.


:




:

































 

 

 

 


: -




, . . , .

- () (, ) . (encoding), :

,

,

( )

..

 

() , . . , . , . , . . , , .

, . (, , ). (aliasing - ) - -.

PCM ENCODER ( ) Emona FOTEx

PCM Encoder , . , (codec), -2.5 +2.5 7- , 128 , 128 0000000 1111111.

8- (frame). ( 7), 6- .., ( 1). 0 , PCM Encoder . 0 1 . , .

PCM Encoder Frame Synchronisation (FS), , . FS FOTEx .

. 1 (PCM) , (Frame1, Frame2, Frame3), (Clock) (FS) . PCM 7 1 , , : 0‟ 1‟, .

 

1

 

 

PCM Encoder - ( ) : , , . .

:

NI ELVIS II USB-

Emona FOTEx

ѐ BNC - "" (2 )

ѐ "" (2 )

 

:

 

A -,

1. , NI ELVIS II , .

2. Emona FOTEx NI ELVIS II.

3. Emona FOTEx NI ELVIS II.

 

1: . , NI ELVIS II FOTEx.

2: FOTEx .

 

4. NI ELVIS II USB.

5. NI ELVIS II ( ), , .

6. .

7. NI ELVISmx.

8. Mode () PCM Encoder PCM.

9. , . 2

 

1: GND ()

2: INPUT 1 PCM Encoder GND.

 

 

2

 

-, . 3. (PCM Encoder) 10 kHz DIGITAL (Master Signals). 0 .

3

 

PCM Encoder , IN , CLK ,

Master Signals , FS To CH 0 0, PCM data , PCM clock To CH 1 1

10. (VI) Oscilloscope NI ELVIS II ().

11. , 1 :

Scale ( ) 2 /. 1 /.

Coupling ( ) DC ( ) AC ( )

Trigger Level ( ) 2 0 .

Timebase ( ) 200 /. 500 /.

12. Slope () ().

, , FS c . , Slope. , .

 

4

 

1: (FS) (. 4). .

 

2: .

 

14. 1 ( Channel 1 Enabled) (CLK) (FS) .

, . Vertical Position ( ) 0 2, 1 -5 .

15. , ( ), .

(CLK) , (FS) .

 

16. 1 PCM Encoder ( ), . 5.

! , .

5

-, . 6. 1 10 , . 8 , 2 .

6

 

IN , CLK , FS To CH 0 0, PCM data To CH 1 1

17. , .

 

B -

(0 ) . , , .

18. Emona VarDC ( ).

 

: Emona VarDC NI ELVIS II, DAC0 FOTEx.

 

19. , Emona VarDC VI .

20. Emona VarDC 0 .

21. .

22. , 7.

 
 


7


-, 8. Emona VarDC VI .

8

 

23. 7- .

1: .

2: , 0 .

 

: , , , , , .

 

24. Emona VarDC VI , , .

25. , 00000000.

26. 1.

1

   

27. Emona VarDC 0 .

28. Emona VarDC VI , , .

 

C

, , , .

31. VarDC.

32. DAC0.

33. . 9.

 

9

 

-, VarDC 2kHz SINE , .

, 100 . , (aliasing), . , , , , . 10 1250 , 4000 /, 2 . 100 12500 /, .

 

 

 

. 10

Master Signals , IN , CLK , FS To CH 0 0,

PCM data To CH 1 1

48. .

 

 


4





:


: 2016-12-05; !; : 842 |


:

:

, , .
==> ...

1518 - | 1432 -


© 2015-2024 lektsii.org - -

: 0.028 .