TXC-02050 Transwitch, TXC-02050 Datasheet - Page 18

• Manufacturer Part Number: TXC-02050
• Description: Line Interface
• Manufacturer: Transwitch

Jitter Tolerance
CCITT Recommendation G.823 specifies that network equipment must be able to accommodate and tolerate
levels of jitter up to certain specified limits. The MRT accommodates and tolerates more input jitter than the
level of input jitter specified by the CCITT.
With input jitter applied to the MRT line side receive input DI1 (pin 29), the MRT properly recovers clock,
decodes the HDB3, and outputs error-free NRZ data over (and beyond) the CCITT specified jitter input and
frequency ranges. Performance characteristics are shown below in Figure 15 (34.368 Mbit/s operation) and
Figure 16 (8.448 Mbit/s operation).
LOG SCALE
LOG SCALE
10.0
10.0
1.0
0.1
1.0
0.1
10Hz
10Hz
Minimum Requirement
Figure 15. MRT Jitter Tolerance at34.368 Mbit/s
Figure 16. MRT Jitter Tolerance at 8.448 Mbit/s
Minimum Requirement
100Hz
100Hz
(V
(V
Measured
Measured
DD
DD
1kHz
1kHz
= 5V, T
= 5V, T
Frequency
Frequency
- 18 -
Acceptance
CCITT Rec. G.823 Limit
A
A
10kHz
Acceptance
Range
10kHz
kHz
= 25
= 25
10
Range
CCITT Rec. G.823 Limit
kHz
30
o
o
C)
C)
100kHz
100kHz
1MHz
1MHz
LOG SCALE
Ed. 3, April 1994
TXC-02050-MB
MRT