參數(shù)資料
型號: XRT91L32IQ-F
廠商: EXAR CORP
元件分類: 數(shù)字傳輸電路
英文描述: STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
中文描述: TRANSCEIVER, PQFP100
封裝: 14 X 20 MM, 2.70 MM HEIGHT, PLASTIC, QFP-100
文件頁數(shù): 33/37頁
文件大?。?/td> 417K
代理商: XRT91L32IQ-F
xr
REV. 1.0.2
XRT91L32
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
31
4.6.2
Jitter generation is defined as the amount of jitter at the STS-N output in the absence of applied input jitter. 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.
Phase noise plot shows the power of the noise with respect to the carrier power. When this curve is integrated
in the frequency band of interest, the outcome is the noise power. Jitter generation in rms is then derived by
factoring with the appropriate period for the clock cycle.
Jitter Generation
F
IGURE
25. XRT91L32 M
EASURED
E
LECTRICAL
P
HASE
N
OISE
T
RANSMIT
J
ITTER
G
ENERATION
AT
622.08 M
BPS
STS-12/STM4
USING
’1010’
OUTPUT
PATTERN
Phase Noise Transmit Jitter Generation
(Wide Band) using HP8560E
-120
-115
-110
-105
-100
-95
-90
1
10
100
1000
10000
100000
Frequency (kHz)
d
C
/
REFCLK = 19.44 MHz
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