XRT73L06 Datasheet, PDF (39/63 Pages) Exar Corporation – SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73L06
REV. 1.0.2
TABLE 8: JITTER AMPLITUDE VERSUS MODULATION FREQUENCY (JITTER TOLERANCE)
BIT RATE
(KB/S)
34368
44736
44736
51840
STANDARD
INPUT JITTER AMPLITUDE (UI _P-P)
A1
A2
A3
ITU-T G.823 1.5
0.15
-
GR-499
5
0.1
-
CORE Cat I
GR-499
10
0.3
-
CORE Cat II
GR-253
15
CORE Cat II
1.5
0.15
F1(HZ)
100
10
10
10
MODULATION FREQUENCY
F2(HZ) F3(KHZ) F4(KHZ) F5(KHZ)
1000
10
800
-
2.3k
60
300
-
669
22.3
300
-
30
300
2
20
4.2 JITTER TRANSFER
Jitter Transfer function is defined as the ratio of jitter on the output relative to the jitter applied on the input
versus frequency. There are two distinct characteristics in jitter transfer, jitter gain (jitter peaking) defined as
the highest ratio above 0dB and jitter transfer bandwidth. The overall jitter transfer bandwidth is controlled by a
low bandwidth loop, typically using a voltage-controlled crystal oscillator (VCXO).
The jitter transfer function is a ratio between the jitter output and jitter input for a component, or system often
expressed in dB. A negative dB jitter transfer indicates the element removed jitter. A positive dB jitter transfer
indicates the element added jitter. A zero dB jitter transfer indicates the element had no effect on jitter. Table 9
shows the jitter transfer characteristics and/or jitter attenuation specifications for various data rates:
TABLE 9: JITTER TRANSFER SPECIFICATION/REFERENCES
E3
ETSI TBR-24
DS3
GR-499 CORE section 7.3.2
Category I and Category II
STS-1
GR-253 CORE section 5.6.2.1
NOTE: The above specifications can be met only with a jitter attenuator that supports E3/DS3/STS-1 rates.
RATE
(KBITS)
34368
44736
51840
MASK
G.823
ETSI-TBR-24
GR-499, Cat I
GR-499, Cat II
GR-253 CORE
GR-253 CORE
TABLE 10: JITTER TRANSFER PASS MASKS
F1
F2
F3
F4
(HZ)
(HZ)
(HZ)
(KHZ)
100
300
3K
800K
10
10k
-
15k
10
56.6k
-
300k
10
40
-
15k
10
40k
-
400k
A1(dB)
0.5
0.1
0.1
0.1
0.1
A2(dB)
-19.5
-
-
-
-
36