Blonder tongue AMM-806, Справочное руководство

Страница: 219 / 285

212
Pre-Amp Noise Figure vs.
Carrier To Noise (4 MHz BW)
Input
Signal Noise Figure (dB)
Level 2 3 4 5 6 7 8 9 10
-30 27 26 25 24 23 22 21 20 19
-29 28 27 26 25 24 23 22 21 20
-28 29 28 27 26 25 24 23 22 21
-27 30 29 28 27 26 25 24 23 22
-26 31 30 29 28 27 26 25 24 23
-25 32 31 30 29 28 27 26 25 24
-24 33 32 31 30 29 28 27 26 25
-23 34 33 32 31 30 29 28 27 26
-22 35 34 33 32 31 30 29 28 27
-21 36 35 34 33 32 31 30 29 28
-20 37 36 35 34 33 32 31 30 29
-19 38 37 36 35 34 33 32 31 30
-18 39 38 37 36 35 34 33 32 31
-17 40 39 38 37 36 35 34 33 32
-16 41 40 39 38 37 36 35 34 33
-15 42 41 40 39 38 37 36 35 34
-14 43 42 41 40 39 38 37 36 35
-13 4 43 42 41 40 39 38 37 36
-12 45 44 43 42 41 40 39 38 37
-11 46 45 44 43 42 41 40 39 38
-10 47 46 45 44 43 42 41 40 39
-9 48 47 46 45 44 43 42 41 40
-8 49 48 47 46 45 44 43 42 41
-7 50 49 48 47 46 45 44 43 42
-6 51 50 49 48 47 46 45 44 43
-5 52 51 50 49 48 47 46 45 44
-4 53 52 51 50 49 48 47 46 45
-3 54 53 52 51 50 49 48 47 46
-2 55 54 53 52 51 50 49 48 47
-1 56 55 54 53 52 51 50 49 48
0 57 56 55 54 53 52 51 50 49
1 58 57 56 55 54 53 52 51 50
2 59 58 57 56 55 54 53 52 51
3 60 59 58 57 56 55 54 53 52
4 61 60 59 58 57 56 55 54 53
5 62 61 60 59 58 57 56 55 54
6 63 62 61 60 59 58 57 56 55
7 64 63 62 61 60 59 58 57 56
8 65 64 63 62 61 60 59 58 57
9 66 65 64 63 62 61 60 59 58
10 67 66 65 64 63 62 61 60 59
TASO
(TELEVISION
ALLOCATION STUDY
ORGANIZATION)
GRADES
EXCELLENT 46 dB
FINE 36 dB
PASSABLE 30 dB
MARGINAL 25 dB
INFERIOR 19 dB
A SNR OF 36 dB
MEANS A FINE
PICTURE TO AN
AVERAGE VIEWER,
A 30 dB RATIO
MEANS A PASSABLE
PICTURE AND SO ON.