- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367892 > PE-65966 (Exar Corporation) E3/DS3/STS-1 LINE INTERFACE UNIT PDF資料下載
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)： | 34/55頁 |
| 文件大?。?/td> | 608K |
| 代理商： | PE-65966 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁當前第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁
XRT7300
E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.1.1
á
30
3.5.3
Decoder
The HDB3/B3ZS Decoder of the XRT7300 can be
enabled or disabled by either of the following means:
If the XRT7300 is operating in the Hardware Mode:
Enable the HDB3/B3ZS Decoder by pulling the DE-
CODIS input pin (pin 22) to GND. To disable the
HDB3/B3ZS Decoder, pull the DECODIS input pin to
VDD.
If the XRT7300 is operating in the HOST Mode:
Enable the XRT7300 HDB3/B3ZS Decoder by writing
a “0” into the DECODIS bit-field in Command Regis-
ter CR2. To disable the HDB3/B3ZS Decoder, write a
“1” into the DECODIS bit-field.
Enabling/Disabling the HDB3/B3ZS
3.6
The XRT7300 contains circuitry that monitors the fol-
lowing two parameters associated with the incoming
line signals.
1.
The amplitude of the incoming line signal via the
RTIP and RRING inputs; and
LOS D
ECLARATION
/C
LEARANCE
2.
The number of pulses detected (in the incoming
line signal) within a certain amount of time.
If the XRT7300 determines that the incoming line sig-
nal is missing (either due to insufficient amplitude or a
lack of pulses in the incoming line signal), then it de-
clares a Loss of Signal (LOS) condition. The
XRT7300 declares the LOS condition by toggling the
RLOS output pin “High” and by setting the RLOS bit
field in Command Register 0 to “1”.
If the XRT7300 determines that the incoming line sig-
nal has been restored (e.g., there is sufficient ampli-
tude and pulses in the incoming line signal) then it
clears the LOS condition by toggling the RLOS output
pin “Low” and setting the RLOS bit-field to “0”.
The LOS Declaration/Clearance scheme that is em-
ployed in the XRT7300 is based upon ITU-T Recom-
mendation G.775 for both E3 and DS3 applications.
The LOS Declaration and Clearance criteria that the
XRT7300 uses for each of these modes (e.g., E3 and
DS3) are presented below.
3.6.1
The LOS Declaration/Clearance Criteria
for E3 Applications
When the XRT7300 is operating in the E3 Mode, it
declares an LOS Condition if the signal amplitude
drops to -35dB or below. Further, the XRT7300
clears the LOS Condition if the signal amplitude rises
back up to -15dB or above. Figure 21 illustrates the
signal levels at which the XRT7300 asserts and
clears LOS.
COMMAND REGISTER CR2 (ADDRESS = 0X02)
D4
D3
D2
D1
D0
DECODIS ENCODIS ALOSDIS DLOSDIS
REQDIS
0
X
X
X
X
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PE-65967 | E3/DS3/STS-1 LINE INTERFACE UNIT |
| PE-68629 | E3/DS3/STS-1 LINE INTERFACE UNIT |
| PE-68025 | SURFACE MOUNT 10BASE-T INTERFACE MODULES |
| PE-68026 | SURFACE MOUNT 10BASE-T INTERFACE MODULES |
| PE-68027 | SURFACE MOUNT 10BASE-T INTERFACE MODULES |
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: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。