參數(shù)資料
型號: XRT91L30IQ
廠商: Exar Corporation
文件頁數(shù): 30/40頁
文件大小: 0K
描述: IC TXRX SONET/SDH 8BIT 64QFP
標(biāo)準(zhǔn)包裝: 160
類型: 收發(fā)器
規(guī)程: SONET/SDH
電源電壓: 3.3V
安裝類型: 表面貼裝
封裝/外殼: 64-FQFP
供應(yīng)商設(shè)備封裝: 64-PQFP(10x10)
包裝: 托盤
XRT91L30
32
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
REV. 1.0.2
4.6.2
Jitter Generation
Jitter generation is defined as the amount of jitter at the STS-N output in the absence of applied input jitter. The
bandwidth is set according to the data rate. The Bellcore and ITU requirement for this type jitter is 0.01UI rms
measured with a specific band-pass filter.
For more information on these specifications refer to Bellcore TR-NWT-000253 sections 5.6.2-5 and GR-253-
CORE section 5.6 and ITUT G.783 section 9.3.1.1. Table 18 below shows the jitter generation limits per
BellCore GR-253 and ITUT G.783 versus XRT91L30 typical jitter performance.
FIGURE 25. XRT91L30 MEASURED JITTER TOLERANCE WITH 19.44MHZ REFERENCE CLOCK
STS-3/STM-1
STS-12/STM-4
TABLE 18: XRT91L30 OPTICAL JITTER GENERATION USING 223-1 PRBS PATTERN
INTERFACE
MEASUREMENTBAND FILTER
-3dB FREQUENCIES
GR-253/
G.783
MAXIMUM
PERMISSIBLE
LIMIT
XRT91L30 INTRINSIC JITTER
(TRANSMIT PARALLEL CLOCK
INPUT DIRECTION)
XRT91L30 INTRINSIC JITTER
(TRANSMIT PARALLEL CLOCK
OUTPUT DIRECTION)
HIGH PASS
LOW PASS
19.44 MHZ
REF CLOCK
77.76 MHZ
REF CLOCK
19.44 MHZ
REF CLOCK
77.76 MHZ
REF CLOCK
OPTICAL
(KHZ)
(MHZ)
mUI rms
OC3/STM1
12
1.3
10
2
1
2
OC12/STM4
12
5
10
7
8
7
TABLE 19: XRT91L30 OPTICAL JITTER GENERATION USING 223-1 PRBS PATTERN USING ALTERNATE STANDARD
FILTERS
INTERFACE
MEASUREMENTBAND FILTER
-3dB FREQUENCIES
XRT91L30 INTRINSIC JITTER
(TRANSMIT PARALLEL CLOCK
INPUT DIRECTION)
XRT91L30 INTRINSIC JITTER
(TRANSMIT PARALLEL CLOCK
OUTPUT DIRECTION)
HIGH PASS
LOW PASS
19.44 MHZ
REF CLOCK
77.76 MHZ
REF CLOCK
19.44 MHZ
REF CLOCK
77.76 MHZ
REF CLOCK
OPTICAL
(KHZ)
(MHZ)
mUI rms
OC3/STM1
65
1.3
2
1
2
OC12/STM4
250a
a. According to ITU-T G.783
5
4
5
4
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