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參數(shù)資料
| 型號： | PE-65966 |
| 廠商： | Exar Corporation |
| 英文描述： | E3/DS3/STS-1 LINE INTERFACE UNIT |
| 中文描述： | E3/DS3/STS-1線路接口單元 |
| 文件頁數(shù)： | 30/55頁 |
| 文件大?。?/td> | 608K |
| 代理商： | PE-65966 |
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XRT7300
E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.1.1
á
26
interface the Receive Section of the XRT7300 to the
line as shown in Figure 16 or Figure 17.
3.2
After the XRT7300 has received the incoming line
signal via the RTIP and RRING input pins, the first
block that this signal passes through is the AGC cir-
cuit followed by the Receive Equalizer.
As the line signal is transmitted from a given transmit-
ting terminal, the pulse shapes at that location are ba-
sically square. Hence, these pulses consist of a com-
bination of “Low” and “High” frequency Fourier com-
ponents. As this line signal travels from the transmit-
ting terminal via the coaxial cable to the receiving
terminal, it is subjected to frequency-dependent loss.
In other words, the higher-frequency components of
T
HE
R
ECEIVE
E
QUALIZER
B
LOCK
the signal is subjected to a greater amount of attenu-
ation than the lower-frequency components. If this
line signal travels over reasonably long cable lengths
(e.g., greater than 450 feet), then the shape of the
pulses (which were originally square) is distorted and
inter-symbol interference increases.
The purpose of the Receive Equalizer is to equalize
the distortion of the incoming signal due to cable loss.
The Receive Equalizer accomplishes this by subject-
ing the received line signal to frequency-dependent
amplification (which attempts to counter the frequen-
cy dependent loss that the line signal has experi-
enced) and to restore the shape of the line signal so
F
IGURE
16. R
ECOMMENDED
S
CHEMATIC
FOR
I
NTERFACING
THE
R
ECEIVE
S
ECTION
OF
THE
XRT7300
TO
THE
L
INE
(T
RANSFORMER
-C
OUPLING
)
BNC
1:1
R1
37.5
R2
37.5
RTIP
RRING
C1
0.01uF
RPOS
RNEG
RCLK1
RLOS
RLOL
RxLOS
RxLOL
RxPOS
RxNEG
RxLineClk
T2
F
IGURE
17. R
ECOMMENDED
S
CHEMATIC
FOR
I
NTERFACING
THE
R
ECEIVE
S
ECTION
OF
THE
XRT7300
TO
THE
L
INE
(C
APACITIVE
-C
OUPLING
)
R1
75
RTIP
RRING
C1
0.01uF
C2
0.01uF
Receive Line Signal
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PE-65966NL | 功能描述:變壓器音頻和信號 TRANSFORMER DUAL RoHS:否 制造商:Skyworks Solutions, Inc. 頻率范圍:810 MHz to 960 MHz 初級線圈阻抗: 次級線圈阻抗: 絕緣電壓:23 dB 工作溫度范圍:- 40 C to + 85 C 端接類型:SMD/SMT 尺寸:6 mm L x 4.9 mm W x 1.6 mm H 產(chǎn)品:Splitters and Combiners |
| PE65967 | 制造商:Pulse Electronics Corporation 功能描述: |
| PE-65967 | 功能描述:變壓器音頻和信號 40uH 1:1 SMD RoHS:否 制造商:Skyworks Solutions, Inc. 頻率范圍:810 MHz to 960 MHz 初級線圈阻抗: 次級線圈阻抗: 絕緣電壓:23 dB 工作溫度范圍:- 40 C to + 85 C 端接類型:SMD/SMT 尺寸:6 mm L x 4.9 mm W x 1.6 mm H 產(chǎn)品:Splitters and Combiners |
| PE-65967NL | 功能描述:變壓器音頻和信號 TRANSFORMER DUAL RoHS:否 制造商:Skyworks Solutions, Inc. 頻率范圍:810 MHz to 960 MHz 初級線圈阻抗: 次級線圈阻抗: 絕緣電壓:23 dB 工作溫度范圍:- 40 C to + 85 C 端接類型:SMD/SMT 尺寸:6 mm L x 4.9 mm W x 1.6 mm H 產(chǎn)品:Splitters and Combiners |
| PE65967NLT | 制造商:Pulse Electronics Corporation 功能描述: |
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