B&K Precision 4010A User Manual [en, es]
INSTRUCTION
MANUAL
MANUAL DE USUARIO
MODEL 4010A
MODELO 4010A
2 MHz
FUNCTION
GENERATOR
2MHz GENERADOR
DE FUNCIONES
1
TEST INSTRUMENT SAFETY
WARNING
Normal use of test equipment exposes you to a certain amount of danger from electrical shock because testing must sometimes be
performed where exposed voltage is present. An electrical shock causing 10 milliamps of current to pass through the heart will stop most
human heartbeats. Voltage as low as 35 volts dc or ac rms should be considered dangerous and hazardous since it can produce a lethal
current under certain conditions. Higher voltages pose an even greater threat because such voltage can more easily produce a lethal
current. Your normal work habits should include all accepted practices to prevent contact with exposed high voltage, and to steer current
away from your heart in case of accidental contact with a high voltage. You will significantly reduce the risk factor if you know and
observe the following safety precautions:
1. Don't expose high voltage needlessly. Remove housings and covers only when necessary. Turn off equipment while making test
connections in high-voltage circuits. Discharge high-voltage capacitors after removing power.
2. If possible, familiarize yourself with the equipment being tested and the location of its high voltage points. However, remember that
high voltage may appear at unexpected points in defective equipment.
3. Use an insulated floor material or a large, insulated floor mat to stand on, and an insulated work surface on which to place
equipment; and make certain such surfaces are not damp or wet.
4. Use the time proven "one hand in the pocket" technique while handling an instrument probe. Be particularly careful to avoid
contacting a nearby metal object that could provide a good ground return path.
5. When testing ac powered equipment, remember that ac line voltage is usually present on some power input circuits such as the on-
off switch, fuses, power transformer, etc. any time the equipment is connected to an ac outlet, even if the equipment is turned off.
(continued on inside back cover)
2
Instruction Manual
for
MODEL 4010A
2 MHz
FUNCTION
GENERATOR
22820 Savi Ranch Parkway
Yorba Linda, CA 92887
www.bkprecision.com
3
TABLE OF CONTENTS
page
TEST INSTRUMENT SAFETY............... inside front cover
INTRODUCTION ............................................................ 5
SPECIFICATIONS...........................................................6
CONTROLS AND INDICATORS ....................................8
OPERATING INSTRUCTIONS..................................... 10
Frequency and Waveform Selection ............................10
Considerations ........................................................... 11
Duty Cycle Control .................................................... 12
TTL/CMOS Output .................................................... 13
Voltage Controlled Frequency Operation..................... 13
Output Protection Considerations ............................... 14
Function Generator Applications Guidebook ..............14
page
MAINTENANCE........................................................... 15
Fuse Replacement....................................................... 15
Function Generator Guidebook ................................... 15
CUSTOMER SUPPORT ................................................ 16
SERVICE INFORMATION............................................ 17
LIMITED TWO-YEAR WARRANTY............................ 18
SPANISH MANUAL ..................................................... 20
4
INTRODUCTION
The B+K Precision Model 4010A Function Generator is a
versatile signal source which combines several functions into one
unit. A calibrated dial provides frequency accuracy within 5%.
High stability assures that the output frequency does not drift.
The heart of the function generator is a VCG (voltage-controlled
generator) that produces precision sine, square, or triangle waves
over the 0.2 Hz to 2 MHz range. This encompasses subaudible,
audio, ultrasonic, and RF applications. A continuously variable dc
offset allows the output to be injected directly into circuits at the
correct bias level.
Variable symmetry of the output waveform converts the
instrument to a pulse generator capable of generating
rectangular waves or pulses, ramp or sawtooth waves, and
slewed sine waves.
In addition to the above features, an external signal may
be used to sweep the output frequency or control operating
frequency. This is useful in situations where an externally
controlled frequency is desirable.
With this versatility, the unit has a vast number of
applications in both analog and digital electronics in the
engineering, manufacturing, servicing, educational, and
hobbyist fields.
5
SPECIFICATIONS
FREQUENCY CHARACTERISTICS
Waveforms
Sine, Square, Triangle, ± Pulse, ± Ramp
Range
0.2 Hz to 2 MHz in 7 ranges
Dial Accuracy
± 5%
Tuning Range
10:1
Variable Duty Cycle
15:85:15 Continuously Variable
Operating Modes
Normal, VCG (Voltage Controlled Generator)
OUTPUT CHARACTERISTICS
Impedance
50 Ω ± 10%
Level
20 V p-p Open-circuit, 10 V p-p into 50Ω
Amplitude Control
Variable, 20 dB range typical
Attenuation
-20 dB ±1 dB
DC Offset
Preset: ±0.1 V typical
Variable: ±10V open-circuit, ±5V into 50 Ω
SINE WAVE
Distortion
4% typical at 1 kHz
Flatness
±5% (0.45 dB)
SQUARE WAVE
Symmetry
≤2% 0.2 Hz to 100 kHz
Rise Time
≤120 nS
TRIANGLE WAVE
Linearity
≥98% to 100 kHz
6
SPECIFICATIONS
TTL OUTPUT
Level 0.8 V to 2.4 V
Rise Time ≤20 nS
Duty Cycle 50% typical
CMOS OUTPUT
Level 4 V to 14 V ±0.5V p-p,
Continuously Variable
Rise Time ≤50 nS
POWER SOURCE
DIMENSIONS (H x W x D)
WEIGHT
VCG (Voltage Controlled Generator) INPUT
Input Voltage
0 - 10 V ±1 V causes a 100:1 frequency change
Impedance
10 kΩ ±5%
NOTE: Specifications and information are subject to change without notice. Please visit
information.
ACCESSORIES
120 / 230 VAC ±10%, 50 / 60 Hz, internal jumper
selectable
4 1/2" x 10 1/2" x 12 1/4" (26.7cm x 11.4cm x 31.1cm)
4.1 lb. (1.845 kg.)
Instruction Manual
Output Cable, BNC to Alligator Clips
www.bkprecision.com for the most current product
7
CONTROLS AND INDICATORS
FRONT PANEL (Refer to Fig. 1)
1. POWER Switch. Turns power on and off.
2. RANGE Switch. Selects output frequency range. Seven
ranges from 2 Hz to 2 MHz. Switch indicates maximum
frequency of range and is adjusted with FREQUENCY
control to 0.1 times the maximum. For example, if the
200 kHz range is selected, the output frequency can be
adjusted from 20 kHz to 200 kHz.
3. FUNCTION Switch. Selects sine, square, or triangle
waveform at OUTPUT jack.
4. OUTPUT LEVEL Control. Controls the amplitude of
the signal at the OUTPUT jack. Output level can be
decreased by approximately 20 dB with this control.
5. DC OFFSET Control. Enabled by the DC OFFSET
Switch (12). Clockwise rotation from center changes the
DC offset in a positive direction while counterclockwise
rotation from center changes the DC offset in a negative
direction.
6. OUTPUT Jack. Waveform selected by FUNCTION
switch as well as the superimposed DC OFFSET voltage
is available at this jack.
7. TTL/CMOS Jack. TTL or CMOS square wave,
depending on the position of the CMOS LEVEL switch
(13) is output at this jack. This output is independent of
the OUTPUT LEVEL and DC OFFSET controls.
8. CMOS LEVEL Control. Rotating this control
clockwise increases the amplitude of the CMOS
square wave at the TTL/CMOS jack.
9. VCG Jack. Voltage Controlled Generator input.
Permits external control of generator output
frequency by a DC voltage input at this jack. A
positive voltage will decrease frequency.
10. DUTY CYCLE Control. Enabled by the DUTY
CYCLE Switch (14). Rotation from center position
adjusts the duty cycle of the main OUTPUT signal.
11. -20 dB Switch. When engaged, the signal at the
OUTPUT jack is attenuated by 20 dB.
12. DC OFFSET Switch. When engaged, enables
operation of the DC OFFSET control (5).
13. CMOS LEVEL Switch. When engaged, changes
the TTL signal to CMOS signal at the TTL/CMOS
jack.
14. DUTY CYCLE Switch. When engaged, enables
operation of DUTY CYCLE control (10).
15. FREQUENCY Control. Adjustment of the output
frequency from 0.1 to 1 times the selected range.
16. INV. Allows the user to invert the polarity of the
normal output signal.
8
CONTROLS AND INDICATORS
Figure 1. Model 4010A Controls and Indicators.
9
OPERATING INSTRUCTIONS
The B+K Precision Model 4010A Function Generator is a
versatile instrument, capable of producing a variety of output
waveforms over a broad range of frequencies. To gain a working
familiarity with the unit, it is recommended that it be connected
initially to an oscilloscope, so that the effects of the various
controls on the output waveforms can be observed. Use this
manual as required for reference until becoming accustomed to
the operating procedures.
FREQUENCY AND WAVEFORM SELECTION
l. Initially, verify that the DUTY CYCLE (14), CMOS
LEVEL (13), DC OFFSET (12), -20dB (11) switches are
in the OUT position (released). This will produce a
symmetrical waveform unaffected by the other controls.
2. Plug the unit into an appropriate power source and turn it on
by engaging the POWER switch (1).
3. Select the desired waveform (SINE, SQUARE, or
TRIANGLE) by engaging one of the FUNCTION switches
(3). Phase relationships of the waveforms are shown in Fig.
2.
4. Select the frequency of the waveform by engaging one of
the RANGE switches (2).
5. Rotate the FREQUENCY control (15) to set the output
frequency to the desired value. The frequency selected is
available at the OUTPUT jack (6). In addition, a digital
signal, either TTL or CMOS is available at the TTL/CMOS
jack (7) (refer to the “TTL/CMOS OUTPUT” section of this
manual).
10
Figure 2. Output Waveform and Phase
Relationship
6. Adjust the amplitude of the output as desired using the
OUTPUT LEVEL control (4). Rotation of this control
varies the amplitude from maximum to 20 dB below
maximum. An additional attenuation of -20 dB is
available by pushing in the -20dB switch (11). The
attenuation factors can be combined for a total of -40
dB. The maximum signal level is 10 V p-p (into 50 Ω).
OPERATING INSTRUCTIONS
Figure 3. Use of DC OFFSET Control
6. Remember that the output signal swing of the generator
is limited to ±10 volts open circuited or ±5 volts into 50
Ω, and applies to the combined peak-to-peak signal and
DC offset. Clipping occurs slightly above these levels.
Fig. 3 illustrates the various operating conditions
encountered when using the DC offset. If the desired
output signal is large or if a large DC offset is required,
an oscilloscope should be used to make sure that the
desired signal is obtained without undesirable clipping.
7. A superimposed DC component can be added to the output
signal by engaging the DC OFFSET switch (12) to enable
operation of the DC OFFSET control (5). Rotation of this
control adds a positive or negative DC component to the
output signal. The DC component introduced is
independent of the OUTPUT LEVEL control and can be
varied by ±10 volts open circuited or ±5 volts into 50 Ω.
The DC Offset does not affect the TTL/CMOS output
jack. The effect of DC OFFSET is shown in Fig. 3.
CONSIDERATIONS
l. Counterclockwise rotation of the FREQUENCY control
decreases the output frequency to approximately one-tenth
of the maximum for the range selected (10:1). For
example, if the 20K range is selected and the
FREQUENCY control is set to full counterclockwise (dial
setting of .2), the output frequency is approximately 2 kHz.
2. Clockwise rotation of the FREQUENCY control increases
the output frequency. At the fully clockwise setting (dial
setting of 2.0), the output frequency will be equal to the
RANGE selection. That is, when the 20K range is selected
and the dial is set to 2.0, the output will be 20 kHz.
3. When the dial is set to 1.0, the output frequency is one half
of the maximum for the range selected. When the 20K
range is selected and the dial is set to 1.0, the output will
be 10 kHz.
4. A more precise frequency setting may be achieved by
connecting an external frequency counter to the TTL or
output jack.
5. When outputting square waves or when using the TTL
output, terminate the cable into 50 Ω to minimize ringing.
Also, keep cables as short as possible.
11
OPERATING INSTRUCTIONS______________________________ _______________ _____________ ____________
DUTY CYCLE CONTROL
The DUTY CYCLE control can be used to alter the
symmetry of the output waveform, to produce waveshapes
such as those shown in Fig. 4. For a square wave, symmetry
variation amounts to changing the duty cycle (ratio of
"high" to "low" time), effectively converting the instrument
into a pulse generator. For a triangle wave, the result is a
ramp, and with a sine wave, a distorted waveshape called a
slewed sine is produced. The Model 4010A provides for
symmetry variation from 15% to 85%.
1. Select the waveform desired either SINE, SQUARE or
TRIANGLE.
2. Engage the DUTY CYCLE switch (14) and adjust the
DUTY CYCLE control (10) for the desired
waveshape. Clockwise rotation from center results in
an increase in square wave duty cycle, and changes the
sine and triangle waves as shown in the top waveform
of each pair of Fig. 4. Counter-clockwise rotation
results in the bottom waveform in each pair.
3. Varying the duty cycle setting results in a slight
change in frequency. Adjust the FREQUENCY
control as required.
Figure 4. Effects of Symmetry Variation.
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