???????
|
?????? ??????
|
????????? ??????
|
100
|
10
000
000
000
|
|
100
000
|
|
90
|
1
000
000
000
|
|
31
623
|
|
80
|
100
000
000
|
|
10
000
|
|
70
|
10
000
000
|
|
3
162
|
|
60
|
1
000
000
|
|
1
000
|
|
50
|
100
000
|
|
316
|
.2
|
40
|
10
000
|
|
100
|
|
30
|
1
000
|
|
31
|
.62
|
20
|
100
|
|
10
|
|
10
|
10
|
|
3
|
.162
|
6
|
3
|
.981 ? 4
|
1
|
.995 ? 2
|
3
|
1
|
.995 ? 2
|
1
|
.413 ?
√
?
|
1
|
1
|
.259
|
1
|
.122
|
0
|
1
|
|
1
|
|
?1
|
0
|
.794
|
0
|
.891
|
?3
|
0
|
.501 ?
?
⁄
?
|
0
|
.708 ?
√
'"`UNIQ--templatestyles-????????-QINU`"'
?
⁄
?
|
?6
|
0
|
.251 ?
?
⁄
?
|
0
|
.501 ?
?
⁄
?
|
?10
|
0
|
.1
|
0
|
.316
2
|
?20
|
0
|
.01
|
0
|
.1
|
?30
|
0
|
.001
|
0
|
.031
62
|
?40
|
0
|
.000
1
|
0
|
.01
|
?50
|
0
|
.000
01
|
0
|
.003
162
|
?60
|
0
|
.000
001
|
0
|
.001
|
?70
|
0
|
.000
000
1
|
0
|
.000
316
2
|
?80
|
0
|
.000
000
01
|
0
|
.000
1
|
?90
|
0
|
.000
000
001
|
0
|
.000
031
62
|
?100
|
0
|
.000
000
000
1
|
0
|
.000
01
|
An example scale showing power ratios
x
, amplitude ratios
√
x
, and dB equivalents 10 log
10
x
.
|
??????? ??? ???????? ???? ???? ?? ????? ?? ????? ?? ????? ??? ??? ?? ???????? ?????????? ?????? ????? ?? ??????? ????? ???????? ??? ???????? ??????? ????? ??????? ???? "?????????? ???"-?? ????????? ??? ??? ??????????? ?? ????????????? (????? ???? ?????????? ??????? ??? ?????, ?? ??? ?????? ???)? ????? ???????????? ??????? ???????? ??? ? ??????? ???, ????? ????? ???????????? ?????? ??
?/??
??? ?????????????? ?????? ??
?/??
[?]
[?]
????? ???????? ?????
??? ???
??????? ??????? ????? ??????? ???? ??????? ???????? ????? ??????? ????????? ????? ?????? ?????? ???? ????????? ????????? ??? ?????????? ???????? ??????? ???????? ???? ????? ??? ???? ??? ????????? ??? ?
?????
???? ????, ??? ??? ?????????? ?????? ??? V (???????????? - ?? dBV, ?? ??????? ?????)? ???? ??? ??????? ????????? ??? ? ????????? ???, ????? ?????????? ?????? ??? M (????????????-?? dBM, ?? ?????? ?????????)?
[?]
???????? ???????? ??? ??????? ??? ??????? ???? ?????? ???????? ???? ????? ???????? ??????? ??? ???? ??????? ?????? ???????? ????????, ????????? ?????? ?? ?? ??????? ????????? ?? ???? ??????????? ? ?????????????? ??? ??? ?????? ???? ??? ???????????? ???? ????? ??????? ??? ?? ?? ?????? (??, ???, ????) ???? ????? ????, ????? ????? ??????? ?????????? ???????? ????? ??? ?? ??????? ????? ????? ???????????? ??? ????, ???????????? ???? ????/????????? ??????? ??^? ?? ??? ????? ???????? ????? ???????? ????? ??? ?? ??????? ??? ????? ?????????, ????????? ??????? ??? ??? ??? ?????? ????, ????? ???????? ????????? ??? ?? ??????? ?????? ?????
??????? ??????????? ??????????? ??????? ??????? ????? ??????? ???? ???? ?????????????? ??? ???????? ?????????? ???? ???????? ???? ??????? ?????? ??????? ???? ???? ??????? ???????? ? ????????? ?????????
??????????? ??????? ?????
??????? ????? ?????? ???? ?? ?????? ??? ???? ???? ?? ????? ?? ????? ?? ??? ?? ???????- ???? ??? ?????? ???????? ??????? ??? ?? ????? ?????????? ?????? ????????? ???????, ??? ??? ????? ??????? ??? ????? ????
???????????
,
????????? ??????
?
?????????? ??????
?? ??????? ? ?????????? ??????? ???????? ??????? ????? ???? ??????? ????????? ????????????
????
, ???? ??????? ??????? ?????? ??????? ??????? ????? (Attenuation) ?
?????-?????? ??????
??????? ???? ?????? ??? ???? ?????
??????????? ???? ????????
??????? ?????? ????????, ??????? ???????? ???? ???, ?? ?????????? ????????????? ????? ?????????????? ???????? ??????? ??????? ??? ??? ??????????? ?? ????????????? ??????? ??????? ????
[?]
????????? ? ??????? ???????? ???????? ????? (Signal loss) ?????? ???? ????? ?????? ???????? ??????? ?????? ??????? ??????? ?????? "????? ?? ????????????? ????" (??????) ????? ???????? ???????? ????? ????? ??? ???? ? ???? ????????? ????? ??????? ???? ????? ???????? ???? ???????? ????? ????? ??? ??? ??? ??? ?? ??????? ???? ?????? ?????? ?? ?????? ?????? ????? ????? ?????? ???? ?????, ?? ?????? ?????? ?? ?????? ???????? ???? ????????? ????? ??????? ????? ?????? ???-"????? ???????? ?? ??? ???????? ?????? ??? ? ????? ????? ?.??? ????? (
????? ??????
?????????? ????????? ???? ?????-?????? ?? ???? ??? ???? ??? ??????) ?????????????? ????"
???? ???? ??? ???????? ????????????? ???????? ??????? ??? ???? ????????? ??????? ?? ?????? ??????? ??????????? ????? ?????? ???????????? ???? ?? ??????=?.??? ??????????? ?????? ???? ???? ??????????? ????? ???-?? ??????? ??? ?????? ???????????? ??? ????
[?]