External BPSK Mode Introduction The External BPSK mode generates a phase shift ke yed signal of fixed amplitude. The logic level on the Ext FSK In connector is used as a modulating signal to shift the output phase between 0 and 180 degrees. The modulati...

BK Precision 4070A User Manual Rev.2.2 34 5.24 Dualtone Generation Mode Introduction The Dualtone Generation mode generates an output signal, which is the sum of two sinusoids of equal amplitude. The frequency of each sinusoid may be individually specified with 1 Hz resolution. In addition, a phase ...

BK Precision 4070A User Manual Rev.2.2 36 5.25 Data Modulation Mode Introduction The data modulation mode will digitally modulate a binary message of up to 960 bits (60 words) in length. Data is digitally modulated using FSK modulation at an adjustable baud rate. The mark and space frequencies may b...

BK Precision 4070A User Manual Rev.2.2 38 NOTE: For more information on the Hexadecimal format, please refer to the User’s Manual chapter on Hexadecimal Format. Triggering the Trans mission The Data Modulation mode starts by setting the output frequency to 0 Hz and awaiting a trigger condition. When...

BK Precision 4070A User Manual Rev.2.2 39 5.26 Voltage Controlled Oscillator (VCO) Mode Introduction The Voltage Controlled Oscillator mode generates signal, where frequency could be vary between two specified values using externally supplied -5.0V/+5.0V voltage. The control input bandwidth is DC to...

BK Precision 4070A User Manual Rev.2.2 40 6.0 Remote Operation 6.1 Introduction The Remote Operation feature allows the user to control all operations of the 4070A with a terminal or computer. Commands and responses use ASCII characters; permitting a "dumb" terminal to be used to control the...

BK Precision 4070A User Manual Rev.2.2 41 You now have a terminal connection established with the 4070A. Hit the “?” key. You should see a command menu in response. If you do not see this menu, check the following: • On the 4070A, press Mode then Offset and verify that the baud rate is set to 9600. ...

BK Precision 4070A User Manual Rev.2.2 42 6.6 Remote Control Commands The diagram below gives the front panel keys and their associated ASCII codes. Sending these characters to the 4070A has the same effect as pressing the associated button on the front panel. NOTE: To familiarize yourself with the ...

BK Precision 4070A User Manual Rev.2.2 43 V - Report hardware and software versions This command reports the hardware and softwa re version. A hexadecimal serial number, and a program memory checksum are also reported by this command: BK Precision model: 4070A Software Version: c.2 Hardware Version:...

BK Precision 4070A User Manual Rev.2.2 44 F0-9 - Move cursor to field 0 to 9 This command is used to move the cursor directly to the specified field number. Each parameter field on the LCD display has an associated number with it, starting with 1 and increasing as you move from left to right, then t...

BK Precision 4070A User Manual Rev.2.2 45 6.7 Remote Control Examples The following are some examples of ASCII character command sequences: Example 1 B F1 3.141Z N 2.3Z F0 NOTE: You do not need spaces between the characters. They were added here only to make the commands more readable. This command ...

BK Precision 4070A User Manual Rev.2.2 46 7.0 Arbitrary Waveform Mode 7.1 Quick Start Guide This guide will show you how to download and generate SINE.FLT, an example waveform in floating point format. This file is on the supplied compact disk in the disc 4070A\arb\examples directory. 1 . Connect a ...

BK Precision 4070A User Manual Rev.2.2 47 7.2 Introduction to the Arbitrary Waveform System 7.2.1 Description of the Arbitrary Waveform Generator The Arbitrary Mode lets the user design custom waveforms on a PC and download them to the 4070A for generation including Arbitrary Waveform system is a fu...

BK Precision 4070A User Manual Rev.2.2 48 7.2.2 Feature Summary Arbitrary Waveform Generator: • True Arbitrary Waveform Generation. Every point is generated, regardless of clock rate • Sample rate variable from 0 to 40 Mega-samples/Second in .01 Hz steps • 32,768 maximum waveform points • 12 bit ver...

BK Precision 4070A User Manual Rev.2.2 49 7.4 Arbitrary Waveform Mode Figure 7.4-1: Arbitrary Waveform Mode display 1. Int Clock / Ext Clock / Lock M aster Lock slave mode In this field select the clocking mode for the arbitrary waveform system: Internal Clock - The sample clock is generated interna...

BK Precision 4070A User Manual Rev.2.2 50 7.5 Function Generator Mode Figure 7.5-1: Function Generator Mode display 1. Waveform In this field select the desired function generator waveform. You may select from among the following: 0. Positive Ramp 1. Negative Ramp 2. Triangle 3. Random (noise) 4. Po...

BK Precision 4070A User Manual Rev.2.2 51 7.6 Pulse Generator Mode 1. Positive Only This field, when set to “Y”, does not let the output signal go below 0V. This feature is handy when driving circuitry that cannot accept negative voltages. This feature eliminates having to readjust the offset voltag...

BK Precision 4070A User Manual Rev.2.2 52 7.7 Downloading arbitrary waveforms To download Arbitrary Waveform data to the 4070A, you must connect the serial port on your computer to the RS-232 port on the back of the 4070A. For more detail information on this, refer to the chapter 6.2 . On the host c...

BK Precision 4070A User Manual Rev.2.2 54 7.8 Data Formats 7.8.1 Floating Point Format A flo ating point number consists of a mantissa and an optional exponent. Downloading floating point values is slower because it can take many characters to represent a single numeric value. This format has an adv...

BK Precision 4070A User Manual Rev.2.2 55 7.8.2 Time & Value Floating Point Format This format uses the same numerical format as Floating Point except that a Time, or Point Number value precedes each Point Value. Since the 4070A does not need the Time or Point Number, specifying this format caus...

BK Precision 4070A User Manual Rev.2.2 58 7.8.5 Hexadecimal Format This format sends the same two's complement data that Binary format uses, except that each nibble (4 bits) of the hex value is represented by an ASCII character. Each data point is a 16-bit valu e, which is sent to the 4070A as 4 ASC...

BK Precision 4070A User Manual Rev.2.2 59 7.8.6 Binary Format This is the fastest way to send points to the 4070A since it transfers the data point with only 2 characters. (It is also the least forgiving as far as getting the data sent correctly). Each data point is a 16-bit word, which is sent to t...

BK Precision 4070A User Manual Rev.2.2 60 7.9 Multiple Units Locking 7.9.1 Introduction to Multiple Arb Locking With this feature, users may lock several arbitrary waveform generators together to generate multiple simultaneous signals, which are locked together in frequency. The user may then adjust...

BK Precision 4070A User Manual Rev.2.2 61 More on Phase Offsets Phase Offsets are accomplished with a reset signal shared by all units. This signal tells all units to jump to a particular waveform point at the same time. By changing which point in the waveform is jumped to, the starting phase of the...

BK Precision 4070A User Manual Rev.2.2 62 7.10 Example Arb Program ARB.BAS ARB.BAS is a program written in Microsoft Quick Basic, which calculates the points of a sinewave and downloads them to the 4070A as an arbitrary waveform. The program can generate the waveform in all of the supported formats ...

BK Precision 4070A User Manual Rev.2.2 64 '****************************************************************************** ' Subroutines ' ' These subroutines take a value in PointVal (which ranges from -1.0 to +1.0) ' and converts it to various data formats, (i.e. Floating Point, Binary, ' ASCII Hex...

BK Precision 4070A User Manual Rev.2.2 69 8.0 DC Operation Option Description The DC Operation Option allows the user to power the 4070A from a DC voltage source in the 9-36 VDC range. The user may easily switch between the AC Line supply and a DC source. This option is most useful for service and r...

BK Precision 4070A User Manual Rev.2.2 70 Main Output Frequency: DC to 21.5 MHz, .01 Hz steps Level: 4 mVp -p to 10.000 Vp -p, 1 mV steps (into 50 Ω ) or -44.0 dBm to +24.0 dBm, .1 dBm steps (into 50 Ω ) Level Accuracy: ± 1% Flatness: ± . 2 dB (DC-10 MHz), +0.4dB (10MHz – 21.5MHz) @5vpp (into 50 Ω )...

BK Precision 4070A User Manual Rev.2.2 72 Appendix A Example remote control host program This chapter contains an example program written in Microsoft QuickBasic for remotely controlling the 4070A. It can be used as a starting point for writing your own remote control applications. The program illus...

BK Precision 4070A User Manual Rev.2.2 77 Appendix B Television Remote Control Example This chapter contains an example program written in Microsoft QuickBasic for controlling the 4070A remotely. It is used here to drive an infrared LED to issue commands to a TV or a VCR. It uses the 4070A in Burst ...

BK Precision 4070A User Manual Rev.2.2 81 Limited Two-Year Warranty B&K Precision Corp. warrants to the original purchaser that its product and the component parts thereof, will be free from defects in workmanship and materials for a period of two years from the data of purchase. B&K Precisi...

BK Precision 4070A User Manual Rev.2.2 82 Service Informatio n Warranty Service: Please return the product in the original packaging with proof of purchase to the below address. Clearly state in writing the performance problem and return any leads, connectors and accessories that you are using with ...