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8/7/2019 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.