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参数资料
| 型号： | DS26334GN |
| 英文描述： | 3.3V, 16-Channel, E1/T1/J1 Short and Long-Haul Line Interface Unit |
| 中文描述： | 3.3伏，16路，E1/T1/J1短，长途线路接口单元 |
| 文件页数： | 34/115页 |
| 文件大小： | 756K |
| 代理商： | DS26334GN |
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DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
34 of 115
5.8.3 Remote Loopback
The inputs at RTIP and RRING are looped back to TTIP and TRING. The inputs at TCLK, TPOS and TNEG are
ignored during a remote loopback. This loopback is conceptually shown in
Figure 5-12
.
Note:
Remote loopback does not take precedence over transmit power-down and requires TCLK to operate. The
transmitters will use the recovered RCLK in remote loopback. TCLK is still required because if it is removed the
transmitters will power-down (TCLK held low) or transmit all ones (TCLK held high).
Figure 5-12. Remote Loopback
Line
Driver
H D B 3 /
B 8 Z S
E n c o d e r
O p t i o n a l
J i t t e r
A t t e n u a t o r
T r a n s m it
D ig it a l
T r a n s m it
A n a lo g
TCLK
TPOS
TNEG
H D B 3 /
B 8 Z S
D e c o d e r
O p t i o n a l
J i t t e r
A t t e n u a t o r
R e c e iv e
D ig ita l
R e c e iv e
A n a lo g
RCLK
RPOS
RNEG
RTIP
RRING
TNEG
5.9 BERT
There are two bit error rate testers available on the DS26334. One BERT can be mapped into LIUs 1–8 and the
other into LIUs 9-16 via the
BTCR
registers. The two BERTs operate independently of each other.
5.9.1 General Description
The BERT is a software programmable test pattern generator and monitor capable of meeting most error
performance requirements for digital transmission equipment. It will generate and synchronize to pseudo-random
patterns with a generation polynomial of the form x
+ x
+ 1, where n and y can take on values from 1 to 32 and to
repetitive patterns of any length up to 32 bits.
The transmit direction generates the programmable test pattern, and inserts the test pattern payload into the data
stream.
The receive direction extracts the test pattern payload from the receive data stream, and monitors the test pattern
payload for the programmable test pattern.
Features
Programmable PRBS pattern
– The Pseudo Random Bit Sequence (PRBS) polynomial (x
n
+ x
y
+ 1) and seed
are programmable (length n = 1 to 32, tap y = 1 to n – 1, and seed = 0 to 2
n
– 1).
Programmable repetitive pattern
– The repetitive pattern length and pattern are programmable (the length n
= 1 to 32 and pattern = 0 to 2
– 1).
24-bit error count and 32-bit bit count registers
Programmable bit error insertion
– Errors can be inserted individually, on a pin transition, or at a specific
rate. The rate 1/10
is programmable (n = 1 to 7).
Pattern synchronization at a 10
-3
BER
– Pattern synchronization will be achieved even in the presence of a
random Bit Error Rate (BER) of 10
-3
.
TTIP
TRING
相关PDF资料 |
PDF描述 |
|---|---|
| DS26503 | T1/E1/J1 BITS Element |
| DS26503L | T1/E1/J1 BITS Element |
| DS26503LN | T1/E1/J1 BITS Element |
| DS26503 | T1/E1/J1/64KCC BITS Element |
| DS26LV3 | 16 AMP LOW PROFILE POWER RELAY |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS26334GN+ | 功能描述:电信集成电路 3.3V E1/T1/J1 16Ch Short/Long Haul LIU RoHS:否 制造商:STMicroelectronics 类型:Telecom IC - Various 工作电源电压:4.75 V to 5.25 V 电源电流: 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-100 封装:Tray |
| DS26334GNA2 | 功能描述:电信集成电路 RoHS:否 制造商:STMicroelectronics 类型:Telecom IC - Various 工作电源电压:4.75 V to 5.25 V 电源电流: 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-100 封装:Tray |
| DS26334GNA2+ | 功能描述:电信集成电路 RoHS:否 制造商:STMicroelectronics 类型:Telecom IC - Various 工作电源电压:4.75 V to 5.25 V 电源电流: 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-100 封装:Tray |
| DS26334GNA3 | 功能描述:电信集成电路 3.3V E1/T1/J1 16Ch Short/Long Haul LIU RoHS:否 制造商:STMicroelectronics 类型:Telecom IC - Various 工作电源电压:4.75 V to 5.25 V 电源电流: 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-100 封装:Tray |
| DS26334GNA3+ | 功能描述:电信集成电路 3.3V E1/T1/J1 16Ch Short/Long Haul LIU RoHS:否 制造商:STMicroelectronics 类型:Telecom IC - Various 工作电源电压:4.75 V to 5.25 V 电源电流: 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:PQFP-100 封装:Tray |
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