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

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*** 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.

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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%

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(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

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[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

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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

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(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

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(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.

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(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

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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).

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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)

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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.

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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

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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

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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.

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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.

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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

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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.

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+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.)

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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.

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