313-EE Lectuer-1 Function Generator

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2/12/2011

313 EE- ELECTRONICS LAB

ELECTRICAL ENGINEERING DEPARTMENT

COLLEGE OF ENGINEERING

AL-MAJMAAH UNIVERSITY

FUNCTION GENERATOR : DESCRIPTION / MODE OF

OPERATION



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FRONT PANEL DESCRIPTION

1. POWER SWITCH: Push the switch "ON" will light the LED of the digits (14) to indicate

power "ON".

2. FREQUENCY: Turn the switch to set the desired frequency generated.

This knob is for micro - adjust.

3. SYNCHRONOUS OUTPUT: The BNC synchronous output the TTL level square

wave signal, the output frequency as MAIN output.

4. SWEEP OUTPUT: Sweep signal output BNC. It will operate individually

whether the instrument was under sweep mode operation or not, Output

impedance 1k, output amp. 10Vp-p, output signal: Linear or Log.

5. MAIN OUTPUT: Function wave signal output BNC, Max. Output impedance

50 Max. Amplitude 20Vp-p (Non load).

6. AMPLITUDE: Turn the switch to adjust the output signal amplitude.

Pull out the switch to attenuate the output 20 times.(or -26dB)

7. DC OFFSET: The switch will set at OFF position in normal operation.

When use for BIAS circuit, pull "ON" the switch and turn to adjust DC offset voltage.8. SWEEP RATE: Turn the switch to adjust the sweep rate from 5sec to

10mS and the signal will output from (4). When pull the switch, the signal will

synchronous output from (4) and (5).

9. SWEEP WIDTH: The switch will effect only under switch (8) was "ON".

Turn the switch to adjust the sweep width. In normal position. It is Linear sweep

and it will be under Log sweep when pull out the switch.



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10. FUNCTION WAVE SELECTOR: Turn the switch to select the output wave

forms. Sine, Triangle, Square, DC, 4wave forms.

11. F R E Q U E N C Y R A N G E: T u rn t h e s w i t c h t o s e t t h e f r e q u e n c y o f t h e o u t p u t s i g

n a l . T h e f r e q u e n c y d i s p l a y o n ( 1 4 ) w i l l b e as t h e p r o d u c t o f t h e i n d i c a t e d d i g i t s b y

( 2 ) a n d ( 1 1 ). T h e f r e q u e n c y w i l l b e 1 0 time s d i f f e r e n c e o n e a c h s t e p . x 1 , x 1 0 , x 1 0 0 ,x 1 0 0 0 4 r a n g e s .

12. H z: T h e L E D l it me a n s t h e d i s p l a y u n i t s a r e " H z "

13. KH z: T h e L E D l i t me an s t h e d i s p l a y u n i t s a r e " K H z " .

14. L E D D I G I T S : 5 d i g i t s t o i n d i c a t e f r e q u e n c y g r n e r a t e d o r E X T i n p u t . T h e u n i t s w i l l

b e i n d i c a t e d b y ( 1 2 ) o r ( 1 3 ) s e l e c t e d b y C P U a u t o ma t i c a l l y .

15. E X T - C O U N T E R:

LED RED- indicates Ext. counter condition.

LED L i h g t - T r i g g e r l e v e l t o o h i g h .

LED D a r k - T r i g g e r l e v e l t o o l o w .

LED f l a s h - T r i g g e r i n g s t a t e .

16. D I S P LAY: I n d i c a t e t h e s o u r c e o f t h e f r e q u e n c y d i s p l a y b y ( 1 4 ) .

I N T H z / K H z - D i s p l a y t h e f r e q u e n c y o f t h e s i g n a l g e n e r a t e d b y t h e F G - 5 2 .

E X T H F - D i s p l a y t h e e x t e r n a l i n p u t h i g h f r e q u e n c y s i g n a l , S e t a t t h i s p o s i t i o n

t o s t r a i n o u t D C s i g n a l a n d l o w f r e q u e n c y harmon ic s i g n a l . I n p u t o n l y t h e e x p e c

t e d h i g h f r e q u e n c y s i g n a l .

E X T L F 1 0 0 K H z F i l t e r - D i s p l a y t h e e x t e r n a l i n p u t l o w f r e q u e n c y s i g n a l , S e t a t t

h i s p o s it i o n t o s t r a i n o u t t h e s i g n a l h i g h e r t h a n 1 0 0 K H z ma k e t h e l o w f r e q u e n c ys i gn a l mo r e s t a b l e .

17. R AMP / P U L S E: T u r n t h i s s w i t c h t o d i s p l a y R AMP w a v e f r om T r i w a v e a n d d i s

p l a y P U L S E f rom s q u w a v e . When a t p u l l I n v e r t p o s i t i o n , T h e d i s p l a y w i l l b e n e g

a t i v e R amp a n d n e g a t i v e P u l s e .

18. E X T - I N P U T : E x t e r n a l s i g n a l i n p u t B N C . T h e i n p u t f r e q u e n c y 0 . 2 H z t o 6 0MH z

, Ma x . i n p u t v o l t a g e 1 5 0 V rms (w h e n ( 1 7 ) w a s a t " P U L L " p o s i t i o n.

19. V C F - I N P U T : E x t e r n a l i n p u t D C s i g n a l t o c o n r o l t h e f r e q u e n c y g e n e r a t e d . E x

t e r n a l i n p u t A C s w e e p s i g n a l t o ma k e i t a s E x t e n a l s w e e p . E x t e r n a l i n p u t A C s i ne w a v e t o ma k e i t a s e x t e r n a l FM mo d u l a t i o n . I n p u t s i g n a l 0 1 0 V , < 1 K H z .

I n p u t imp e d a n c e - 1 K.



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Fig: 1 Front Panel / Control Panel The FG-52 is a super deluxe function Generator combined a 5 digits, high resolution

60MHz counter. The FG-52 is a rugged, easy to operate, excellent heat dissipation and

high stability instrument.

The FG-52 is 4 in 1 instrument

To be as Function Generator

8 wave forms selected by rotary switch instead of push-button to prevent mis-touch or

bad connection. Max. Output 20Vp-p (Non-load), and Mini. Output 0.1Vp-p (Non load).

To be as Pulse Generator

FG-52 provides positive pulse and reverse negative pulse output by Pull Reverse Switch,Max. Output 20Vp-p (Non-load). Frequency display by LED, pulse width from 0.4sec to

100ns.Can meets most of Audio, Video and other Basic electronic application

requirement.

To be as Sweep Generator

FG-52 provide linear sweep or log sweep selection switch to select the sweep mood.

Max. Sweep width 1:100 and sweep speed 5sec to 10ms. Also FG-52 provides VCF input

and synchronous Output Function. Convenient to operate.

To be as counter

FG-52 is a 5 digits micro-control counter. FG-52 provide Auto range, Auto gate time

and high resolution --0.001Hz, High input impedance --1M, High band width --0.2Hz60Mhz, High voltage resistance --150Vp-p features, Also, FG-32 provide Adjustable

Trigger ±2.5V with LED indicate. Display unit Auto - indicate, HF / LF selector,100Khz

filter.

To be as Dry Battery

FG-52 provides a DC Output function. The output voltage from +10V to -10 continuous

adjustable. Can be used as a low power DC source. Dry Battery



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1. TO BE AS FUNCTION GENERATOR

1) Push the power switch on and make sure that the LED of the 5 digits are lit.

2) Connect OUTPUT BNC of FG-52 to the CH1 input BNC of your Oscilloscope, and the

SYNC OUTPUT BNC to CH2, and set the trigger source of your oscilloscope at CH2.

3) Turn the FREQUENCY knob from x0.05 - x5.0 You will find the display of 5 digits LED

and oscilloscope will be changed slightly on each step. Turn the RANGE knob from x1

- x1000. You will find the display of 5 digits LED value will change 10 time on each

step and the oscilloscope too and then see (7) switch at Hz or KHz the display value

will be changed to x1 or x1000 too.

4) Turn the FUNCTION knob to select the wave form output to CH1 of your

Oscilloscope. CH2 will be TTL square wave only.

5) Turn the AMPL knob to adjust the amplitude of the signal output to CH1, and when

PULL out the switch, the amplitude will be reduced 20 times (-20dB) but the

display of CH2 (Sync output signal) will keep unchanged.

6) Turn the OFFSET knob. You will find both CH1 and CH2 will not changed. This switch

will operated only at PULL position. PULL out the offset switch and turn to set DC

offset voltage (from +10V to -10V) of the main output signal. But the sync output

signal will not affect.

Note: When the offset voltage are higher than the wave (+ or -)the display wave

form will be cut OFF



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2. TO BE AS SWEEP GENERATOR

1) Switch o n t h e F G - 5 2 a n d l i t t h e 5 d i g i t s L E D .

2) C o n n e c t t h e m a i n O U T P U T B N C t o t h e C H 1 i n p u t B N C o f y o u O s c i l l o s c o p e .

3) C o n n e c t t h e S W E E P O U T P U T B N C t o t h e C H 2 i n p u t B N C o f y o u r O s c i l l o s c o p e a n ds e t t h e t r i g g e r s o u r c e o f t h e o s c i l l o s c o p e a t C H 2 .

4) T u r n t h e S W E E P R A T E k n o b , t h e C H 2 o f t h e o s c i l l o s c o p e w i l l d i s p l a y a l i n e a r s a w -

t o o t h w a v e , t h e f r e q u e n c y w i l l b e v a r i a b l e f r o m 5 s e c t o 1 0 m S b y t u r n t h e s w i t c h .

C H 1 w i l l d i s p l a y t h e w a v e a c c o r d i n g t o t h e F U N C T I O N s w i t c h p o s i t i o n . P U L L o u t t

h e s w i t c h t o s e t " S W E E P O N " . t h e d i s p l a y o f C H 2 w i l l k e e p u n c h a n g e , t h e d i s p l a

y f r e q u e n c y w i l l b e v a r i a n t b y t u r n t h e k n o b s . B u t t h e d i s p l a y o f C H 1 w i l l b e s w e e p

w a v e , a n d t h e s w e e p s p e e d w i l l d e p e n d o n t h e s w e e p r a t e .

5) N O T EA f t e r " P U L L S W E E P O N " , t h e t r i g g e r s o u r c e o f t h e o s c i l l o s c o p e m u s t b e c h

a n g e d f r o m C H 2 t o C H 1 .6) T u r n t h e S W E E P W I D T H k n o b t o a d j u s t t h e s w e e p w i d t h b y t h e d i s p l a y o f C H 1 .

7) N O T EB e s u r e t h a t t h e S W E E P R A T E S W I T C H w a s a t " P U L L " p o s i t i o n . W h e n P U L L

o u t t h e s w e e p w i d t h s w i t c h , t h e s w e e p m o d e w i l l c h a n g e d f r o m l i n e a r t o l o g s w e

e p . T h e w a v e f o r m d i s p l a y o f C H 1 w i l l b e c o m e s l o g f o r m .

8) A M P L a n d F U N C T I O N k n o b s w i l l o p e r a t e a s G e n e r a t o r .

9) F r e q u e n c y d i s p l a y o n 5 d i g i t s L E D a s G e n e r a t o r , b e f o r e " P U L L S W E E P O N " . t h i s f r

e q u e n c y w i l l b e t h e s t a r t f r e q u e n c y . A f t e r " P U L L S W E E P O N " , t h e s w e e p c o n d i t i o

n i n c l u d e f r e q u e n c y , w a v e f o r m a n d s w e e p m o d e e t c . w i l l b e o b s e r v e d f r o m t h e C

R T o f t h e O s c i l l o s c o p e . T h e d i s p l a y o n L E D w i l l c o n t i n u o u s v a r i e t y .10) V C F I N P U T - - S e t t h e s w e e p r a t e s w i t c h a t " P U S H " p o s i t i o n t o s e t F G - 5 2 a t n o r m a l

g e n e r a t o r m o d e . c o n n e c t t h e s w e e p o u t p u t B N C t o V C F I N P U T B N C a n d c h e c k t h e

w a v e f o r m d i s p l a y o n t h e s c o p e C H 1 . t h e w a v e f o r m d i s p l a y w o u l d b e t h e s w e e p

w a v e . W h e n i n p u t a s i n e w a v e f r o m a n o t h e r g e n e r a t o r t o V C F I N P U T t o o b a e r v e t

h e F M d i s p l a y . B e s u r e t h e f r e q u e n c y o f t h e b a s i c w a v e ( F G - 5 2 ) a r e h i g h e r t h a n

t h e e x t e r n a l i n p u t s i g n a l .



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3. TO BE AS PULSE WAVE GENERATOR

1) P u s h t h e p o w e r o n a n d l i t t h e 5 d i g i t s L E D .

2) C o n n e c t t h e m a i n o u t p u t t o C H 1 .

3) C o n n e c t t h e S Y N C o u t p u t t o C H 2 a n d s e t t h e t r i g ge r s o u r c e o f t h e O s c i l l o s c o p e o n

C H 2 .

4) S e t t h e F U N C T I O N k n o b o n S q u w a v e p o s it i o n , a n d t u r n ( 1 1 ) k n o b t i l l t h e d i s p l a y

b e c o m e p l u s e w a v e f o r m y o u w a n t .

5) S e t t h e F R E Q U E N C Y a n d R A N G E t o t h e d e s i r e d f r e q u e n c y d i s p l a y o n ( 2 ) L E D .

6) P u l s e w i d t ht h e p u l s e w i d t h c a n b e a d j u s t a b l e b y k n o b ( 1 1 )

7) P u l l ( 1 1 ) k n o b t o d i s p l a y n e g a t i v e p u l s e p o s i t i o n a n d t e s t t h e n i g a t i v e p u l s e a s p

o s i t i v e p u l s e .

8) T u r n t h e A M P L t o a d j u s t t h e a m p l i t u d e o f t h e s i g n a l o u t p u t f r o m t h e m a i n o u t p u t

B N C ( 3 ) . T h e s i g n a l w i l l b e - 2 6 d B w h e n " P U L L " o u t t h e s w i t c h . B u t t h e s i g n a l o u t p

u t f r o m " S Y N C " o u t p u t B N C ( 4 ) w i l l n o t a f f e c t b y t h i s s w i t c h . t h e o u t p u t s i g n a l o f

" S Y N C " o u t p u t w i l l k e e p o n T T L l e v e l .

9) S e t t h e D C o f f s e t v o l t a g e b y p u l l o u t t h e " O F F S E T " s w i t c h a n d t u r n t o s d j u s t t h e D

C o f f s e t v o l t a g e f r o m + 1 0 V t o - 1 0 V



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4. TO BE AAS FREQUENCY COUNTER

1) S w i t c h o n t h e p o w e r s w i t c h , l i t t h e L E D d i g i t s .

2) D I S P L A YT h e c o u p l i n g p r o v i d e 4 s t e p s .

a. I N T / H zTo b e u s e d a s i n t e r n a l c o u n t e r f r o m 0 . 0 5 H z ~ 5 0 0 0 H z .

b. I N T / K H zT o b e u s e d a s i n t e r n a l c o u n t e r f r o m 0 . 5 K H z t o 5 M H z .

c. E X T H FT o u s e as Ex t e r n a l C o u n t e r f o r h i gh f r e q u e n c y ( 1 0 0 K H z t o 6 0 M H z )

d. E X T L FT o u s e a E x t e r n a l c o u n t e r f o r l o w f r e q u e n c y ( 0 . 2 H z 1 0 0 K H z ) .

3) C o n n e c t t h e E X T I N P U T B N C t o t h e e x t e r n a l s i g n a l s o u r c e , l i t t h e L E D

4) D i s p l a y u n i t T h e d i s p l a y u n i t e o f t h e F G - 5 2 w i l l b e o n H z o r K H z a u t o m a t i c a l l y c o

n t r o l l e d b y C P U.

313-EE Lectuer-1 Function Generator

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