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參數(shù)資料
| 型號： | AM79761 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | Physical Layer 10-Bit Transceiver for Gigabit Ethernet (GigaPHY⑩-SD) |
| 中文描述： | 物理層10位千兆以太網(wǎng)收發(fā)器（GigaPHY⑩，標(biāo)清） |
| 文件頁數(shù)： | 18/20頁 |
| 文件大小： | 132K |
| 代理商： | AM79761 |
18
Am79761
P R E L I M I N A R Y
MEASUREMENTS (Continued)
Figure 25.
Transmitter Jitter Measurement Method
BERT
Pattern
Generator
CLK = 1.25 GHz
DATA = 00000 0000011111 11111
DATA
PAT SYNC
Am79761
TXD[0:9]
REFCLK
TX+
TX-
Digitizing
Scope
Trigger
1.25 Gbps
Single-Ended Measurement
125 MHz
125 MHz
TRIGGER
DATA
2 bit time
7 bit time
8 bit time
9 bit time
12 bit time
10 bit time
17 bit time
19 bit time
18 bit time
20 bit time
BERT
Pattern
Generator
CLK = 1.25 GHz
DATA = 00000 0000011111 11111
DATA
DATA
Am79761
TXD[0:9]
REFCLK
TX+
TX-
Digitizing
Scope
Trigger
1.25 Gbps
Single-Ended Measurement
125 MHz
125 MHz
RJ
-K28.7
0011111000
Random Jitter Measurement
Random jitter (RJ) measurements performed according to Fibre Channel 4.3 Annex A, Test Methods, Section
A.4.4. Measure standard deviation of all 50% crossing points. Peak to peak RJ is
±
7 sigma of distribution.
Deterministic Jitter Measurement
Deterministic jitter (DJ) measurements
performed according to Fibre Channel
4.3 Annex A, Test Methods, Section A.4.3.
Measure time of all the 50% points of
all ten transitions. DJ is the range of
the timing variation from expected.
-K28.7
0011111000
DJ
-K28.5
0011111010
K28.5
1100000101
21560A-11
Transmitter Output Jitter Allocation
T
rj
Serial data output random jitter
(RMS)
RMS, tested on a sample basis
(refer to Figure 8)
—
20
ps
T
DJ
Serial data output deterministic
jitter (p-p)
Peak to peak, tested on a sample
basis (refer to Figure 8)
—
100
ps
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