BK Precision BK Precision 4033 Manual

Model: 4033, 4034

50 MHz Programmable Pulse

USER MANUAL

99 Washington Street Melrose, MA 02176

Phone 781-665-1400 Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

Generator

135

93 MTA29

175

125 } MSA29,PPD

136

94 ^ MTA30

176

126 ~ MSA30,PPD

137

95 _ UNT

177

127

DEL

Message Definitions

PPE

Parallel Poll Enable

SPE

Serial Poll Enable

PPU

Parallel Poll Unconfigure

TCT

Take Control

SDC

Selected Device Clear

UNL

Unlisten

SPD

Serial Poll Disable

UNT

Untalk

4.16 RS-232 Pr o g ramming

4.16.1 General

The INSTALLATION se ction of this manual describes the RS-232-C con nection for the instru ment. Be sure that you have the Remote Mode set to RS-232 and correctly set the baud rate.

EIA standard RS-232-C specifies the electrical characteristics and pin out of a serial communication standard for connecting "data terminal equipment" (DTE) to "data communication equipment" (DCE). Data terminal equipment is usually devices such as terminals, computers, or printers that are the final destination for data. Data communication equipment, on the other hand, is usually a modem or other device that converts the data to another form and passes it through. The instrument can be configured only as a DCE, so in most cases it can be connected with a strai ght-through cable to a computer, but would require special cabling to connect to another DCE device.

The baud rate is the bit rate during the transmission of a word in bits per second. Different devices use many baud rates, but the baud rates of the two devices that are connected must be the same. The instrument can be set to different baud rates ranging from 1200 to 115,000 as described in Section 3, Operating Instructions.

Data signals over the RS-232-C use a voltage of +3V to +25V to represent a zero (called a space) and a voltage of

-3V to -25V to represent a one (called a mark). Handshake and control lines use +3V to +25V to indicate a true condition and -3V to -25V to indicate a false condition. When no data is being transmitted , the idle state of the data lines will be the mark state. To transmit a byte, the transmitting device first sends a start bit to synchronize the receiver .

4.16.2 RS-232-C Operation

The RS-232-C standard is not ve ry specific about many of the handshaking si gnals and it i s therefore usually necessary to refer to the manuals for both of the devices being connected to determine the exact pin out, signal definition, and signal direction for the devices.

The serial interface implements the same SCPI command set as the GPIB interface. The instrument is programmed by sending ASCII coded characters to the instrument. When the instrument is in the remote mode remote command input has priority over any front panel control. Therefore, as long as the serial interface is continuously supplied with data, the keyboard will appear to be inoperative to the user.

Before connecting the line cord to the AC mains, check the rear panel AC line

line voltage other than the indicated voltage can

destroy the AC line fuses. For continued fire protection, replace fuses only with

static discharge

(ESD). To avoid damage, be sure to follow proper procedures for handling, storing

sensitive

This product is subject to Directive 2002/96/EC of the

Electrical Shock hazard.

CAUTION:

voltage indicator. Applying a

CAUTION:

those of the specified voltage and current ratings.

This product uses components which can be damaged by electroand transporting parts and subassemblies which contain ESD-

components.

Compliance Statements

Disposal of Old Electrical & Electronic Equipment (Applicable in the European Union and other European countries with separate collection systems)

European Parliament and the Council of the European Union on waste electrical and electronic equipment (WEEE) , and in jurisdictions adopting that Directive, is marked as being put on the market after August 13, 2005, and should not be disposed of as unsorted municipal waste. Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements.

Safety Symbols

Connect to safety earth ground using the wire recommended in the user manual.

This symbol on an instrument indicates that the user should refer to the operating instructions located in the manual.

Table of Contents

Safety Summary .............................................................................................. 2

Section 1 .......................................................................................................... 6

Introduction ........................................................................................................................ 6

1.1 Introduction .............................................................................................................................................. 6

1.2 Description ............................................................................................................................................... 6

1.3 Safety Remarks ....................................................................................................................................... 6

1.4 Package Contents ................................................................................................................................... 6

Specifications ..................................................................................................................... 6

Section 2 .......................................................................................................... 9

Installation .......................................................................................................................... 9

2.1 Introduction .............................................................................................................................................. 9

2.2 Mechanical Inspection ............................................................................................................................. 9

2.3 Initial Inspection ....................................................................................................................................... 9

2.4 Instrument Mounting ................................................................................................................................ 9

2.5 Product Dimensions ................................................................................................................................ 9

2.6 Power Requirements ............................................................................................................................. 10

2.7 Grounding Requirements ...................................................................................................................... 10

2.8 Signal Connections ................................................................................................................................ 10

2.9 RS-232 Connection ............................................................................................................................... 13

2.10 RS-232 Configuration .......................................................................................................................... 14

2.11 GPIB Address ...................................................................................................................................... 14

2.12 GPIB Connections ............................................................................................................................... 14

Section 3 ........................................................................................................ 15

Operating Instructions .................................................................................................... 15

3.1 General Description ............................................................................................................................... 15

3.2 Display Window ..................................................................................................................................... 16

3.3 Front Panel Controls .............................................................................................................................. 17

3.4 Back Panel Controls .............................................................................................................................. 17

3.5 Output connectors ................................................................................................................................. 19

3.6 MENU Keys ........................................................................................................................................... 19

3.7 ON Key .................................................................................................................................................. 29

3.8 Cursor Movement Keys ......................................................................................................................... 29

3.9 Rotary Input Knob .................................................................................................................................. 29

3.10 Power-On Settings .............................................................................................................................. 29

3.11 Memory ................................................................................................................................................ 30

3.12 Displaying Errors ................................................................................................................................. 30

3.13 Pulse Definitions .................................................................................................................................. 31

3.14 Pulse Parameter Limitations ................................................................................................................ 32

3.15 Pulse Definitions .................................................................................................................................. 33

Section 4 ........................................................................................................ 35

Programming .................................................................................................................... 35

4.1 Overview ................................................................................................................................................ 35

4.2 Device State .......................................................................................................................................... 36

4.3 Interface Function Subsets .................................................................................................................... 37

4.4 Device Address...................................................................................................................................... 37

4.5 Message Exchange Protocol ................................................................................................................. 37

4.6 Instrument Identification ........................................................................................................................ 38

4.7 Instrument Reset ................................................................................................................................... 38

4.8 Self Test ................................................................................................................................................. 38

4.9 Command Syntax .................................................................................................................................. 39

4.10 Status Reporting .................................................................................................................................. 41

4.11 IEEE 488.2 Common Commands and Queries ................................................................................... 45

4.12 Instrument Control Commands ............................................................................................................ 48

4.13 IEEE 488.1 Interface Messages .......................................................................................................... 64

4.14 SCPI Command Tree .......................................................................................................................... 65

4.15 ASCII and GPIB Code Chart ............................................................................................................... 67

4.16 RS-232 Programm ing .......................................................................................................................... 69

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX 781.665.0780 - TestEquipmentDepot.com

Section 1

MODELS

4033

4034

CHANNELS

FREQUENCY

0.1 Hz to 50 MHz

TIMING CHARA CTERISTICS

PERIOD

Range (single pulse)

20 ns to 10 s (50 MHz to 0.1 Hz repetition rate)

Range (double

40 ns to 10 s (25 MHz to 0.1 Hz repetition rate)

Introduction

1.1 Introduction

This manual contains information required to operate, program, check, and maintain the 50 MHz programmable pulse generator.

1.2 Description

The Model 4033 and 4034 are a high performance programmable pulse generators. The instrument generates pul s e with a repe tition rate to 50 MHz, width from 10 n s, var ia ble delay, variable transitio n times and amplitude. The pulses can be output in continuous, trigge red, gated , or burst mode with an int ernal or external trigger signal.

The model 4033 and 4034 can be remotely operated via RS232 or GPIB interface bus and is SCPI compatible.

1.3 Safety Remarks

The model 4033 and 4034 are SAFETY CLASS 1 instruments. Before operation, review the safety summary at the beginning of the manual.

1.4 Package Contents

The following list of items and accessories come in the package:

1. 4033 or 4034 Pulse Generator

2. AC power cord

3. CD containing use r man ual

4. Test report and certificate of calibration

5. RS-232 Serial Cable

Specifications

NOTE

Specifications listed in manual are ap plicable after a powered 30 minute warm-up into a 50 Ω load

All timing characteristics are measured at 50% of amplitude with fastest edge Specifications are verified according to the performance check procedures. Specifications not verified in the manual are either explanatory notes or general performance characteristics only. Specifications and information is subject to change without notice. For the most current and correct data please visit www.bkprecision.com

pulse)

Resolution

Up to 6 digits, limited to 10 ps

Accuracy

± 0.01 %

Jitter

< 0.01 % of setting +20 ps on Period, Width and Delay

WIDTH

Range

10 ns to (Period – 10 ns)

Resolution

Up to 6 digits, limited to 100 ps

Accuracy

(0.5% of setting +500 ps)

Double Puls e

(0.5% of setting +3 ns) for the second pulse

DELAY

Range

0ns to (Period – Width – 10 ns)

Resolution

Up to 6 digits, limited to 100 ps

Accuracy

±(0.5% of setting +500 ps)

DUTY

CYCLE

Range

1 to 99%

Resolution

3 digits (0.1%)

Accuracy

Limited by width and pulse accuracy

OUTPUT CHARACTERISTICS

AMPLITUDE

High Level

-9.90 V to +10 V into 50 ohms load (-19.80 V to +20 V into open circuit)

Low Level Range

-10 V to +9.90 V into 50 ohms load (-20 V to +19.80 V into open circuit) Amplitude R ange

0.1V to 10V p-p into 50 ohms load (20 Vp-p max into open circuit)

Resolution

3 digits limited to 10 mV

Accuracy

1% of setting ± 10 mV into 50 ohms

Aberrations

<5% + 20 mV into 50 ohms load, for pulse levels between ±5 V

Output Resistance

50 ohms Offset Accuracy

1% ± 25 mV

OPERATING MODES

Continuous

Output continuous at programmed period rate

Output quiescent until triggered by an internal, external, GPIB or manual

Same as triggered mode except pulses are output for the duration of the gated signal. The last cycle started is completed

Same as triggered mode for programmed number of cycles from 2 to

External Width

Trigger duration and rate sets pulse width and repetition

PULSE FUNCTIONS

Single

One pulse at each selected period up to 50 MHz repetition rate

delay control.

TRANSITION T IMES

<6 ns to 10 ms variable. Leading and trailing edges settable separately and

Resolution

3 digits limited to 10 ps

Accuracy

(5% of setting +2ns)

<5% deviation from a straight line between 10% and 90% points, for transitions > 50 ns

INTERNAL TRIGGER

Range

100 ns to 100 s

Resolution

4 digits limited to 100 ns

INPUT AND OUTPUT

± ±

Range

Triggered

Gated

Burst

Double

Range

Linearity

trigger, then generates one cycle at programmed period rate

999,999 as set by the N-BURST function

One pair of pulses at each period up to 25 MHz repetition rate. Both pulses have the same selected width; the position of the second pulse set b y the

limited to 20:1 ratio between settin gs into one of the following ranges: 5ns100 ns; 50 ns-1.0 us; 500 ns-10 us; 5.0 us-100 us; 50 us-1.0 ms; 500 us-10 ms, 5 ms – 100 ms

Accuracy

± 0.01%

TRIGGER

INPUT

Sensitivity

200 mVp-p minimum

Minimum Wi dth

10 ns

Maximum Rate

50 MHz

Input Imped ance

10 kΩ

Input Protection

+15V DC plus peak AC

Range

Selectable from -10 V to +10 V

Resolution

3 digits limited to 10 mV

Slope Selection

Positive or Negative

SYNC OUTPUT

level is >2 V into 50 ohms and with 3.5 ns typical transition times.

GPIB PROGRAMMING

Interface

GPIB and RS -232, IEEE-488.2 and SCPI compatible

GPIB Functi on Codes

SH1, AH1, T6, L4, SR1, RL1, PP0, DC1,DT1, C0, E2

GENERAL

Non volatile, stores up to 99 complete panel settings. Last user setup a lso

Dimensions WxHxD

8.4 x 11.8 x 3.5 inches (213 x 300 x 88 mm)

Net Weight

Approx. 3 kg

EMC

Conforms to EN55011 class B for radiated and conducted emissions

Electrical Discharge Immunit y

Conforms to EN55082

Safety Specifications

Conforms to EN61010, CE Approved

Operating Temperature

32 °F to 122 ° F (0 °C to 50 °C)

Storage Temperature

-4 ° F to 140 °F (-20 °C to 60 °C)

Humidity

90% RH at 32 °F to 86 °F (0 °C to 30 °C)

A TTL level pulse at the programmed period. Output impedance is 50 Ω, protected against short circuit a nd up to ±15 V accidental input. The high

Memory

Power Requi rements

retained at power down 100-240 V, ±10%, 48-66 Hz, 50 VA ma ximum

Section 2

300 mm

213 mm

88 mm

Installation

2.1 Introduction

This section contains installatio n information, power requirements, initial inspection and signal connections for

Model 4033 and 4034.

2.2 Mechanical Inspection

This instrument was carefully inspected before shipment. Upon receipt inspect the in str ument for damage that might have occurred in transit. If there is d a mage d ue to shipping, file a claim with the car rier who transported the unit. The shipping and packing mater ia l should be saved if reshipment is required. If the original container is not to be used, then use a heavy carton box. Wrap the unit with plastic and place cardboard strips across the face for protection. Use packing material around all sides of the container and seal it with tape bands. Mark the box "FRAGILE".

2.3 Initial Inspection

After the mechanical inspection, verify the contents of the shipment (accessories). If the contents are incomplete, or

if the instrument does not pass the specification acceptance tests, notify the local service center. The unit is calibrated and ready for use upon receipt. For a detailed performance check procedure, please see section 5 of the manual.

2.4 Instrument Mounting

The model 4033 and 4034 programmable pulse generators are intended for bench use . The instrument includes a

front feet tilt mechanism for optimum panel viewin g angle. The instrume nt does not re quire special cooling when operated within conventional temperature limits. The unit can be installed in a closed rack or test station if proper air flow is assured. A 5 cm minimum clearance must be provided at the rear of the unit for proper convection cooling.

2.5 Product Dimensions

2.6 Power Requirements

The model 4033 and 4034 can be operated from any source of 100-240V +/-10% AC, at a frequency from 48Hz to 66Hz. The maximum power consumption is 50 VA.

WARNING

THE LINE POWER VOLTAGE OF THE INSTRUMENT IS NOTED ON THE AC INPUT PLUG. TO PREVENT DAMAGE TO THE INSTRUMENT, CHECK FOR PROPER MATCH OF LINE VOLTAGE AND PROPER FUSE TYPE AND RATING.

The instrument power fuse is loc a te d in the AC input plug. To access the fuse, firs t disconnect the power cord and

then remove the fuse cartridge. Use T1A 250V fuse only, as labeled in the rear panel of the unit.

2.7 Grounding Requirement s

For the safe ty of operating personnel, the instrument mus t be grounded. The central pin on the AC plug grounds the

instrument when properly connected to the ground wire and plugged into proper receptacle. The power jack and the mating plug of the supplied power cable meet IEC safety standards.

WARNING

TO AVOID PERSONAL INJURY DUE TO SHOCK, THE THIRD WIRE EARTH GROUND MUST BE

CONTINUOUS TO THE POWER OUTLET. BEFORE CONNECTION TO THE POWER OUTLET, EXAMINE ALL CABLES AND CONNECTIONS BETWEEN THE UNIT AND THE FACILITY POWER FOR A CONTINUOUS EARTH GROUND PATH.

THE POWER CABLE MUST MEET IEC SAFETY STANDARDS.

2.8 Signal Connections

Use RG58U 50 Ω or equivale nt coaxial cables for all input and o utput signals to and from the instrume nt. Below specifies the BNC connectors on the instrument:

OUTPUT – Up to 10 Vpp into 50 Ω impedance (20 Vpp into open circuit). The instrument is protected from short circuit to ground.

TRIG IN – 10 kΩ impedance, selectable positive or negative slope, variable level from – 10 V to + 10 V. Input protected to ±15 V.

SYNC OUT – A positive pulse signal in phase with the main output. TTL levels with a 50 Ω source impedance and with 3.5 ns typical transition times.

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

FAX 781.665.0780 - TestEquipmentDepot.com

2.8.1 Maintaining Pulse Fidelity

( ) R Z R

R Z R

Z 1 2

1 2 2

R Z R

Z R

1 1 2

1 2

Due to the extremely fast pulse rise times obtained from the instrument, special consideration must be given to preserve pulse fidelity. Even at low repetit i on rates, high frequency compo nents are present in the output waveform. Use high quality coaxial cables, attenuators and terminations.

Note: RG 58 type coaxial cable and typical BNC connectors exhibit impedance tolerances which may cause visible reflections. For maximum fidelity, use short, high quality, 50 Ω coaxial cables.

When signal comparison measurements or time difference determinations are made, the two signals from the test device should travel through coaxial cables with identical loss and time delay characteristics.

When making connections that are not in a 50 Ω e nviro nment, keep all lead lengths short, 1/4 inch or less.

2.8.2 Impedance Matching

A mismatch, or different impedance in a transmission line, generates a reflection back along the line to the source. The amplitude and polarity of the reflection are determined by the load impedance in relation to the characteristic impedance of the cable. If the load impedance is higher than the characteristic impedance of the line, the reflection will be of the same polarity as the applie d signal. If it is lower, the reflection will be of opposite polarity. These reflections add or subtract from the amplitude of the incident pulse causing distortion and irregular pulse shapes.

Impedance-matching net wor k tha t pr o vid es mi ni mu m att e nu at io n

A simple resistive minimum attenuation impedance matching network that can be used to match the instrument output into relatively l ow impedance is shown in the abo ve figure. T o match impedance with t he illustra ted network, the following conditions must e xist :

and

Therefore:

R Z Z Z1 2 2 1= −( )

R Z

Z Z

2 1

−

R1 125 125 50 968= − =( ) .

R2 50

125

125 50

64 6=

−

= .

EER

1 2

1= = +

ERRRZ

2 1

1 2

1 1

1= = + +

968

125

1 177= + =..

968 64 6

968

1 4 43= + + =

. .

R1 R2 = Z1 Z2, and R1 Z1 = R2 (Z2-Z1)

and

For example: to match a 50Ω system to a 125Ω system, Z1 equals 50Ω and Z2 equals 125Ω

Therefore:

Ω

and

Ω

Although the illustrat ed network provides minimum attenuation, for a purely resistive impedance-matching device, the attenuation as seen from one end does not eq ual that seen from the other end. A signal (E1) applied from the lower impedance source, encounters a voltage attenuation (A1) which is greater than 1 and less than 2, as follows:

A signal (E2) applied from the higher impedance source (Z2) encounters a greater voltage attenuation (A2), which is greater than 1 and less than 2 (Z2/Z1):

In the example o f matching 5 0Ω to 125Ω,

and

DB-9 pin

Name

Note

D d

138

10=

log

Rt Rt Rt Rt= + + +( ) ( ) ( ) ......

The illustrated network can be modified to provide different attenuatio n ra tios by adding another resistor (less than R1) between Z1 and the junction of R1 and R2.

When constructing suc h a device, the environment surrounding the c omponent s should also be designe d to provide smooth transition between the impedances. Acceptable performance can be obtained with discrete components using short lead lengths; however, a full coaxial environment is preferred.

The characteristic impedance of a coaxial device is determined by the ratio between the outside diameter of the inner conductor to the inside diameter of the outer conductor expressed as:

2.8.3 Rise Time Measurements in Linear Systems

Consider the rise time and fall time of associated equipment when measuring the rise time or fall time of a linear device. If the rise time of the device under test is at least ten times slower than the combined rise times of the instrument, the monitoring oscilloscope, and associated cables, the error introduced will not exceed 1%, and usually may be ignored. If the rise time or fall time of the test device is less than ten times slower than the combined rise times of the testing system, determine the actual rise time of the device under test by using the following formula:

Rt equals the overall rise time or fall time of the entire measurement system and R1, R2, R3, etc. are the rise times or fall times of the individual components in the system.

2.9 RS-232 Connection

The rear panel RS-232 connector is a standard DB-9 male connector configured as a DCE. The pin assignments are defined in the table below:

2 3 4 5 6 7 8

*Note: Use a Null-modem or cross over cable (pin 2 and 3 switched) in order to communicate with instrument.

TXD RXD

GND

RTS CRS

Transmit Data

Receive Data

Signal gro und

Request to Send

Clear to send

2.10 RS-232 Configuration

The instrument use 8 data bits, 1 stop bit, no parity and baud rate selectable from 2400 to 115K (2400, 4800, 9600, 19200, 38400, 57600, 115200). By default, the instrument is set at 19200-8-N-1.

Note: If 115K baudrate speed is used, ensure that the RS232 cable is short and can support this speed. Otherwise,

there may be some instability and intermittent data transmission failure between the interfacing comp uter and the instrument.

2.11 GPIB Address

The address can be changed from the front panel by using the "UTILITY" menu.

2.12 GPIB Connections

The rear panel GPIB connector is an AMPHENOL 57-10240 or equivalent, and connects to a standard IEEE-488

bus cable connector. The GPIB line screens are not isolated from chassis and signal ground.

1 2 3 7 8

3.1 General Descripti on

This section describes the displays, controls and connectors of the Model 4033 and 4034 - Function Generators. All controls for the instrument local operation are located on the front panel. The connectors are located on both

front and rear panels.

Section 3

Operating Instructions

(Model 4034 only)

(Model 4033)

Figure 3.1 - Front Panel View

1. Power ON-OFF - Applies and removes AC power to the unit

2. Display Window - Displays all instrument data and settings on a LCD.

3. FI-F5 Keys - Select the menu options that appear on the bottom section of the LCD display.

4. Menu Keys - Select menu options for waveform parameters (PARAM), output levels

(OUTPUT), pulse edges (PULSE), tr igge ri ng mo d es (MODE), setup

configurations (SETUP), and utility options (UTIL).

1 2 3 4 5 6 7

5. Numerical Keypad - Numeric entry keys for entering values for various functions and modes

6. Unit Setting Keys - Quick keys fo r setting units for fr equency, time, and ampl itude

7. Rotary Knob - Used to increment/decrement numerical values or to scan through the possible

selections.

8. Cursor Keys - Used to move the cursor (when visible) to e ither le ft or right when modi fying

values of various parameters.

9. Output ON - Controls the main output signal. In model 4033, the output status is ON when

display shows “Out On” and the button lights up. In Model 4034, display will show “On” next to “ch1” and/or “ch2” indicato rs dependi ng on which channel is selected to be on.

10. Channel Output - (model 4034) Dual BNC independent channel outputs (50 Ω) of pulse signal.

11. Output ON - (model 4033) Controls the main out put signa l . The output status is ON when

illuminated.

12. Channel Output - (model 4033) BNC channel output (50 Ω).

13. Sync Out - (model 4033) Sync out put, 50 Ω 5V TTL level. Sync out for dual channel model

4034 is located in the rear panel of the instrument.

14. CHAN Key - (model 4034 only) Cha nnel select key

15. MAN TRIG Key - Sends manual trigger pulse when p ushed (requires instrument to be in manual

trigger mode)

16. ENTER Key - Used for confirming parameter adjustments and settings.

3.2 Display Window

The pulse generator has a graphical LCD display that c a n d isplay up to 160 x 80 dots. When you power-on the unit a

parameter (Frequency) and its current settings appear in the display

function, parameter or mode display selected.

. The bottom displays a menu that corresponds to the

Figure 3.2 - LCD Display Screen

1. Channel/Output Display

Displays the current se lected channel (when highlighted). (For model 4034 only). Also displays highlighted text “Out On” when output is ON (For model 4033) or displays a highlighted text “On” next to “Ch 1” and/or “Ch 2” when either or both channel outputs are ON (For model 4034).

2. General Waveform Display

Displays the general waveform be i ng generate d in the cha nnel.

Note: Waveform shown is approximated and scaled down. It does not show the exact representation of the waveform at the output.

3. DEL Mode Display

Displays delay setting of the pulse. Alternatively, it can also display other parameters in other menu items.

4. Menu Functions Display

Displays the menu options available. Use F1-F5 keys on front panel to select the options.

5. Secondary Parameter Display

Displays the values of parameters selected in the menu. Depending on the opti ons chosen, va rious para meters will displa y with a cursor for adjusting their values. For example, width or duty cycle can be displayed.

6. Main Parameter Display

Displays the main parameter value . When highlighted, it can be adjusted with numeric keypad or rotary knob. It can, for example, adjust frequency or period.

7. Mode Display

Displays the current mode of the generator . This can be the trigger mode of the power supply.

3.3 Front Panel Controls

The front-panel controls select, display, and change parameter, function, and mode settings. Use the rotary input knob and the cursor moveme nt keys to ent er data into the pulse generator.

To change a setting:

1. Press the key that leads to a required item.

2. Move cursor using cursor keys to the appropriate position in the numeric field.

3. Use the rotary input or the numerical keyboard to change the value of the displayed item. Changes take effect immediately.

The following subsections describe the function of each front panel key and connector.

3.4 Back Panel Controls

The pulse generator has 4 BNC Connectors on the rear panel where you can connect coaxial cables. These coaxial connectors are labeled accordingly and serve as carrier lines for input and output signals delivered to and from the pulse generator.

Model 4034

11 3 8

10 9 5

Model 4033

1 3 4 5 6

Figure 3.3 - Back Panel View

1. Options 50 Ω - Reserved for future use.

2. Options TTL - Reserved for future use.

3. Trig In - Use this connector to appl y an external trigger or gate signa l, dependi ng on the waveform

generator setting, to the generator. Maximum input is ± 15 V.

4. CTRL IN - Not used

5. GPIB Interface - Use to interface with a computer via GPIB for remote communication.

6. RS-232 Interface - This is a standa rd RS-232 port used for remote interface. Null modem or cross

serial cable is required to communicate with a PC via this port.

7. Ea rth GND - This screw is the earth ground that is tied to the chassis.

8. AC Power Co nnector - Used to connect power cable to AC line source.

9. Fuse Box - Fuse compartment. For replacement, use T1A, 250V fuse only.

10. Cooling Fan - To ensure proper cooling, please leave room between the fan output and other objects

with at least one feet distance.

11. SYNC OUT - (Model 4034 only). 50 Ω TTL sync output for channel 1.

12. TRI G IN an d SYNC OUT - (Model 4034 only). TRIG IN and SYNC OUT BNC connectors for

channel 2. SYNC OUT is a 50 Ω TTL level signal. TRIG IN accepts maximum ± 15 V.

3.5 Output connectors

The pulse generator output circuits operate as a 50 Ω voltage source working into a 50 Ω load. At higher frequenci es, un-terminated or improperly terminated output cause aberrations on the output waveform. In addition, loads less than

50 Ω reduce the waveform amplitude, while loads more than 50 Ω increase waveform amplitude. Excessive distortion or aberrations caused by improper termination are less noticeable at lower frequencies. To ensure pulse integri ty, follow these precautions:

1. Use good quality 50 Ω coaxial cable and connectors.

2. Make all connections tight and as short as possible.

3. Use good quality attenuators if it is necessary to red uce pulse amplitudes applied to sensitive circuits.

4. Use termination or impedance-matching devices to avoid reflections.

5. Ensure that attenuators and terminations have adequate power handling capabilities. If there is a DC voltage across the output load, use a coupling capacitor in series with the load. The time constant of the coupli ng capacitor and load must be long e nough to maintain pulse flatness.

Impedance Matching

If the wave form generat or is driving a high impedance, such as the 1 MΩ input impedance (paralleled by a stated capacitance) of an oscilloscope vertical input, connect the transmission line to a 50 Ω attenuator, a 50 Ω termination and to the oscilloscope input. The attenuator isolates the input capacitance of the device and terminates the waveform generator properly.

3.6 MENU Keys

These keys select the main menus for displaying or changing a parameter, function or mode. Below is the hierarchy and selections of the menu tree.

MENU TREE

- PARAM

o PERIOD | FREQ o WIDTH | DUTY o DELAY o I NDEP | CH1 (When CH2 is selected only) o SINGLE | DOUBLE

- OUTPUT

o HILVL o LOLVL o PREDEF

 ECL

 TTL  CMOS  USER

o OUTPUT LIMITS

- PULSE

o RISE o FALL o EQUAL o NO RM | COM P L

- MODE

o CONT o TRIG

o GATE

o BURST

o EXTWID

- SETUPS

o RECALL o STORE o CLEAR ALL

- UTIL

o GPIB (ACTIVE) (GPIB Address ) o RS232 (ACTIVE) (Baudrate) o INTEN o POWER (Power On Setup)

 HIPRED | LOPRED  LIM OF

 LIM ON  HILIM  LOLIM  PREV

 MAN (Manual Trigger)  INT (Inter nal Trigger Rate)  EXT (External Trigger)  PREV

 MAN (Manual Gate Trigger)  INT (Inter nal Gate Trigger Rate)  EXT (External Gate Trigger)  PREV

 MAN (Manual Burst )  INT (Internal Burst Rate)  EXT (Burst External)  NBRST (Number of Burst s )  PREV

3.6.1 PARAMETER Menu

This key selects and displays the waveform frequency, amplitude, offset and external reference and allows changin g th e parameter data.

Frequency Menu

F1: PERIOD/FREQ - Selects and displays the period or the pulse frequency. Change the values using the

cursor keys, rotary knob or numerical keys. If a certain setting can't produce the waveform at the desired parameters, the generator displays an error message. While the

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pulse mode is set to external width on, the value of the period may be changed but the value is not displayed, since the actual value of the period is set by the external pulse

F2: WIDTH/DUTY - Selects and displays the pulse width and duty cycle. The minimu m va l ue of the wid th

is 10ns, with the maximum value dependent on the values of the period, delay and transition times. The Duty Cycle is defined as the ratio of the p ulse width to the pulse period. C hanging the duty cycle will therefo re change t he width accordingly. The duty cycle has both a value and a state (on or off). On Power On the duty cycle is off. This means that the width is determined by the width parameter only. The duty cycle is set to ON by entering a value. The value may then be changed usi ng the rotary encoder o r the numeric keys. When the duty cycle is on, cha nging the period will cause a change in the width such t hat the duty cycle is kept constant. The duty cycle is set to OFF by changing the width val ue. The instrument will store the last value o f t he duty cycl e, and set the duty cycle to this value when it is next set to ON. The duty cycle has an absolu t e range of 1 % to 99 %, but the actual value is limited by the values of the period, delay and transition times.

F3: DELAY - This parameter is used in two instances. The first is to set the delay of the pulse in the

single pulse mode. The delay governs the time from the SYNC signal to the start of the pulse. The second instance is the double pulse mode. Here the delay governs the time from the SYNC pulse to t he beginning of the second pulse. The minimu m and maximum values of the delay are dependent on the values of the period, width and leading and trailing edge times. The delay range is 0 to 9.80000 s.

Delay Menu

F4: INDEP/CH1 - When channel 2 is selected using the CHAN button, this menu option will appear. By

default, it is selected in INDEP, which makes channel 2 a n independ ent channel. If CH1 is selected, channel 2 and channel 1 will have matching clock and trigger. The period and frequency will also be the same as channel 1. In this mode, all triggering options will not be available in the MODE menu, as it will be depende nt on chan nel 1 settings. Frequency and Period adjust options will also be disabled. Aside from these, all other parameters are still adjustable.

F5: SINGLE/DOUBLE - The unit can be set to generate either a SINGLE pulse or a DOUBLE pulse. In the

double pulse mode, the first pulse is generated without delay from the start and the second pulse in generated after a delay, from the start of the period, as determined by the DELAY parameter. Thus, in order to generate a double pulse, the delay must first be set, and then the double pulse may be set on. The double pulse mode state is to ggled using the F5 ke y. The minimu m and maxi mu m values of the d el ay ar e dependent on the values of the period, width, delay and transition parameters.

+ 48 hidden pages

BK Precision BK Precision 4033 Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Section 1

Introduction

1.1 Introduction

1.2 Description

1.3 Safety Remarks

1.4 Package Contents

Specifications

NOTE

Section 2

Installation

2.1 Introduction

2.2 Mechanical Inspection

2.3 Initial Inspection

2.4 Instrument Mounting

2.5 Product Dimensions

2.6 Power Requirements

2.7 Grounding Requirement s

2.8 Signal Connections

2.8.1 Maintaining Pulse Fidelity

2.8.2 Impedance Matching

2.8.3 Rise Time Measurements in Linear Systems

2.9 RS-232 Connection

2.10 RS-232 Configuration

2.11 GPIB Address

2.12 GPIB Connections

3.1 General Descripti on

Section 3

Operating Instructions

3.2 Display Window

3.3 Front Panel Controls

3.4 Back Panel Controls

3.5 Output connectors

3.6 MENU Keys

3.6.1 PARAMETER Menu