VSC7125 Datasheet, PDF (9/16 Pages) Vitesse Semiconductor Corporation – 1.0625 Gbits/sec Fibre Channel Transceiver

Data Sheet
VSC7125
VITESSE
SEMICONDUCTOR CORPORATION
1.0625 Gbits/sec Fibre
Channel Transceiver
Figure 8: Transmitter Jitter Measurement Method
BERT
Pattern
DATA
Generator ^DATA
1.0625 GHz Clock
106.25MHz
Trigger
Digitizing
Scope
RJ
-K28.7 -K28.7
0011111000 0011111000
-K28.5 +K28.5
DJ ^{0011111010 1100000101}
VSC7125
TX
REFCLK ^TX+
TX-
T0:9
1.0625 Gb/s
Single-Ended 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 (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 variations.
V_DD +3.3 V
Figure 9: Input Structures
V_{DD +3.3 V}
INPUT
Current
Limit
R
R
GND
REFCLK and TTL Inputs
A
INPUT
INPUT
All Resistors
3.3K
GND
High Speed Differential Input
(RX+/RX-)
B
G52121-0, Rev. 4.1
4/23/98
© VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: [phone]
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