B+K precision 4084AWG User manual

Function and Arbitrary/Function Generators
Model 4084AWG, 4086AWG, 4084, 4085, 4086, 4087
INSTRUCTION
MANUAL
4080 Series

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Safety Summary
The following safety precautions apply to both operating and maintenance personnel and must be
observed during all phases of operation, service, and repair of this instrument. Before applying power,
follow the installation instructions and become familiar with the operating instructions for this
instrument.
Failure to comply with these precautions or with specific warnings elsewhere in this manual violates
safety standards of design, manufacture, and intended use of the instrument. B&K Precision Corporation
assumes no liability for a customer’s failure to comply with these requirements. This is a Safety Class I
instrument.
GROUND THE INSTRUMENT
To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical ground.
This instrument is grounded through the ground conductor of the supplied, three-conductor ac power
cable. The power cable must be plugged into an approved three-conductor electrical outlet. Do not alter
the ground connection. Without the protective ground connection, all accessible conductive parts
(including control knobs) can render an electric shock. The power jack and mating plug of the power
cable meet IEC safety standards.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes. Operation of any electrical
instrument in such an environment constitutes a definite safety hazard.
KEEP AWAY FROM LIVE CIRCUITS
Instrument covers must not be removed by operating personnel. Component replacement and internal
adjustments must be made by qualified maintenance personnel. Disconnect the power cord before
removing the instrument covers and replacing components. Under certain conditions, even with the
power cable removed, dangerous voltages may exist. To avoid injuries, always disconnect power and
discharge circuits before touching them.
WARNINGS AND CAUTIONS
WARNING and CAUTION statements denote a hazard. Follow all instructions contained in these
statements.
A WARNING statement calls attention to an operating procedure, practice, or condition, which, if not
followed correctly, could result in injury or death to personnel.
A CAUTION statement calls attention to an operating procedure, practice, or condition, which, if not
followed correctly, could result in damage to or destruction of part or all of the product.
WARNING:
Do not alter the ground connection. Without the protective ground
connection, all accessible conductive parts (including control knobs) can
render an electric shock. The power jack and mating plug of the power
cable meet IEC safety standards.
WARNING:
To avoid electrical shock hazard, disconnect power cord before removing
covers. Refer servicing to qualified personnel.
CAUTION:
Before connecting the line cord to the AC mains, check the rear panel AC
line voltage indicator. Applying a line voltage other than the indicated
voltage can destroy the AC line fuses. For continued fire protection, replace
fuses only with those of the specified voltage and current ratings.

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Table of Contents
1. PRODUCT INTRODUCTION................................................................................................5
1.1 Description .......................................................................................................................5
1.2 Key features......................................................................................................................5
2. SPECIFICATIONS ..................................................................................................................6
2.1 Function Generator...........................................................................................................6
2.2 Universal Counter.............................................................................................................9
2.3 General .............................................................................................................................10
3. PANEL DESCRIPTION ..........................................................................................................11
3.1 Front Panel........................................................................................................................11
3.1.1 Overview of Keys ....................................................................................................11
3.1.2 DisplayAnnunciators...............................................................................................12
3.1.3 Description of front panel keys................................................................................13
3.1.3 Description of menu parameters ..............................................................................14
3.2 Rear Panel.........................................................................................................................17
4. OPERATING INSTRUCTIONS..............................................................................................18
4.1 Installation........................................................................................................................18
4.2 Main operating modes......................................................................................................18
4.3 Waveform Selection..........................................................................................................19
4.4 Data entry.........................................................................................................................20
4.5 Output Configuration........................................................................................................21
4.5.1 Set Frequency and Period.........................................................................................21
4.5.2 SetAmplitude...........................................................................................................21
4.5.3 Set DC Offset Voltage..............................................................................................22
4.5.4Adjust duty cycle......................................................................................................22
4.5.5 TTL Signal ...............................................................................................................23
4.5.6 Signal Store and Recall............................................................................................23
4.6 Set Modulation and Sweep Parameters ............................................................................24
4.6.1. Sweep mode............................................................................................................24
4.6.2 FM modulation.........................................................................................................26
4.6.3AM modulation........................................................................................................27
4.6.4 Burst modulation......................................................................................................28
4.6.5 FSK modulation.......................................................................................................30
4.6.6 PSK modulation.......................................................................................................31
4.7 Set System Parameters......................................................................................................32
4.8 Universal Counter.............................................................................................................34
5. REMOTE INTERFACE REFERENCE...................................................................................35
5.1 Introduction ......................................................................................................................35
5.2 Overview and syntax of SCPI instructions.......................................................................35
5.3 Detailed description of SCPI Instructions ........................................................................39
6. USER PROGRAMMABLEARBITRARY WAVEFORM MODULE....................................47
7. APPENDIX..............................................................................................................................57
A) Declaration of conformity .................................................................................................58
B) Service and Warranty Information.....................................................................................57

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1. PRODUCT INTRODUCTION
1.1 Description
The B&K Precision 4080 Series are laboratory grade synthesized function generators with a wide
frequency range of up to 120 MHz. Direct digital synthesis (DDS) techniques are used to create
stable, accurate output signals for clean, low distortion sine waves and an extensive selection of
built-in standard and arbitrary waveforms. The instrument supportsAM, FM, FSK, PSK and pulse
modulation and linear and logarithmic sweep. Modulation parameters can be set precisely and are
adjustable over a wide range. The 4080 Series supports internal and external modulation sources as
well as internal, external and gated trigger sources.
All models are capable of generating complex, predefined arbitrary waveforms. Additionally,
models 4084AWG and 4086AWG provide the flexibility to create custom waveforms. The AWG
module includes an intuitive, graphical Windows based software tool for creating and editing
custom arbitrary waveforms and transferring the waveforms to the instrument’s non-volatile
memory. The software also provides a direct interface to Tektronix® TDS1000, TDS2000
TPS2000 and TDS3000 series digital storage oscilloscopes offering users a convenient means to
recreate waveforms originating from the DSO’s display or internal memory.
The 4080 Series front-panel operation is straightforward. Parameters can be entered using the knob
or directly via the numerical keypad and unit keys.
The instruments are fully programmable via the standard RS232 interface. The command set is
SCPI (standard Commands for Programmable Instruments) compatible.
The combination of classical function and arbitrary waveform generator makes this series a versatile
solution for many applications in Electronic Test and Design, Sensor Simulation, Education and
Training.
1.2 Features
Direct Digital Synthesis (DDS) architecture
Wide frequency range of 1µHz ~ 120MHz (model 4087, sine wave only)
Clean and stable output of very small signals down to 1mV (50Ω)
27 build-in standard and complex waveforms.
Eight downloadable 16000 point memories for custom arbitrary waveforms (models
4084AWG and 4086AWG only)
GraphicalArbitrary Waveform Generation Software tool for Microsoft® WindowsTM
(models 4084AWG and 4086AWG only)
Convenient data input via knob or numerical keypad.
Bright, easy to read display using VFD (Visible Vacuum Fluorescent) technology
Fully programmable via SCPI compatible command set
100 MHz Universal Counter with frequency measurement and totalize function

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2. SPECIFICATIONS
2.1 Function Generator
Waveform Characteristics
Main Waveforms: Sine, square
WaveformAmplitude resolution: 12 bits
Sample Rate: 200MSa/s (4084, 4084AWG, 4085, 4086, 4086AWG)
300MSa/s (4087)
Sine:
Harmonic Distortion of Sine Wave:
≤ - 50dBc (frequency ≤ 5MHz)
≤ - 45dBc (frequency ≤ 10MHz)
≤ - 40dBc (frequency ≤ 20MHz)
≤ - 35dBc (frequency ≤ 40MHz)
≤ - 30dBc (frequency > 40MHz)
Total Harmonic distortion: 0.1% (20Hz ~ 100kHz)
Square:
Rise and Fall Time of Square Wave: ≤15ns
Note: Test conditions for harmonic distortion, sine distortion, rise/fall time: Output
Amplitude 2Vp-p, Environmental temperature: 25℃±5℃
Build in standard and complex (arbitrary) waveforms:
27 build-in standard and complex waveforms.
Sine, Square, Triangle, Positive Ramp, Falling Ramp, Noise, Positive Pulse, Negative
Pulse, Positive DC, Negative DC, Stair wave, Coded Pulse, Full wave rectified,
Half-wave rectified, Sine transverse cut, Sine vertical cut, Sine phase modulation,
Logarithmic, Exponential, Half-round, SINX/X, Square root, Tangent, Cardiac,
Earthquake, Combination
Waveform Length: 4096 dots
Amplitude Resolution: 10 bits
Pulse Wave:
Duty Cycle: 0.1% ~ 99.9% (below 10kHz), 1% ~ 99% (10kHz ~ 100kHz)
Rise/Fall Time: ≤100ns （Duty cycle 20%）
DC signal characteristics:
DC range: ≤ 10mV – 10V (high impedance)
DC Accuracy: ≤ ±5% of setting +10mV (high impedance)
Module for user defined arbitrary waveform generation (models 4084AWG and 4086AWG only)
Number of memory locations for arbitrary waveforms: 8
Length of waveforms：8~16000 points
Resolution of waveform amplitude：10 bits
Frequency range：100μHz~100kHz

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Frequency Characteristics
Frequency Range:
Main waveforms (sine, square):
Model 4084/4084AWG: 1µHz ~ 20MHz
Model 4085: 1µHz ~ 40MHz
Model 4086/4086AWG 1µHz ~ 80MHz (sine wave)
1µHz ~ 40MHz (square wave)
Model 4087 1µHz ~ 120MHz (sine wave)
1µHz ~ 40MHz (square wave)
All other waveforms:
All models: 1µHz ~ 100kHz
Frequency Stability: ±1×10-6 (22℃±5℃）
Resolution: 1µHz
FrequencyAccuracy: ≤ ± 5×10-6 (22℃±5℃）
Data entry Units: s, ms, Hz, kHz, MHz
Amplitude Characteristics
Amplitude Range:
4084, 4084AWG: 2mV ~ 20Vpp (open circuit), 1mV ~ 10Vpp (50Ω)
4085
4086, 4086AWG: for Freq ≤ 40MHz: 2mV ~ 20Vpp (open circuit), 1mV ~ 10Vpp (50Ω)
for Freq > 40MHz: 2mV ~ 4Vp-p (open circuit), 1mV ~ 2Vpp (50Ω)
4087: for Freq ≤ 40MHz: 2mV ~ 20Vpp (open circuit), 1mV ~ 10Vpp (50Ω)
for Freq > 40MHz: -76dBm ~ +13.5 dBm（50Ω）or 0.1mV ~ 3Vpp（50Ω）
Max. Resolution: 2µVpp (open circuit), 1µVpp (50Ω)
Amplitude Accuracy: ± 1%+0.2mV (sine wave relative to 1kHz)
Amplitude Stability: ±0.5 % /3 hours
Flatness:
For amplitude ≤ 2Vpp: ±3% (frequency≤5MHz), ±10% (5MHz<frequency≤40MHz)
For amplitude >2Vpp: ±5% (frequency≤5MHz), ±10% (5MHz<frequency≤20MHz)
±20% (frequency>20MHz)
Models 4086/AWG, 4087 only: ±1dBm (frequency>40MHz)
Output Impedance: 50Ω
Output Units: Vpp, mVpp, Vrms, mVrms, dBm

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DC Offset Characteristics
Offset Range (open circuit)
Freq ≤ 40MHz): ±10Vpk ac + dc (Offset ≤ 2×peak-to peak amplitude)
Freq > 40MHz): ±2Vpk ac + dc (Offset ≤ 2×peak-to peak amplitude)
Resolution: 2µV (open circuit), 1µV (50Ω)
Offset Error: ±5% of setting +10mV (Ampl. ≤ 2Vpp into open circuit)
±5% of setting +20mV (Ampl. > 2Vpp into open circuit)
AM Characteristics
Carrier Waveforms: sine or square
Carrier Frequency Range: same as main waveforms
Modulation Source internal or external
Modulating Waveform: 5 internal waveforms (sine, square, triangle, rising/falling ramp)
Frequency of modulating signal: 100µHz ~ 20kHz
Distortion: ≤2%
Modulation Depth: 1% ~ 120%
1% ~ 80% (frequency>40MHz, Ampl > 2Vpp into open circuit)
Modulation Error: ± 5%+0.2% (100µHz < frequency ≤ 10kHz)
±10%+2% (10kHz < frequency ≤ 20kHz)
Amplitude of ext. input signal: 3Vp-p (-1.5V~ +1.5V)
FM Characteristics
Carrier Waveforms sine or square
Carrier Frequency Range: same as main waveforms
Modulation Source: internal or external
Modulating Waveform: 5 internal waveforms (sine, square, triangle, rising/falling ramp)
Frequency of modulating signal: 100µHz ~ 10kHz
Peak Frequency Deviation: Max. 50% of carrier frequency for internal FM
Max 100kHz (carrier frequency≥5MHz) for external FM,
with input signal voltage 3Vp-p (-1.5V~+1.5V)
FSK Characteristics
Carrier Waveform sine or square
Carrier Frequency Range: same as main waveforms
Control Mode internal or external trigger (external: TTLlevel, low level F1,
high level F2)
FSK Rate: 0.1ms ~ 800s
PSK Characteristics
Waveform: sine or square
Frequency Range: same as main waveforms
PSK: Phase 1 (P1) and Phase 2 (P2), range: 0.0 ~ 360.0°
Resolution: 0.1°
PSK rate: 0.1ms ~ 800s

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Control Mode: internal or external trigger (external: TTL level, low level P1,
high level P2)
Burst Characteristics
Waveform: sine or square
Frequency Range: same as main waveforms
Burst Counts : 1 ~ 10000 cycles
Time interval between bursts: 0.1ms ~ 800s
Control Mode: internal, single or external gated trigger
Frequency Sweep Characteristics
Waveform: sine or square
Start/Stop Freq.: same as main waveforms
Sweep Time: 1ms ~ 800s (linear), 100ms ~ 800s (log)
Sweep Mode: Linear or Logarithmic
External trigger signal frequency: DC ~ 1kHz (linear) DC~10Hz (log)
Control Mode: internal or external trigger
Rear Panel Terminals (for modulation and sweep)
Output MOD OUT
Frequency: 100μHz ~ 20kHz
Waveform: sine, square, triangle, rising/falling ramp
Amplitude: 5Vp-p ± 5%
Output Impedance: 600Ω
Modulation IN
3 Vpp = 100% Modulation
External Input Trig/FSK/Burst
Level: TTL
Main OUTput
Impedance: 50Ω
Protection: Short circuit and overload protected
State Storage Characteristics
Storage Parameters: frequency, amplitude, waveform, DC offset values, modulation
parameters
Storage Capacity: 10 user configurable stored states
Storage Time: more than 10 years
2.2 Universal Counter
Frequency Range
Frequency Measurement: 1Hz ~ 100MHz
Totalize mode: 50MHz max

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Input Characteristics
Sensitivity
Input attenuator disabled: 50mVrms (f: 10Hz ~ 50MHz), 100mVrms (f: 1Hz ~ 100MHz)
Input attenuator enabled: 0.5Vrms (f: 10Hz ~ 50MHz), 1Vrms (f: 1Hz ~ 100MHz)
Max. Input Voltage Allowed: 100Vp-p (f≤100kHz), 20Vp-p (1Hz~100MHz)
Input Impedance: R>500kΩ, C<30pF
Coupling: AC
Waveform: sine or square
Low Pass Filter: cut off frequency about 100kHz (with internal attenuation: ≤ -3dB)
with external attenuation: ≥ -30 dB (f >1MHz)
Gate Time Setting: 10ms ~ 10s continuously adjustable
Display Bits: 8 (for gate Time>5s)
Totalize Capacity: ≤ 4.29×109
Control Mode: manual or external gate control
Accuracy: time base error ± trigger error (when signal SNR > 40dB,
trigger error ≤ 0.3)
Time base:
Type: small TCXO
Frequency: 10MHz
Stability: ±1 × 10-6 (22°C±5°C)
2.3 General
AC Input 198~242V or 99~121V, Frequency: 47~ 63Hz
Power Consumption: <35VA
Operating Temperature 0° to +40 °C
Operating Humidity 80% R.H
Storage Temperature -40℃to 70℃
Dimensions (W x H x D): 255 mm x 100 mm x 370 mm (10.0 x 3.93 x 14.56 inch)
Weight: 3 kg (6.6 lbs): models 4084, 4084AWG, 4085, 4086, 4086AWG
3.5 kg (7.7 lbs) model 4087
Remote Interface RS232
Accessories included
BNC to alligator cable
BNC to BNC cable
RS232 communication cable
Power line cord
Test report
Spare fuse
Installation disk for Arbitrary Waveform Creation Software (models 4084AWG or 4086AWG only)
NOTE: Specifications and information are subject to change without notice. Please visit www.bkprecision.com for
the most current product information.

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3. PANEL DESCRIPTION
3.1 Front Panel
3.1.1 Overview of Keys:
Summary: Most keys have multiple functions. Primary functions are written on the key. Simply
press the respective key to enable a primary functions. All Function/Mode keys and some of the
numerical entry keys have associated secondary functions indicated above each key in blue. To
activate a secondary function, press the 【shift】key followed by the desired key. The bottom row
of the Function/Mode keys can be used to enter units directly. The unit is indicated below each key.
To enter a unit, enter a numerical value via the numerical keypad then press the corresponding unit
key. The unit key also serves as Enter function.
Data entry keys:
Key
Name
Main
Function
Secondary
Function
Key
Name
Main function
Secondary
Function
0
Input Digit 0
Enter SW mode
7
Input Digit 7
Enable ARB7
waveform ***.
1
Input Digit 1
EnableARB1
waveform ***
8
Input Digit 8
Enable ARB8
waveform ***
2
Input Digit 2
EnableARB2
waveform ***
9
Input Digit 9
Not available
3
Input Digit 3
EnableARB3
wave ***
●
Input decimal point
Reset Unit
4
Input Digit 4
EnableARB4
waveform***
▬
Input negative
symbol
Enter system menu
5
Input Digit 5
EnableARB5
waveform ***
◄
Move arrow key to
left *
Select pulse
6
Input Digit 6
EnableARB6
waveform***
►
Move arrow key to
right **
Select Arblist
waveform
*: Direct number entry: Press this key to clear the least significant bit of the displayed number.
Useful for correcting number entry before entry is confirmed with unit key.
External totalize mode: Press this key to stop counting and display present counting value.
Press again to resume counting.

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**: External totalize mode: Press this key to reset and resume event counter
*** models 4084AWG and 4086AWG only
Function/Mode Keys:
Key name
Main Function
Secondary
Function
Secondary
Function for
Counter Mode
Unit Entry
Freq./Period
Toggle between
Frequency &
Period.
Enable Sine Wave
NotAvailable
NotAvailable
Ampl./Pulse
width
Amplitude Select.
Enable Square
Wave.
NotAvailable
NotAvailable
FSK/PSK
FSK/PSK
Function Select
Enable Triangle
Wave
NotAvailable
Not Available
Menu
Menu Selection
Enable positive
ramp
NotAvailable
NotAvailable
FM
Enable FM mode
Enter Storage
menu
Attenuation
Selection
ms, mVpp
AM
EnableAM mode
Enter Recall menu
Low Pass Select
MHz, Vrms
Sweep
Enable Sweep
mode
Enter Counter
Mode
Freq. Meas./
Totalize Enable
kHz, mVrms
Burst
Enable Burst
mode
DC Offset Select
Gate Select
Hz, dBm
Other Keys:
Key Name
Main Function
Other Function
Output
Main OUTPUT signal On/Off
Generate single trigger in sweep and
burst mode
Shift
Select secondary function
Enter units in s, Vpp, N
3.1.2 Display Annunciators:
Display areas:
①Waveform Indication
②Main Alphanumeric Display
③Frequency Measurement/Totalize Settings
④Instrument states

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Waveform states
Sine waveform is enabled (,main waveform)
Square waveform is enabled (main waveform)
Triangle waveform is enabled
Ramp waveform is enabled
Arb Arbitrary waveform mode is enabled
Frequency Measurement/Totalize states
Filter: Low Pass Filter is enabled
ATT: Input Attenuator is enabled
GATE: Gate received trigger
Function Generator states
Adrs: The instrument is in remote state.
Trig: Function Generator is waiting for a single trigger or external trigger.
FM: FM modulation is enabled
AM: AM modulation is enabled
Sweep: Sweep mode is enabled
Ext: Generator is configured for external signal input
Freq: Frequency measurement function is enabled
Count: Totalize function is enabled
FSK: FSK (frequency shift keying) modulation is enabled
◄FSK: PSK modulation is enabled
Burst: Burst mode enabled.
Offset: DC offset of output signal is not 0.
Shift: Shift key has been pressed, Shift mode is active
Rmt: The instrument is in remote state.
3.13 Description of front panel keys
【shift】key
Access secondary functions or to enter units “seconds”, Vpp and “N”
Numerical key pad:
Keys are used for direct entry of numerical values. Keys【0】【 ●】【 -】are assigned secondary
functions to enter the systems menu, reset the unit to its default values or revert to Standard
Waveform (“SW”) mode.
【◄】【 ►】arrow keys
The primary function is to move the flashing digit left or right or to select the desired arbitrary
waveform from theArb List (secondary function). When in Counter Mode, these 2 keys are
used to start/stop or reset/resume the counter.
【Freq/Period】key:
Toggle between frequency and period display (primary function) or to enable sine waveform.
【Ampl/Pulse Width】key:
Display and adjust the amplitude of waveforms or, when in pulse mode, toggle the display

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MODE —> START F —> STOPF —> TIME —>TRIG
______________-
between amplitude and pulse width. The secondary function activates the square waveform
【FSK/PSK】key:
Toggle between FSK and PSK modulation (primary function). Activate triangle waveform
【Menu】key:
Enter modulation parameters for FSK, PSK, FM, AM and burst modulation and for sweep
mode. When in standard waveform mode (no modulation, main waveforms enabled), this key
can also be used to toggle the units for the amplitude display value between Vpp, Vrms and
dBm. (Press theAmplitude key first, then the Menu key to toggle between the units). The
secondary function enables the ramp waveform.
【FM】key:
Activate FM modulation (primary function). Enter Storage mode (secondary function). Enter
units ms or mVpp after entering the desired value by numerical key pad. In Counter Mode, this
key turns the input attenuator on or off.
【AM】key:
ActivateAM modulation (primary function). The secondary function is used to recall and
recreate signals stored in status memory. Enter units “MHz and “Vrms” after entering the
desired value by numerical key pad. Enable the low pass filter when in Counter mode.
【Sweep】key:
Activate sweep mode. Select frequency measuring and totalize mode (secondary function) .
Enter units kHz or mVrms after entering the desired numerical value directly via the keypad.
Use the Shift key to toggle between frequency measurements and totalize mode.
【Burst】key:
Activate burst mode (primary function). Enter DC offset mode (secondary function). Enter
units Hz or dBm. When in frequency measurement mode, press this key to enter the gate time.
【Output】key
Press this key to toggle the main OUTPUT signal between the ON and OFF state. By default
the output is turned on, indicated by the green LED and the currently active wave form is
available at the OUTPUT terminal. In Burst or Sweep mode, this key is also used to generate a
single trigger.
3.14 Description of menu parameters
Use this key to configure modulation parameters, sweep mode parameters and system parameters.
Modulation and Sweep mode: After enabling modulation or sweep mode, press “menu” to
configure the related parameters. Each time you press the menu key, the parameter will flash for 1
second, followed by the currently active value of that parameter. Use the knob or numerical keys to
enter a new value. Once the parameter is set, press 【menu】to advance to the next parameter.
Continue pressing the menu key to cycle through all parameters. Press 【Shift】【 SW】to return to
the main waveform mode and to set the carrier waveform parameters.
Sweep Mode:

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FM DEVIA—> FM FREQ —> FM WAVE —> FM SOURCE
AM LEVEL—> AM FREQ —> AM WAVE —> AM SOURCE
TRIG —> COUNT —> SPACE T —> PHASE
START F —> STOP F—> SPACE T —> TRIG
P1 —> P2 —> SPACE T —> TRIG
MODE: Select LINEAR or LOGarithmic sweep
START F:Sweep start frequency
STOP F: Sweep stop frequency
TIME: Sweep time
TRIG: Select trigger source, INTernal or EXTernal
FM modulation:
FM DEVIA: Peak frequency deviation
FM FREQ: Modulating signal frequency
FM WAVE: Modulating signal waveform (sine, square, triangle rising or falling ramp)
FM SOURCE:Toggle between internal and external modulating signal.
AM modulation:
AM LEVEL: Modulation depth
AM FREQ: Frequency of modulating signal
AM WAVE: Modulating signal waveform (sine, square, triangle rising or falling ramp)
AM SOURCESelect internal or external modulating signal
Burst modulation:
TRIG Select trigger source, internal or external
COUNT: Number of burst cycles
SPACE T:Burst time spacing
PHASE: starting phase of the burst
FSK modulation:
START F Primary frequency (same as carrier wave)
STOP F the second frequency (hop frequency)
SPACE T FSK rate
TRIG Select trigger source, external or internal
PSK modulation
P1 phase value #1
P2: phase value #2

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POWER ON —> ADDRESS —> OUT Z —> INTERFACE—>…..
…………BAUD —> PARITY —> BEEP
SPACE T: PSK rate
TRIG: trigger mode, internal or external
System Function Mode:
POWER ON “Power on” state
ADDRESS: set GPIB address (option)
OUT Z: Configure amplitude display value for 50Ωor high impedance load termination
INTERFACE: Select RS232 or GP-IB (IEEE-488) interface (option)
BAUD: Baud rate for the RS232 interface
PARITY: Parity and Data Bits configuration for RS232
BEEP: Toggle the key beep on/off

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3.2 REAR PANEL
Ext. Trig/FSK/Burst:
Input Terminal for external trigger signals for FSK/PSK Burst modulation and sweep mode
MOD In
Apply modulating signal forAM and FM to this Input terminal
Meas Freq/TOT In
Input terminal for Universal Counter which operates in frequency measurement or Totalize
mode
MOD OUT
The internally generated modulating signal when inAM mode will be available at this output
RS232C
RS232 interface for remote control of instrument (all models) or for download of custom
arbitrary waveforms (models 4084AWG and 4086AWG only)
AC Socket and fuse compartment
Connect the supplied power line cord to this receptacle. Make sure to install the appropriate
fuse according to the selected AC voltage.
AC Input Selector switch
Set this switch to the correspondingAC voltage in your area

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4. OPERATING INSTRUCTIONS
4.1 Installation
This section contains installation information, power requirements and initial inspection and signal
connections for the 4080 series generators.
Mechanical Inspection
This instrument was carefully inspected before shipment. Upon receipt, inspect the instrument for
damage that might have occurred in transit. If any sign of damage is found, notify your B+K
Precision distributor.
Instrument Mounting
The 4080 Series is intended for bench use. The instrument includes a handle adjustable for
optimum panel viewing angle. The instrument does not require special cooling when operated
within conventional temperature limits.
Power Requirements
The 4080 Series can be operated from any source of 99V to 242VAC and frequency of 48Hz to
63Hz. The maximum power consumption is 35 VA. Replace fuses with the same type, according to
the rating indicated on the rear panel of the instrument.
The instrument power fuse is located in a fuse compartment below the AC input receptacle. To
access the fuse, first disconnect the power cord and then remove the fuse cartridge.
Power-on procedure
Turn on the instrument by pressing the power key on the front panel of the unit. The display should
be flashing “BK PRECISION” for 2 seconds followed by the model number. e.g. .“4084AWG” for 1
second. By default, the instrument will enter the standard waveform (“SW”) mode with the
frequency set to 10.00000000 kHz and the waveform annunciator displaying the “~ “ symbol. If
the Power ON configuration in the systems menu was modified, the parameters of the last operation
before power-down will be displayed.
4.2. Main operating modes
“SW” standard waveform mode
In this mode, the generator outputs any of the 27 build-in waveforms, including the 2 “main
waveforms” sine and square. This also includes the 8 user programmable arbitrary waveforms
(models 4084AWG and 4086AWG only). For most waveforms, you can set frequency, amplitude
and DC offset. In this mode, modulation and sweep is not active and all annunciators in status area 4
are turned off. When modulation or sweep is enabled, press【shift】【 SW】to return to this mode.
Modulation, Pulse and Sweep Mode
In this mode, the generator operates like a conventional function generator and theArb annunciator
is turned off. The user can select one of the modulation modesAM, FM, FSK, PSK, Burst or sweep
mode. The 2 main waveforms sine and square can be used as carrier signal.
There is a close, reciprocal relationship between the modulation/sweep mode and the standard

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waveform mode used to set the sine or square wave parameters. When one of the modulation modes
is active, the parameters of the carrier wave are carried over from the Standard Waveform Settings
(for sine or square). Press【shift】【 SW】to toggle between anyof the modulation/sweep modes (to
set the modulation parameters) and the standard waveform mode (to define the carrier settings for
frequency, amplitude and DC offset). On the other hand, the carrier frequency can also be set in the
modulation/sweep menus and if changed, will overwrite the standard waveform frequency setting.
Example: When transitioning fromstandard waveform mode to FM modulation mode, (by pressing
the FM button) the parameters set previously in “SW” mode carry over to the FM mode and are now
defining the FM carrier. If the FM carrier frequency in the FM modulation menu is changed, it will
also “overwrite” the frequency setting of the standard waveform” settings.
To adjust the duty cycle, enable pulse mode by pressing 【shift】【◄】. Note that the duty cycle
can only be adjusted in pulse mode.
4.3 Waveform Selection:
Enabling common waveforms
Press【shift】followed bythe waveformkey to select oneof the 5 common waveforms sine, square,
triangle, ramp and pulse. The corresponding waveform annunciator will be displayed in the
waveform display area. Note that the instrument operates in Function Generator mode when
selecting sine and square and in ARB mode for the remaining functions. (Arb annunciator is lit).
Note: The 5 common waveforms can alsobe output by selecting the corresponding number from the
ArbList in this section.
Example: Press 【Shift】【 FSK/PSK】to enable the triangle waveform
Enabling stored waveforms from the Arb List
Make sure you are in “SW” mode. (All area 4 status annunciators are off). If modulation or sweep
is active, press【shift】【SW】to return to the standard waveform mode.
Press【shift】【►】to enter the ArbList: Waveform,”6: NOISE” is enabled and appears on the display.
Use the knob or the numeric keypad to select one of the 27 stored waveforms from the ArbList
according to the table in this section.
Example: To select negative ramp DOWN_RAMP, do the following:
Press 【shift】【►】(enter ArbList)
Press 【5】【 N】(enable DOWN_RAMP)
or
select waveform with the knob
Models 4084AWG and 4086AWG only: Locations 28-35 are reserved for the storage of user
defined arbitrary waveforms. The display name for these waveforms isARB1-ARB8. These
memory locations can be accessed in one of 2 ways:
a) Enter theArbList, then use the knob or the numeric keypad to enable waveforms ARB1 –ARB8
b) Press 【Shift】followed by any number between 1-8.
Example: Press 【Shift】【 2】to enable waveform stored in memory locationARB2

4080 series Function &Arbitrary/Function Generators –Instruction Manual
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Table of stored waveforms (ArbList) and their memory locations
No.
Waveform
Display Name
No.
Waveform
Display Name
1
Sine wave
SINE
15
Half-wave rectified
COMMUT_HA
2
Square wave
SQUARE
16
Sine transverse cut
SINE_TRA
3
Triangle wave
TRIANG
17
Sine vertical cut
SINE_VER
4
Ramp
UP_RAMP
18
Sine phase modulation
SINE_PM
5
Falling ramp
DOWN_RAMP
19
Logarithmic function
LOG
6
Noise
NOISE
20
Exponential function
EXP
7
Pulse wave
PULSE
21
Half-round function
ROUND_HAL
8
Positive pulse
P_PULSE
22
SINX/X function
SINX/X
9
Negative pulse
N_PULSE
23
Square root function
SQU_ROOT
10
Positive DC
P_DC
24
Tangent function
TANGENT
11
Negative DC
N_DC
25
Cardiac wave
CARDIO
12
Stair wave
STAIR
26
Earthquake wave
QUAKE
13
Coded pulse
C_PULSE
27
Combination wave
COMBIN
14
Full wave
rectified
COMMUT_FU
28~35*
User programmable
Arbitrary waveforms
ARB1~ARB8
Note:
*No 28~35: memory location for user programmable waveforms, models 4084AWG and 4086AWG only. Refer to
chapter 7 for more details
4.4 Data entry
Using the arrow keys and the knob
Use the knob and arrow keys to modify the displayed number.
Use the【◄】【 ►】keys to move the flashing digits left or right then adjust the value with the knob.
Using this method of entry, the output signal will be updated immediately. Move the arrow keys left
for coarse adjustment and right for fine adjustment.
To disable the knob, use the【◄】【 ►】keyto move the cursor all the way to the left or right until
the digits stop flashing. Now data entry via the knob is disabled.
Direct entry using the numerical key pad
Use the numerical keypad to enter a number with the appropriate unit.
Enter numbers from left to right. Use the【●】key to enter a decimal point. Enter【-】for negative
numbers. Repeatedly pressing this key will toggle between positive (no sign visible) and negative
numbers. Numerical entries do not update the output signal until a unit key has been pressed. Once
you entered the correct numerical value, press the appropriate unit key to assign a unit and to make
the entry effective. The instrument will now output a signal according to the displayed data.
For entries not associated with a unit, press the shift key (“N” = “no unit”) to make the entry
effective.
Note: Numerical values entered via the keypad are not effective until a valid unit key or shift (“N”)
has been pressed.