- (), (). .
:
.
.
, .
, (.. , - ).
.
- , , , - .
- (PCM Endoder) - (PCM Decoder) . , . - , . , , , . ( PCM Decoder Emona FOTEx) , -. "" PCM Enoder, .
. () . (frame synchronisation), . - , ( ). (), . , - Emona FOTEx , . , , .
. () . (frame synchronisation), . - , ( ). (), . , - Emona FOTEx , . , , .
|
|
FOTEx. (PCM Encoder), (PCM Decoder) Emona FOTEx 8- , 0 , . 0000000 -2 , 1111111 +2 . , 2 . , 1000000, 0000000 1111111, 0 ( +2 -2 ).
Emona FOTEx . , ( ). . , , . , .
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. Variable Power Supply ( ).
9. Variable Power Supply 0 .
10. Mode PCM Encoder PCM ().
11. , . 1.
1
: (GND).
-, . 2. 100kHz DIGITAL ( 100 ) (Master Signals). (Variable Power Supplies).
2
Variable Power Supplies - , IN , CLK , FS To CH 0 0,
PCM data To CH 1 1, Master Signals
12. (VI) Oscilloscope NI ELVIS ().
13. , 1 ( 15) :
Scale ( ) 2 /. 1 /.
Coupling ( ) DC ( ) AC ( )
Trigger Level ( ) 2 0 .
Timebase ( ) 10 /. 500 /.
14. Slope () - ().
15. 1 ( Channel 1 Enabled) (PCM DATA) (FS).
16. Voltage (Variable Power Supplies), 2.5 .
: , , . , .
17. Variable Power Supplies ( ).
18. .
19. Function Generator ( ).
20. :
Waveshape ( ): Sine () Frequency (): 500
Amplitude ( ): 4
DC Offset ( ): 0
21. . 3.
! , .
3
-, . 4. (PCM Encoder) 500 (Function Generator). PCM DATA (-).
4
Function Generator , IN , CLK ,
FS To C 0 0,
PCM data To CH 1 1.
B
, -, Emona FOTEx PCM Decoder (-).
22. 1 .
23. . 5.
5
-, . 6. , "" .
|
|
6
PCM Encoding - : Message To CH 0 0,
IN , CLK
PCM Decoding - : PCM data - ,
"Stolen" CLK , PCM Decoder ,
Output To CH 1 1
24. :
Scale ( ) 1 /.
Vertical position ( ) 0
Coupling ( ) AC ( ) Trigger Level ( ) 0
SLOPE () + ().
Timebase ( ) 500 /.
25. 1 , (PCM Decoder).
, PCM Encoder (-) PCM Decoder (-) . - . , - ( 0) . , 0 1 .
, 101010 . , - . , .
? , ( , ) , . , , , . .
-
( ) , . , , .
, , (Dynamic Signal Analyzer), . NI ELVIS II , -.
26. , Stop.
: , . , , .
27. .
28. NI ELVIS II Dynamic Signal Analyzer ( ).
: , , . 7.
7
29. : Input Settings ( )
|
|
30. Run .
1: , , . 8.
2: NI ELVIS II , D .
8
. ( , ). , -, 25.
. , , . , , , .
31. -
: , .
, NI ELVIS II .
32. , Cursors On ( ).
: , .
NI ELVIS II , 1 2, . , "" .
33. 1.
: , 1 , , .
34. 33 2.
: Position () Cursor Setting ( ), .
NI ELVIS II , ( ) . .
35. , .
36. .
: .
, 0 . , , ,
37. 1 .
38. 2 -.
39 , .
. , ( ), , , . ( ) , 0 . , . , . , -10 , 0.3 . -20 0.1 , -30 0.03, -40 . 0.01 .
40. 2 - .
: 2 , .
4 -
, -. . , , - ( ) .
|
|
41. Frequency Span ( ) 15000 .
42. 2 500 .
: ( ).
43. ( ) 1 .
44. 2 , - 1 .
45. , Stop ().
46. , Run ().
47. .
48. 2 .
: , Timebase ( ) 100 /.
49. 3 .
50. .
51. .
52. 2, .
- , ( , ). (aliases). . "" -.
53. 500 .
54. Frequency Span ( ) 40000 .
55. 2 , : 12 13 , 24.5 25.5 , 37 38 .
.
56. , 9.
9
-, . 10. 3 .
10
PCM Encoding - : Message To CH 0 0, IN , CLK
PCM Decoding - : PCM data - , CLK , Reconstruction : 3kHz LPF 3 ,
Recovered message To CH 1 1
57. 2 (. 55).
58. .
59. Timebase ( ) 50/.
60. .
61. .
, .
62. (Amplifier) . 11.
11
63. Gain .
64. ,
65. .
66. Gain , .
67. , .
68.
69. .
: .
.
12
71. Timebase ( ) 2 /.
72. ,
5