参数资料
型号: DS2174QN+T&R
厂商: Maxim Integrated Products
文件页数: 5/24页
文件大小: 0K
描述: IC BERT ENHANCED 44-PLCC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 500
功能: 增强型位误码率测试器(EBERT)
接口: E1,J1,T1
电路数: 1
电源电压: 3 V ~ 3.6 V
电流 - 电源: 50mA
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 44-LCC(J 形引线)
供应商设备封装: 44-PLCC(16.59x16.59)
包装: 带卷 (TR)
包括: 错误计数器,样式发生器和检测器
DS2174
13 of 24
3.1 Mode Select
The DS2174 is configured to operate in bit, nibble, or byte mode by using the MODE1/MODE0 bits in
Control Register 2.
Table 3-A. Mode Select
MODE1
MODE0
OPERATION MODE
00
Bit
0
1
Nibble
10
Byte
1
Invalid
3.1.1 Error Insertion
The DS2174 inserts bit errors at a particular rate by setting the error insertion bits in Control Register 2
(Table 3-B). In addition, the device inserts errors on command by setting the SBE bit in Control Register
2. The bit that occurs after the rising edge of the SBE insert bit is inverted. In the case of the QRSS
pattern, this could result in a string of 0’s longer than 14 bits; the DS2174 delays the erred bit by 1 clock
cycle.
Data in the nibble and byte modes is presented 4 or 8 bits at a time. When in nibble or byte mode and
selecting 10-1 error rate, the device actually produces an error rate of 8-1. When in byte mode and
selecting an error rate of 10-2, the device produces an error rate of 8-2.
Table 3-B. Error Bit Insertion
EIR2
EIR1
EIR0
ERROR RATE
SERIAL
NIBBLE
BYTE
000
None
444
001
10-1
4
8-1
010
10-2
44
8-2
011
10-3
444
100
10-4
444
101
10-5
444
110
10-6
444
111
10-7
444
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