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Protek B8110 user instruction manual
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lOMHZ SWEEP FUNCTION GENERATOR
B8ll0INSTRUCTION MANUAL
Protei<Test and Measurement
I Table of Contents ISECTION 1. INTRODUCTION 5
I-I. General Description 5
1-2. Special Features 5
1-3. Specifications 5
SECTION 2. OPERA TION 8
2-1. Description 8
2-1-1. Front Panel 8
2-1-2. Rear Panel 11
2-2. POWER CONNECTION 13
2-3. OPERATION 13
2-3-1. Normal Operation Procedure 13
2-3-2. Notes for General Operation 14
SECTION 3. OPERATING Instructions 15
3-1. Basic Signal Generation(Sine, Triangle, and Square Waves) 15
3-2. Sweep Mode 16
3-3. Trigger/Gate Mode 17
3-4. Burst Mode 18
3-5. Amplitude Modulation 19
3-6. Symmetry 20
3-7. DC Offset/DC Out 20
3-8. VCG Operation 21
3-9. Combination of Functions 22
- 1 -
*** CAUTION ***
I. Before using this instrument, read the instruction manual throughtly.
2. Before connecting the power cord, verify that line input voltage (11 O/220V) is properly set..
3. Use only a fast blow fuse. (AC 250V, O.5A)
4. Do not apply voltage to the output connector.
S. Do not apply voltage over IOVp.p to the input connector.
6. Do not use or keep the instrument in a location near heat sources or in a place subject to moisture.
- 3 -
SECTION 1. INTRODUCTION
1-1. General Description
The Model B8110 Function Generator generates a variety of waveforms, including sine, square, triangle, ramp,
and pulse signals over a frequency range of 0.0 1Hz to 10MHz.
Since it has a wide variety of features and functions, such as continuous" gated, triggered, burst wave, and
sweep, the B811 0 can be used for a diverse number of applications e.g., frequency characteristic
measurement of audio/video equipment, testing of automatic control devices, Ultrasonic, Audio research
1-2. Special Features
• O.OIHz to 10MH frequency range
• Gated and trigger modes.
• The B811 0 provides gated waveforms for a fixed period of time, and one cycle triggered signal with the
trigger point arbitrarily set.
• Burst waveforms.
• Linear/logarithmic sweep functions.
• VCG functions for external control of the output frequency.
• GCV function that generates a voltage proportional to the frequency.
• An amplitude modulation circuit with a suppressed-carrier.
• Variable waveform symmetry.
• DC offset function to superimpose DC voltage on an output waveform.
1-3. Specifications• Frequency Range O.OIHz tolOMHz in 9-decade range
• Waveform Sine, Square, Triangle, Ramp and Pulse
Sine-wave (Output) O.OIHz to 100kHz: Less than ±OJdB
100kHz to 10 MHz: Less than ± IdB
(Distortion) 10Hz to 40 kHz: Less than 0.5%
Square-wave Rise/Fall Time Less than 25ns (at m1Lx.output)
• Output (Level) 20Vp•p(lOVp•p into 50Q)
(Attenuator) OdB, 20dB, 40dB, 60dB and variable
(Impedance) SOQ ± I0%
- 5 -
(DC Offset) .
Symmetry Variation .
• Operating Modes
CW .
TRIG/GATE .
Gate .
Gate/Trigger Input Voltage .
Input Frequency· ············· .. · · ····· .. · ··
Start/Stop Phase .
BURST (Time) .
(Waveform Symmetry) .
SWEEP (Modes) .
(Time) .
(Width) .
• Outputs
SYNC .
GCY .
SWEEP Output .
SWEEP/BURST Gate .
• Amplitude Modulation .
AM Input Level .
• Yoltage Control Generator (YCG)
Freq. Range .
Input Level .
• Input Power .
• Dimension .
• Weight .
±IOY(±SY into SOQ load)
20:80 to 80:20 (from O.OIHz to IMHz)
Continuous wave output
One cycle or output for every input signal
Output waveform will be present when the input gate
input is High
TTL Level
DC to 100 kHz
Continuously Variable
Burst of preset waveforms for a period of time from
Ims-IOs
Yariable
Linear and Logarithmic
I ms-I Os, 2 range, continuously variable
Max. I: I00 continuously variable
(sweep start frequency can be specified)
TTL Level (Duty cycle are symmetrical and variable)
Voltage output is proportional to frequency
(from 0 toSY) (max. frequency for each range)
o to-SY in sweep mode
TTL Level
Oto I00% continuous variable
Max. SYp•p suppressed-carrier mode
Max. 1000: 1 with frequency dial set to "10"
Oto-SY(±20%) (Frequency is decreased with a negative
voltage.)
AC 110/220Y SO/60Hz
12.S"(W)X4.3"(H)X 14"(D), (320 x 110 x 360) mm
6.9 kg
- 6 -
[Remarks)
1. All specifications are applicable at a temperature of 23° ±5° and a relative humidity of 40 to 85%.
2. Unless otherwise stated, the frequency dial is set from I to 10, and SYMMETRY is OFF
- 7 -
MODE SWITCH
SECTION 2. OPERATION
2-1. Description
2-1-1. Front Panel
,
/@
Figure 2-1
(1) POWER Switch: Press (---) to tum the power on- on. Press again (..•.. ) to tum the power off.
(2) Dial indicator
(3) SYMMETRY (pull-on): In CW operation varies the duty cycle of the selected waveform ..
When this knob is pushed in, the duty cycle is 50%. This switch also is used for setting the Burst or
Sweep time when these modes are selected.
(4) BURST: Sets the output to burst mode
(5) SWEEP: Sets the output to sweep mode
(6) CW: Sets the output to CW mode
(7) GA TE: Sets the output to the gate mode
(8) TRlG: Sets the output to the triggered mode
- 8 -
(9) ~: Sine wave output
(10) -4v :Triangle wave output
(11) -% :Square wave output
} FUNCTION SWITCH
(12) SYMMETRY Control (pull-on) : Pull and tum this control knob to adjust the waveform symmetry of
the output and SYNC waveforms in the range of 20:80 to 80:20. When the control knob is pushed in, the
waveforms are symmetrical. (50% duty cycle)
(13) DC OFFSET Control (pull-on) : When this know is pulled out a DC voltage is superimposed on to
the output waveform. Pushing this knob in disables this function ..
Note: the Attenuator control (14) varies the Output level and its offset value accordingly and can not be used to
set the offset value
(14) ATTENUATOR (dB) : Sets the output signal attenuation to 0, 20, 40, or 60dB.
(15) Variable Knob: The Yariable knob is used to adjust the output level continuously.
(16) TRIG START PHASE Control: Sets the start level of the output signal when the MODE is set to
TRIG, GATE, or BURST. (See Figure 2-2)
TRIGSTART LEVELo•
'mIGSTART LEVELo•
Figure 2-2
'mIGSTART LEVELo•
(17) OUTPUT Connector: The signal output terminal with an impedance 50Q. When terminated in 50Q, the
output signals maximum amplitude is 0 to 10Yp.p
- 9 -
(IS) SYNC OUT Connector: A TIL level output signal with a 1800phase difference in respect to the output
signal. The symmetry may be adjusted with the SYMMETRY control (12) can be used for synchronization
with another measuring instrument, a TTL level signal output, and for monitoring the output frequency with a
counter.
(19) TRIG IN Connector: A TTL input terminal for inputting the trigger/gate signals when the MODE is
set to TRIG or GATE.
(20) MOD IN Connector: The input connector for the amplitude modulation signal with an input impedance
of approximately 10kQ and a frequency range of DC to IMHz. The maximum input voltage is ± 10V(AC or
DC). It is also the sweep output signal when the generator mode is set to sweep.
(21) AM Switch (ON---, OFF---): Press this switch (---) for amplitude modulation. The MOD IN
connector (20) is used to input modulation signals.
(22) AM CARRIER LEVEL Control: Adjusts the carrier level of an amplitude modulation signal. When
this control is set to approximately "0" the carrier wave is suppressed and a double sideband (DSB) AM
signal is generated.
(23) LOG(---)/LIN( ..•.. ) Switch: When the MODE switch is set to SWEEP, the LOGILIN switch selects
logarithmic sweep or linear sweep.
(24) SETIMOD LEVEL Control: Sets the sweep start frequency when in the Sweep mode and changes the
amplitude modulation level when in the AM modulation mode is selected.
(25) NORMAL (---)/START FREQ.(---) Switch: When Pressed (---) the sweep start frequency
may be set by the SET/MOD level control in the SWEEP mode. To set the start frequency,connect a frequency
counter or oscilloscope to the signal out and rotate the SET FREQ (24) control until the desired start frequency
is displayed on the Frequency counter or oscilloscope. After the start frequency is set, the sweep can be
resumed by returning this switch to the normal position (--- )(25) .
(26) TIMElY ARIABLE: Sets the burst/sweep time within the range of the TIME switch (27)
setting. Turning the VARIABLE CQUI1terclockwisedecreasesthetirne.
- 10 -
(27) TIME O.I-10s(---)/1-100ms(---)Switch: This switch is used to switch the time range for the burst
time or sweep time when the MODE switch is set to BURST or SWEEP.
(28) FREQ. RANGE Switch: Pressing this switch selects the appropriate range multiplier setting.
(29) Range multiplier indicator LED: Displays the frequency multiplier setting XO.OI, XO.I, x I, x 10,
x 100, x IK, X 10K, X lOOK, X I M. The Frequency dial (30) setting x the multiplier is equal to the output frequency
(30) FREQ./STOP FREQ.(Hz) dial: Sets the frequency of the output signal. The operating frequency is
determined by the multiplying the dial reading by the FREQ. RANGE (28) setting. When the MODE is set to
SWEEP, this dial indicates the sweep stop frequency ..
2-1-2. Rear Panel
Ie
Figure 2-3
(31) Fuse Holder
(32) Grounding Terminal: Frame grounding connection.
(33) Power Input Connector AC line cord is connected to this connector.
(34) Input Voltage Selector: Selects II OV or 220V AC input voltage.
(35) VCG IN Connector
- 11 -
A voltage applied to this input connector externally controls the frequency of the output signal. A negative
voltage applied to this connector decreases the frequency, and a positive voltage increases it. With the
FREQ. dial set to" 1O"(Maxiinum dial frequency) a negative voltage applied to the VCG IN connector will
decrease this frequency to 111000 of the original dial frequency. The maximum input voltage is ± IOV(AC
or DC).
(36) SWEEP/BURST GATE OUT Connector: Outputs a (TIL level) signal whose time is dependent on the
Sweep or Burst time. See figure2-4 for the relationship between Burst output, Burst signal Sweep signals and
Sweep time signals.
SWEEP OUTPUT
SWEEP OUI'PtJrWAVEFORM
BURST Omp\JI't-iAV EFORM
SWEEP/BURSTGATE OUI'PUT
. I II I II I II I II J I
~V\NI~ItWIjWI~I I I I II I I II : I I
Figure 2-4
or less
(37) SWEEP OUT Connector: Outputs a ramp signal depending on the sweep time (27) and the
SYMMETRYN ARIABLE control (3).~--~~~=:~Figure 2-5
This output ignores the MODE switch (4)to (8) setting and can be used as an X-axis signal for an oscilloscope,
or as a VCG signal.
(38) GCV OUT Connector: Outputs a DC voltage proportional to the selected CW frequency. The output
impedance is approximately 600.Qand an output voltage of 0 to ±SV (with the FREQ. dial set to" 1O")and
within the frequency range selected by the FREQ. RANGE control (28)and range indicator (29).
- 12 -
2-2. POWER CONNECTIONThe B811 0 was shipped from the factory set for 11OV AC/60Hz AC line voltage with a O.5A amp slow blow
fuse. To prevent damage to the instrument, check that the AC line switch is in the proper position and the
correct fuse type and rating is installed.
To set the AC line voltage, switch the AC selector switch (34) on the rear panel to the appropriate Line
voltage and check if the correct fuse is installed.
2-3. OPERATION• The number in circle 0 indicates the controls or connectors on the front or rear panel in figure 2-1 and
figure 2-2 .
• For example, the number (8) is the trigger button of mode selection.
2-3-1. Normal Operating Procedure
The normal operation procedure of function generator is as follows.
\. Mode Controls Select a mode with controls (4) to (8)
2. Output Wave form Select waveform with controls (9) to (11)
3. Output Frequency set with controls (28) and (30)
4. Output Level set with controls (14) and (15)
5. Controls that select the various Modes:
BURST (26), (27) and (3) (For normal operation, set (3)to "off".)
SWEEP (23),(24),(25),(26),(27)and (3) For normal operation, set (3)
to off.)
CW (6) and (12)
GA TE Input at (19) and set with control (16)
TRIG Input at (19) and set with control (16)
6. SYMMETRY
BURST/SWEEP Time (3)
rv , "v, I1.J (12)
7. DC Offset (13)
8. External Input
AM (20),(21),(22)and (23)
VCG Input Control Input at (35) and control (30)
- 13 -
2-3-2. Notes on Operation.
I. To check Frequency sweep with an oscilloscope, set to the time (23) to 1 -las (28) and the at neutral
position when used at sweep mode. Set and check the sweep time with an oscilloscope, Checking the sweep
time maybe difficult when the sweep time is set a short period of time.
2. Set the symmetry control push switch (3) and (12) to the "ofr' position when the B811 a is being used as a
function generator, Control (3) sets the on and off times of the Burst and sweep wave forms and control (12) sets the
waveform symmetry. Set the DC offset (13) to the "off' position and adjust control (13) after the initial setup
3. Input Voltage precautions:
All input and output terminals are direct coupled. Do not apply an external voltage to any output terminal.
The output terminal (17) provides a maximum voltage of ±5V (AC + DC). Consequently, if an external
voltage is applied to output terminal that exceeds this value, the internal circuitry will be damaged.
\6 I Output. terminaUBNC)oj- Do not apply exter.nal voltage
Figure 2-5
Also, take care to prevent input voltage exceeding the maximum specified input voltage value from being
applied to the input terminals.
4. Output COlmections
The output terminal (17) has an impedance of son. Use a son coaxial cable and a son terminator on the
output as shown in Figure 2-6 to obtain the proper attenuation and improved frequency characteristics.
oLoad> 50 ohm
Figure 2-6
5. Grounding
All grounding terminals for the input and output connectors are connected to the instrument chassis.
- 14 -
SECTION 3. OPERATING
3-1. Basic Signal Generation (Sine,Triangle,and SquareWaves)The front panel control settings required to generate a continuous sine, triangle, or square waves, and to vary
the output frequency manually are as follows.
Panel Control
MODE .
FUNCTION .
AM(21) .
SYMMETRY (12) .
FREQ. RANGE (28) .
FREQ. Dial (30) .
DC OFFSET (13) .
ATIENUATION .
OUTPUT(Variable) .
CW (6)
Select "v, "v or rtOFF
Used if necessary
Desired range
Set to the desired position
Use if necessary
Set to the appropriate attenuation
Adjust to the appropriate output Voltages
FUNCTION
FUNCTION
FUNCTION
SYNC OUT
~1V\J': II I
IIIIII
I I
~1IUl, II Ifirrr
Figure 3-1
- 15 -
A waveform selected by the FUNCTION
switches is present at the output when the
above settings are made. Figure 3-1 shows the
three available waveforms and their relationship
to the SYNC OUT waveforms in terms of time.
3-2. SWEEP MODEThe sweep mode allows a linear or logarithmic frequency sweep to be made with sweep widths of I to I: 100
within a specified frequency range.
The sweep time can be set from Ims to las. The SETIMOD Level control (24) sets the sweep start frequency
and the FREQ. dial (30) sets the sweep stop frequency. The front panel control settings for the sweep mode
are as follows.
Panel Control
MODE SWEEP
FUNCTION Select f'v, "'or ruAM (21) .......................................•........ OFF
SYMMETRY (12) Used if needed
FREQ. RANGE (28) Desired range
FREQ. Dial (30) Set for the sweep stop frequency
DC OFFSET (13) Used if necessary
NORMAL/START FREQ. (25) Press START FREQ.( ) in
TIME (27) Desired range
SYMMETRY (3) Pulled and turned fully clockwise
Time Variable (26) Desired time
LIN/LOG (23) , , Appropriate setting
ATTENUATION (14),(15) Desired range
To set the sweep frequency range, connect a frequency counter or oscilloscope to the OUTPUT (17),
tum the FREQ. dial (30) to set the sweep frequency, and then set the sweep start frequency by rotating the
SETIMOD LEVEL control(24). Figure 3-2 shows the waveforms and their relationship.
l;SWEEP/BURSTGATE OUTWAVEFORM
SWEEP OUTWAVEFORM
SWEEP OllTPUTWAVEFORM
UI I
III
I I I II I
WWI~MII 1 I
I T I I T2 iT I
"1
Figure 3-2
- 16 -
When a sweep start frequency has been specified by using the START FREQ. switch---, a sweep is started
by pressing the switch. The sweep is ended at sweep completion.
3-3. TRIGGER/GATE MODESSet the panel controls as follows to use the trigger or gate mode for signal generation.
Panel Control
MODE TRIG or GATE
FUNCTION Appropriate waveform
AM (21) OFF
SYMMETRY (12) Desired setting
TRIG Phase (LEVEL) (16) Indicator on dial in the center of rotation
FREQ. RANGE (28) Desired range
FREQ. dial (30) Desired position
DC OFFSET (13) Set if necessary
ATIENUATION (14), (15) Appropriate setting
By using these settings and the TIL signal input to TRIG IN (19), one output waveform shown in Figure 3·3 is
output to the OUTPUT (17) connector.
TRIG. ~INPt1I' J I
morON '" V' 1JI~--I iI I
FUNCl'ION "v ~ 0~---I JI II I
FUNCTION 'U Ul 1n~ _IoI
TRIGGER MODE(a)
~I I
'V \ (\ {\ rLJ (\ f\ fL~ V V -'0 V v···I :I I
"v ! 1\ 1\ 1\ : 1\ /\ I"L_'Nyy-vyy-I II I
'U U1nJLJJlIULI I
: I
GATE MODE
(b)
Figure 3-3
In the trigger or gate mode, the output signal frequency range is from 0.1 Hz to IMHz and trigger input
frequency range is DC to 100kHz.
- 17 -
TRIG START PHASE Control
Figure 3-3 shows the output waveforms obtained with the TRIG START PHASE (16) set in the middle. The
TRIG START PHASE control is rotated to adjust the start level of the output waveform.
3-4. BURST MODEThe B811 0 has a built-in burst gate oscillator used to generate a burst waveform for duration of 1ms to
lOs. The ratio of Burst- on time and the Burst-off time can be adjusted by pulling and rotating the
SYMMETRY control (3) knob. The front panel control settings for the BURST mode are as follows.
Panel Control
MODE BURST
FUNCTION rv, I\,,;or ruAM (21) OFF
SYMMETRY (12) Pushed in
FREQ. RANGE (28) Desired range
FREQ. dial (30) Desired position
DC OFFSET (13) Used if necessary
TRIG START LEVEL (16) Indicator on dial in the center of rotation
NORMAL/START FREQ. (25) SWEEP (-I) (out position)
TIME (27) Desired range (lOOms - 1s or 1S to lOS range)
TIME VARIABLE (26) Desired position
ATTENUATION (14), (15) Desired Attenuation
SWEEP/BORSTGATE OtJl'PUI'
BURST WAVEOUI'PUr I I I
I I I I II 11 .1. 12 I II .' T2I ' I' "'1I 1 I T I,- "'I· -I
Figure 3-4
Figure 3-4 shows an output burst waveform. The trigger start level can be changed by using the same
procedure as in Trigger/Gate Modes.
- 18 -
3-5. Amplitude ModulationThe 88110 provides amplitude modulation when an external modulation signal is applied to the MOD IN
tenninal (20).
The modulation signal frequency range is from DC to 1MHz with a maximum input for 100% modulation of
SYp_p. The input impedance is approximately 10kQ. The control panel settings used for amplitude modulation
are as follows.
Panel Control
MODE CW
FUNCTION tV, "vor ruAM (21) ON
SYMMETRY (12) Pressed
FREQ. RANGE (28) Desired Frequency range
FREQ. dial (30) Set to the appropriate Frequency
DC OFFSET (13) Used if necessary
AM CARRIER LEVEL (22) Set to the correct modulation level
MOD LEVEL (24) Desired modulation level
Carrier Level
Modulation Level
AM Waveform
A-BModulation Degree = A + B x 100%
Figure 3-5
If the AM CARRIER LEVEL (22) is set for approximately the center of rotation ("0"), a double sideband with
a suppressed carrier is obtained.
Double-sideband output waveform
Figure 3-6
- 19 -
3-6. SYMMETRYThe symmetry of the output wavefonns can be varied with the SYMMETRY control (12). When the control
knob is pressed in, the output wavefonn has symmetry of50:50. If the control knob is pulled out and turned,
the symmetry of the wavefonn may be adjusted in a range from 20:80 to 80:20. The frequency range is
limited to IMHz or less for symmetry control.
TRIANGLE ~1AVES YMl'1E:l'R Y
S(XJARE WAVESYMMETRY
SYMt1ETRYMin.
SYt1METRYCenter
Figure 3-7
SYMMETRYMax.
[Note] When SYMMETRY control is activated, the output frequency may change and has to be readjusted.
3-7. DC OFFSET/DC OUT
The DC offset function enables the superimposition of a DC voltage on to the output wavefonn. The Offset
voltage can only be added until the wavefonn peak is ±5V with out clipping if the output is tenninated in
50Q. With no tennination, the offset can be added until the wavefonn is ± IOV without clipping ( see fig 3-8).
If all function switches are released (pushed out), a DC voltage of the value set by the DC Offset control may
be obtained at the output connector.
The DC offset function is activated by pulling the DC OFFSET knob (13) out. When the knob is turned
clockwise a positive voltage is superimposed on to the wavefonn; if turned counterclockwise a negative
voltage is superimposed on the wavefonn. The VARIABLE knob of the ATTENUATION control US) cannot
be used to change the value of the DC offset voltage; it is used to change the amplitude of output of the
wavefonn plus DC offset voltage.
- 20 -
+IOV -FA- --- ----OV _ _ _ _
-lOY - --- --- ---
+IOV -7\-7\----------- ·+tOV ~---- -- ---
OV +-V-\r-----I\-A--- ov ------------------lOY '/._'1-_"'- __ -IOV M
DC OffSET OfF
(a)
+OFFs~r -OFFSET
(b)
Figure 3-8
-+OVEROFFSET
(c)
-avEROFFSET
The panel control setting used to output DC voltage only are as follows.
Panel Control
FUNCTION All buttons released (Push all buttons out.)
FREQ/ RANGE (28) Range of x 100 or less
DC OFFSET (13) Knob in the out position
ATTENUATION (14) OdB
A max. of ±IODCV output can be obtained when the output terminal is not terminated by adjusting the DC
OFFSET knob. Because the output impedance is son, the relationship between the output voltage and max. load
current is as shown in Figure 3-9.
10
Output voltage(v)
3-8. VCG Operation
5
o o
When max. output is lOV.
iOO
Max. load current (mA)
Figure 3-9
The VCG(Voltage Controlled Generator) provides output frequency control by applying a voltage to the VCO
IN terminal (35) By applying a voltage of a to 5V to the VCO IN terminal, a frequency of up to x 1000 can
be obtained. (The frequency multiplication of 1000 requires the FREQ. dial setting to be at "10" and an input
voltage of -5V.)
- 21 -
A frequency modulated signal can be achieved by applying the modulating signal to the VCG IN
terminal. The input impedance is approximately 10kQ. Figure 3-10 shows the relationship between the VCG
IN voltage and output frequency.
OlJI'PlJrFRE0.
0.010.1 When for example, the Frequency range is set for xl K
mE0.l)I l'JJ Graduation
to
6
6
2
0.1
veGINPUT (V)
-5
-4
2
8
to
with a frequency dial reading of 10 (lOKHz) and -2V is
applied to the VCG IN terminal, the output frequency is
6KHz as indicated by the dotted line in Figure 3-10.
Figure 3-10
[Note] Noise on the DC voltage or the modulation signal applied to the VCG IN may cause undesirable
frequency modulation.
3-9. Combination of Functions
Output Voltage Sweep Operation
An output voltage sweep is made by using the amplitude modulation of the SWEEP OUT output (37) Figure
3-11 shows the required connections for this operation.
PULL ON
oo~
Sweep Output Level
Figure 3-11
See Section 3-5 Amplitude Modulation for details on the modulation factor adjustment.
- 22 -