S3076DI データシートの表示（PDF） - Unspecified
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S3076DI Datasheet PDF : 18 Pages
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S3076
MULTI-RATE SONET/SDH CLOCK RECOVERY UNIT
SONET JITTER CHARACTERISTICS
Performance
The S3076 PLL complies with the jitter specifications
proposed for SONET/SDH equipment defined by the
Bellcore Specifications: GR-253-CORE, Issue 2, De-
cember 1995 and ITU-T Recommendations: G.958
document, when used as specified.
Input Jitter Tolerance
Input jitter tolerance is defined as the peak to
peak amplitude of sinusoidal jitter applied on the
input signal that causes an equivalent 1 dB opti-
cal/electrical power penalty. SONET input jitter
tolerance requirements are shown in Figure 3.
Jitter Transfer
The jitter transfer function is defined as the ratio of
jitter on the output OC-N/STS-N signal to the jitter
applied on the input OC-N/STS-N signal versus fre-
quency. Jitter transfer requirements are shown in Fig-
ure 4. The measurement condition is that input
sinusoidal jitter up to the mask level in Figure 4 be
applied.
Jitter Generation
The jitter of the serial clock and serial data outputs
shall not exceed the value specified in Table 7. when
a serial data input with no jitter is presented to the
serial data inputs. (See Table 7.)
Figure 3. Input Jitter Tolerance Specification
Sinusodal
Input Jitter 15
Amplitude
(UI p-p)
1.5
0.15
f0
f1
f2
f3
ft
Frequency
OC/STS f0
f1
f2
f3
ft
Level (Hz) (Hz) (Hz) (kHz) (kHz)
48
10 600 6000 100 1000
243
12
10 30 300 25 250
3
10 30 300 6.5 65
Figure 4. Jitter Transfer Specification
P
slope = -20 dB/decade
Jitter
Transfer
Acceptable
Range
OC/STS
Level1,2
48
243
12
3
fc
Frequency
fc
(kHz)
2000
500
130
P
(dB)
0.1
0.1
0.1
1. Bellcore Specifications: GR-253- CORE, Issue 2, December 1995.
2. ITU-T Recommendations: G.958.
3. Not specified in GR-253 or G.958.
4
October 23, 2000 / Revision A
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