Gen Func Protek B-810

8/13/2019 Gen Func Protek B-810

1/25

0


2/25

1

SWEEP FUNCTION GENERATOR

CONTENTS

I. GENERAL INFORMATION 1. INTRODUCTION.............................................................. 2

2. DESCRIPTION ................................................................ 2

3. FEA TURES ..................................................................... 3

4. SPECIFICATION ............................................................. 3

5. ACCESSORIES SUPPLlED ............................................ 4

6. ACCESSORIES A V AILABLE ....................................... 4

II. INSTALLATION 1. INTRODUCTION.............................................................. 5

2. PREPARATION FOR USE .............................................. 5

1) Power Requirements

2) Une Voltage and Fuse Selection

3) Operating Environment

3. STORAGE ENVIRONMENT ............................................ 6

III. OPERATION 1. INTRODUCTION..............................................................7

2. PANEL FEATURES .........................................................7

1) Front Panel Features ..............................................7

2) Rear Panel Features ............................................. 10

3. OPERATING INSTRUCTIONS ...................................... 12

1) Operating Precautions ......................................... 122) Counter (lNT/EXT) ................................................. 13

3) Basic Signal Generation (sine. triangle. square.

sync out).... ............................................................ 14

4) Trigger/Gate Mode ................................................ 15

5) Burst Mode ............................................................ 16

6) Sweep Mode .......................................................... 17

7) Symmetry .............................................................. 18

8) DC Offset/DC Out .................................................. 19

9) Amplitude Modulation .......................................... 2010) VCG Operation ..................................................... 22

11) Combination of Functions.......................................23

SECTION TITLE PAGE


3/25

2

SECTION IGENERAL INFORMATION

1. INTRODUCTION

This operating manual contains the information required to install and operate the SweepFunction Generator. Figure 1-1 shows the instrument and supplied accessories. This sectioncovers description, specifications, accessories and other basic information.

2. DESCRIPTION

This Sweep Function Generator is a 0.01 Hz to 10 MHz function generator, with internalcounter and external counter. This instrument generates a variety of waveformes, containing sine,square, triangle, ramp, and pulse signals. The frequency counters is built in 6 digit, high sevensegment yellow LED display. Because it provides such different operation modes as continuousgeneration, gate generation, trigger generation, burst wave generation, and sweep generation, itscan be used for diverse applications - for example, for frequency characteristic measurement ofaudio/video equipment and in the testing of automatic control devices.


4/25


5/25

4

4) Operation ModeCWTRIG/GATE

Frequency rangeInput voltageStartlstop phaseBURST

SWEEP

5) Output CharacteristicsOutput levelAttennuatorImpedanceDC offsetSYNC outputGCV output

SWEEP output

SWEEP/BURSTGATE out

6) Amplitude Modulation (AM)Modulation level

Input signallevel

: Continuous generation: TRIG: One cycle oscillation triggered by input signal

GATE: Oscillation only when input is HI: 0.1 Hz-1 MHz: TTL level (DC to 100 KHz): Variable: Burst wave oscillation for gate time of 1 ms to 10s by built-in

oscillator.ON/OFF time is symmetrical and variable.

: Sweep mode: selection of linear and logarithmic sweepsSweep time: 1ms to 10s, 2 range, continuously variable.

fly-back line interval is symmetrical and variable.Sweep width: Max. 1: 100, continuously variable.

(sweep start frequency can be specified.)

: 20 Vp-p (open circuit): O, 20, 40, 60 dB, continuously variable.

: 50 10%: Max. 10V (open circuit): TTL level (duty cycle are symmetrical and variable): Voltage output in proportion to frequency, O to 5V (MAX.frequency in each range)

: Sweep output in sweep mode, 0 to - 5V

: TTL level

: 0 to 100%, continuously valiable.

: Max. 5 Vp-p suppressed-carrier mode.

7) VCG (External Control of Frequency)

Frequency rangeInput level

8) Power Requirements9) Size and Weight

10) Time Base

: Max. 1000: 1, with frequency is dial set to "10"

: 0 to - 5V ( 20%), frequency is decreased by negative voltage

: 1001120/220V 10%, 240V + 5, -10% (48 to 66 Hz): 300(W) x 98(H) x 300(0) mm Approx. 4 Kg: Frequency: 10 MHzAging rate: 3 x 10-5/month

Temperature: 1 x 10-5 for 0C-40C

5. ACCESSORIES SUPPlIED

The Fig. 1-1 shows the Sweep Function Generator, power cord and fuses.

6. ACCESSORIESA V AILABLE

BNC to BNC Coxial Cable (Length 1 m: 1 EA)


6/25

5

SECTION IIINSTALLATION

1. INTRODUCTION

This seetion provides installation instruetions with this Sweep Funetion Generator. Theseetion also includes information on preparation for using the Sweep Funetion Generator andstorage.

2. PREPARATION FOR USE

1) Power Requirements.

This Sweep Funetion Generator requires a power souree of 100, 120, 220 Volts ac 10%, or

240 Volts ac 5% - 10%, 48 to 66Hz single phase.

WARNING

IF TI-US INSTRUMENT IS TO BE ENERGIZED VIA AN EXTERNAL AUTO TRANSFORMERFOR VOLTAGE REDUCTION, BE SURE THAT THE COMMON TERMINAL IS CONNECTED

TO THE NEUTRAL POLE OF THE POWER SUPPL Y.

2) Line Voltage and Fuse Selection

CAUTIONBEFORE TURNING THE SWEEP FUNCTION GENERATOR UNE SWITCH TO ON, VERIFY

THAT THE INSTRUMENT IS SET TO THE VOLTAGE OF THE POWER SUPPUED.

Figure 2-1 provides instruetions for line voltage and fuse seleetion. The line voltage seleetion andtne proper fuse are faetory installed for the voltage appropriate to instrument destination.

CAUTIONUSE PROPER FUSE FOR UNE VOL T AGE SELECTED.


7/25

6

Operating Voltage Fuse

100 Vac or 120 Vac 1 A 250V

220 Vac or 240 Vac 0.5A 250V

Fig. 2-1. Voltage and Fuse Selection

CAUTIONMAKE SURE THAT ONLY FUSES FOR THE REQUIRED RATED CURRENT AND OF THESPECIFIED TYPE ARE USED FOR REPLACEMENT.

3) Operating Environment

(1) Temperature. The instrument may be operated in temperatures from OOC to + 40C.(2) Humidity. The instrument may be operated in environments with relative humidities to85% to

40C. However, the instrument must be protected from temperature extremes which causecondensation within the instrumento

3. STORAGE ENVIRONMENT

The instrument may be sto red or shipped in environments within the following limits. .

Temperature : - 20C to + 70C

Humidity : below 85% RH

SELECTION OF OPERATINGVOLTAGE

1. Disconnect power cable.

2. Pul! the fuse holder out.

3. Select operation voltage byorienting Fuse holder to positiondesired voltage according to ' ' mark on the AC INLET.

4. Re-insert the fuse holder in ACINLET, be careful to selectcorrect fuse value.

Operating voltage isshown on the cover offuse holder and, isusually set to 1 20V atfactory.


8/25

7

SECTION III OPERATION

1. INTRODUCTIONThis section provides the operating information to acquint the user with this SweepFunction Generator. The section incJudes panel features, measurement procedures forvarious applications.

2. PANEL FEATURES

The front panel and Rear panel are shown in Figure 3-1 and Figure 3-2. Descriptionnumbers match the numbers on the figure.

1) Front Panel Features


9/25

8

(1 ) Power Switch Applies or Removes AC Power.Press the switch to turn the power ON -the counter display LED willlight. Press againto turn the power off.

(2) Counter Display LED (6 Digit Seven Segment Yellow Color)

(3) Freq. Range Switch

This switch provides range selection for output.

(4) Freq./Stop Freq. (Hz) Dial

This is used to control the frequency of the output (9). The operating frequency is determined

by the multiplying the dial reading by the FREQ. RANGE (3) setting. With the MODE (5) set to

SWEEP, this dial indicates the frequency at sweep end.

(5) Mode SwitchThis switch is used to select one of five generation modes: CW, TRIG, GATE, BURST,or SWEEP.

(6) Function SwitchesThese switches change the waveform of the output (9) to sine, triangle, or square wave. If allthree switches are released ( ), DC voltage can be obtained by using the DC OFFSET (7)control.

(7) DC Offset Control (Pull-On)This is used to superimpose DC voltage on the output (9). Pull this knob to use this function,and push it if superimposition is not necessary.

(8) Attenuation (dB) Variable ControlThe outer knob controls the attenuation of the output (9) by O, 20, 40, or 60dB. The innerVARIABLE knob is used to adjust the output level continuously. With DC OFFSET setting toON, the outer knob is used to adjust DC voltage together with the output; however, DC voltagecannot be varied by using the inner VARIABLE knob.

(9) Output TerminalThis output terminal has an impedance of 50 ohms. When terminated with 50 ohms, theterminal generates signals of 10 Vp-p (max.). (except for output with amplitude modulation)

(10) TRIG Start Level ControlThis is used to specify start level when the MODE (5) is set to to TRIG, GA TE, or BURST.

(11) Symmetry Control (Pull-On)Pull and turn this control knob to adjust the waveform symmetry of the output (9) and SYNCOUT (12) in the range of 20:80 to 80:20. When the control knob is pressed, the twowaveforms are symmetrical.

(12) SYNC Out TerminalThis is a TTL level output terminal (with an impedance of 50 ohms) with a 1800 phasedifference from that of the output (9). The symmetry of the output can be adjusted by usingthe SYMMETRY control (11). This terminal is used for synchronization with an externa Imeasuring instrument, TTL signal output, and checking the operating frequency by using a

counter.


10/25

9

(13) TRIG IN Terminal

This is the input terminal for trigger/gate signals when the MODE (5) is set to TRIG orGATE. TTL level input signals are used.

(14) Counter Selector SwitchPress the switch ( ) to external counter.Press again ( ) to internal counter.

(15) External Counter INCounter input connector for the external signal input.

(16) AM Switch (ON , OFF )Press this switch ( ) for amplitude modulation. The MOD IN terminal (17) is used to inputmodulation signals.

(17) MOD IN Terminal

This is the input terminal for amplitud e modulation. It provides an input impedance of about10k ohms, a frequency range of DC to 1 MHz, and a maximum input voltage of 1OV (AC +

DC)

(18) LOG ( ) /LIN ( ) Switch

With the MODE switch (5) set to SWEEP, the LaG/UN switch enables logarithmic sweep orlinear sweep to be selected.

(19) SWEEP ( )/SET START ( ) Switch

This switch is used to set the sweep start frequency with the MODE (5) set to SWEEP. Whenthe switch is pressed ( ) for SET ST ART, the sweep is stopped at the sweep start

frequency. Then, connect the generator output to a frequency counter or oscilloscope, andspecify a sweep start frequency by using the START knob (20). After the frequency is set,the sweep can be resumed by setting the switch to SWEEP ( ). The sweep stop frequencyis set by using the FREQ. dial.

(20) Start/MOD Level Control

This is used to set the sweep start frequency and to change the amplitude modulation level.

(21) Time 0.1-10s ( )/1-100ms ( ) Switch

This switch is used to switch the time ranges for burst gate or sweep when the MODE switch(5) is set to BURST or SWEEP.

(22) AM Carrier Level Control

This is used to adjust carrier levels for amplitude modulation. With a setting around "O",carrier waves are suppressed and a double sideband (DSB) is obtained.

(23) Symmetry (Pull-On)/Variable

Variable (outer knob):This is used to adjust the burst/sweep time continuously in the range selected by theTIME switch (21 '). Turning the VARIABLE counterclockwise decreases the time.

Symmetry (pull-on) (inner knob):Pull out to adjust the ON/OFF time for a burst and sweep time (both ways). When this

knob is pushed in, the time ratio is 50: 50.


11/25

10

2) Rear Panel Features

(24) GCV OUT TerminalThis terminal outputs a DC voltage in proportion to the oscillation trequency. The outputimpedance is about 600 ohms and the output voltage is 0 to 5V (with the FREO. dial set to"10" )in the trequency range selected by the FREO. RANGE control (3).

(25) SWEEP OUT TerminalThis terminal is used tor sweep generator output. The output time and symmetry can beadjusted by using the TIME switch (21) and SYMMETRYNARIABLE control (23).

This output ignores the MODE switch (5) setting and can be used as an X-axis signal tor anoscilloscope, or as a VCG signal.


12/25

11

(26) SWEEP/BURST GATE OUT TerminalThis is the gate signal (TTL level) output terminal for the sweep/burst mode. Fig. 3-3. showsthe relationship between signals and time.

(27) VCG IN TerminalThis is input terminal used to externally control the frequency of the output from terminals(9)and(12). A negative voltage applied to this terminal decreases the frequency, and apositive voltage increases it. With the FREQ. di al set to "10", negative voltage is applied to

decrease the frequency to 1/1000 (maximum frequency ratio). The maximum input voltage is+ 10V (AC + DC).

(28) Fuse HolderProper ampere fuse must be in compartment.

(29) Voltage Selector

Proper line voltage must be selected where this generator is used.

(30) Receptable for AC Une Cable

(31) Grounding Terminal

This is connected to the main frame.


13/25

12

3. OPERATING INSTRUCTIONS

1) Operating Precautions

(1) Precautions for Input Voltaje

All input and output terminals are con'nected for direct coupled circuitry. Do not apply external

voltage to any output terminal. The output terminal (9) provides a maximum instantaneousinput voltage of 5V (AC + DC). Consequently, if the voltage applied to the terminal exceedsthis value, thE( internal circuitry wil! be damaged.

Also, take care to prevent input voltage exceeding the maximum input voltage value frombeing applied to the input terminals.

(2) Output Connections

The output terminal (9) has an output impedance of 50 ohms. Use a 50-ohm coaxial cable anda 50-ohm terminator for the output to obtain the proper attenuation and better frequencycharacteristics.

(3) Grounding Requirements

For the safety of operating personnel, the instrument must be grounds. The offset pin on thepower cable grounds the instrument when plugged into the proper receptacle.


14/25

13

2) Counter (lNT / EXT)

(1) Display FeaturesA. GATE indicator: Displays the opened or closed state of the GA TE.

When gate is open, indicator will be lit.B. OVERFLOW indicator

C. KHz annunciatorD. Hz annunciatorE. GA TE time selector switch (EXTERNAL COUNTER): 0.01 S, 0.1 S, 1 S, 1 OS switch

selectable

(2) Operating CharacteristicsA. Internal counter: The Fig. 3-1 selector switch (14 . ) is generator ranged frequency

with the switch remained and reading.B. External counter: The Fig. 3-1 selector switch (14) press the external frequen

cy to the ON position.

C. External counter IN (15 BNC) characteristicsC-1. Frequency range: 0.1 Hz to 10 MHzInput sensitivity: 5 O mv rmsImpedance: approx,1 MO less then 35pFMax input voltage: 250V (DC + AC rms)

C-2. GATE time: 0.01 S, 0.1 S, 1 S, 10S switch selectable0.01 S: 10Hz resolution0.1 S: 10Hz resolution1 S: 1 Hz resolution10S: 0.1 Hz resolution

(3) Wait about 20 minutes for correct measurement until the crystal oven generator getsstable in aging.


15/25

14

3) Basic Signal Generation (Sine, Triangle, and Square Waves)

The panel control settings required to generate sine, triangle, or square waves continuously, and to vary the output frequency manually are as follows.

Panel controlMODE (5)FUNCTION (6)

AM (16)SYMMETRY (11)FREQ. RANGE (2)FREQ. DiAL (4)DC OFFSET (7)ATTENUATION (8)

SettingCW

OFFUsed if necessaryDesired rangeDesired positionUsed if necessaryDesired range

(1) Sine Wave Output

The Total Harmonic Distortion (THD) of themain sine wave, including spurious and

harmonics, is less than 0.5% from 10 Hz to 50kHz. The modulation sine wave distortion isles s than 2% THD from 10Hz to 10kHz.

(2) Square Wave OutputThe RMS value of a symmetrical (50% dutycycle) square waveform is equal to its peakvalue. The rise or fall time is less than 25nanosBconds betwBBn the 10% and 90%points of the p-p output square wave. The

aberrations, or deviations from the finalsettling amplitude of the square wave afterovershoot, will not vary more than 10% ofthe final value.

(3) Triangle Output

The RMS value of the triangle waveform is0.557 times the peak value. The triangle rampwill not deviate from a straight line any morethan 1 % of the total peak-to-peak value of theramp. Non-linearity s, therefore, negligible.

(4) SYNC Output

The SYNC output supplies a one voltrectangular wave which is 1800 out of phasewith the main generator output signal. Theleading edge and the trailing edge of theSYNC pulse occur at the zero crossing pointof the output waveform. The frequency andduty cycle of this pulse vary with the mainoutput signal.


16/25

15

4) Trigger/Gate Modes

Set the panel controls as follows to use the trigger or gate mode for signal generation.

By using these settings and the TTL signal input to TRIG IN (13), one of the waveforms shownin Fig. 3-8 is output to the OUTPUT (9) connector.

Panel controlMODE (5)FUNCTION (6)

AM (16)SYMMETRY (11)TRIG ST ART LEVEL (10)FREQ. RANGE (2)FREQ. DiAL (4)DC OFFSET (7)ATTENUATION (8)

SettingTRIG or GATEDesired setting

OFFDesired settingIndex upDesired rangeDesired positionUsed if necessaryDesired range


17/25

16

In the trigger or gate mode, the output signal frequency range from 0.1 Hz to 1 MHz and tr iggerinput frequency range is DC to 100kHz.(TRIG ST ART LEVEL control)Fig. 3-8 shows the output waveforms obtained with the TRIG ST ART LEVEL (10) set in themiddle. The TRIG START LEVEL is turned to adjust the level to start signal generation.

Fig. 3-10 shows the waveforms called Haver sine waves and Haver triangle waves which areused as trigger signals.

5) BURST Mode

The instrument has a built-in burst gate oscillator used to generate burst waves during a cycleof 1 ms to 10s. The ratio of generation time and generation stop time can be adjusted bypulling and turning the inner knob of the SYMMETRY control (23). The panel control settings

for the BURST mode are as follows.


18/25

17

Panel controlMODE (5)FUNCTION (6)AM (16)SYMMETRY (11)FREO. RANGE (3)FREO. dial (4)DC OFFSET (7)TRIG ST ART LEVEL (10)SET START/SWEEP (19)TIME (21)SYMMETRYIVARIABLE (23)ATENUATION (8)

SettingBURST

OFF

Pushed in

Desired range

Desired position

Used if necessary

Index up

SWEEP ( )Desired range

Desired position

Desired range

Fig. 3-9 shows an output burst waveform. The trigger start level can be changed by using thesame procedure as in Trigger/Gate Modes.

6) SWEEP ModeThe sweep mode allows a linear or logarithmic sweep to be made at a sweep rate of 1 to

1: 100 in a specified frequency range. The sweep time can be set from 1 ms to 10s. Use theSTART IMOD LEVEL control (20) to set the sweep start frequency and the FREO. dial (4) toset the sweep end frequency.The panel control settings for the sweep mode are as follows.


19/25

18

Panel controlMODE (5)FUNCTION (6)AM (16)SYMMETRY (11)FREO. RANGE (3)FREQ. dial (4)DC OFFSET (7)

SET START/SWEEP (19)

TIME (21)SYMMETRY (23)VARIABLE (23)LIN / LOG (18)ATTENUATION (8)

SettingSWEEP

OFF

Pushed in

Desired range

At desired sweep end frequencyUsed if necessary

SET START ( )(SWEEP , after a sweep startfrequency setting)Desired rangePulled and turned fully clockwiseDesired timeDesired settingDesired range

To set a sweep frequency range, connect a frequency counter or oscilloscope to the OUTPUT

.(9), turn the FREQ. dial (4) to specify the sweep end frequency, and then specify a sweepstart frequency by using the ST ART /MOD LEVEL control (20). After the frequency rangesetting is made, the sweep is started when the pressed SET START / SWEEP switch(19) is pressed again and released ( ).Fig. 3-12 shows the waveforms and their relationship.

When a sweep start frequency has been specified by using the SET ST ART switcha sweep is started by pressing the switch. The sweep is ended at sweep completion.

7) Symmetry

The symmetry of output waveforms can be varied by using the SYMMETRY control (11).When the control knob is pressed, output waveforms have a symmetry of 50: 50. If the controlknob is pulled out and turned, the symmetry can be adjusted in a range from 20:80 to 80:20.The frequency range is limited to 1 MHz or less for symmetry control.


20/25

19

Note: When SYMMETRY control is activated, output frequency fluctuation is increased.

8) DC OFFSET / DC OUTThe DC offset function enables superimposition of DC voltage on output waveforms.Superimposed voltage is limited to the waveform peak + DC with :t 5V when the output isterminated at 50 ohms. Without this termination, the voltage must be within :t 10V. If allFUNCTION switches (6) are released (pushed out), only the DC voltage is output. The DCoffset function is activated by pulling the DC OFFSET knob (7) out. The knob must be turnedclockwise to superimpose a positive voltage; it must be turned counterclockwise tosuperimpose a negative voltage. The VARIABLE knob of the A TTENUA TION control (8)cannot be used to change the DC offset voltage, but can be used to change the amplitude of

output waveforms.

Note: The DC offset voltage is attenuated by the attenuator (O to 60dB). Even when theDC offset function is turned off, a residual offset voltage of 100mV (max.) remains.


21/25

20

The panel control settirg used to output DC Voltage only are as follows.

Panel controlFUNCTION (6)

FREQ. RANGE (3)DC OFFSET (7)A TTENUA TION (8)

SettingAII buttons released(Push all buttons out.)Range of x 1 00 or lessPull the knob0 dB

A max. of I: 100CV output can be obtained at an open output terminal by adjusting the DCOFFSET knob. Because the output impedance is set to 50 ohms, the relationship between theoutput voltage and max. load current is as shown in Fig. 3-15.

9) Amplitude Modulation

The instrument provides an amplitude modulation when an external modulation signal issupplied from the MOD IN terminal (17). The modulation signal frequency ranges from DC to 1MHz. The maximum input voltage required for full (100%) modulation is 5Vp-p. The inputimpedance is about 10 kohms. The control panel settings used for amplitude modulation areas follows.

The extent of the amplitude variation is expressed as the percentage of modulation. Thefollowing formula defines the relationship between Fc and Fm (see Fig. 3-16)

Panel controlMODE (5)FUNCTION (6)AM (16)SYMMETRY (11)

FREO. RANGE (3)FREQ. dial (4)DC OFFSET (7)AM CARRIER LEVEL (22)MOD LEVEL (20 )

SettingCW

ONPressed

Desired rangeDesired positionUsed if necessaryDesired levelDesired modulation level


22/25

21


23/25

22

10) VCG Operation

The VCG (voltage controlled generator) provides output frequency control through theapplied voltage to the VCG IN terminal (27). By applying a voltage of Oto 5V to the VCG INterminal, a frequency of up to x 1000 can be obtained (The frequency multiplication of 1000requires the FREQ. dial setting to "10" and an input voltage of - 5V.)The frequency modulation can be achieved by sending a modulation wave to the VCG INterminal. The input impedance is about 10k ohms.Fig. 3-19 shows the relationship between the VCG IN voltage and output frequency.

When for example, the frequency range is set for x 1 k with a FREQ. dial reading of "10"(10kHz), and - 2V is applied to the VCG IN terminal, the output frequency is 6kHz indicated by

the dotted line in Fig. 3-15.

Note: Note that noise in the DC voltage or modulation signal supplied to the VCG IN maycause undesirable frequency modulation.


24/25

23

11) Combintation of Functions

(1) Gated SepGated sweep operation can be provided when SWEEP OUT (25) and SWEEP/BURST GATEOUT (26) are connected as follows:

Panel controlMODE (5)FUNCTION (6)AM (16)SYMMETRY (11)FREQ. RANGE (3)FREO. dial (4)

DC OFFSET (7)SET ST ART ISWEEP (19)

TIME (21)SYMMETRY (23)VARIABLE (23)ATTENUATION (8)TRIG START LEVEL (6)

SettingGATE

OFFPressedDesired rangeDesired position(sweep end frequency)Used if necessarySWEEP ( )Desired rangePulled and turned clockwise fullyDesired time settingDesired rangeMiddle

The sweep end frequency is set by the FREO. RANGE control (3) and FREO. dial (4).When a sweep start frequency is to be changed, use external amplitude control (negativevoltage) for the SWEEP OUT output.


25/25

(2) Output voltage sweep operation

An output voltage sweep is made by using the amplitude modulation of the SWEEP OUToutput (25). Fig. 3-21 shows the required connections for this operation.

See Section 9) Amplitude Modulation for details on the modulation factor adjustment.

Documents

Gen Func Protek B-810