zl50031 Zarlink Semiconductor, zl50031 Datasheet - Page 31

• Manufacturer Part Number: zl50031
• Description: Flexible 4 K X 2 K Channel Digital Switch With H.110 Interface And 2 K X 2 K Local Switch
• Manufacturer: Zarlink Semiconductor

All outputs are derived from the same signal, therefore these diagrams apply to all outputs. Since 1 U.I. at
1.544 MHz (648 ns
output frequencies must be calculated in common units (e.g., seconds) as shown in the following example:
What is the T1 and E1 output jitter when the T1 input jitter is 20 U.I. (T1 U.I. Units) and the T1 to T1 jitter attenuation
is 18 dB, for a given jittering frequency?
Using the method mentioned above, the jitter attenuation can be calculated for all combinations of inputs and
outputs.
Because intrinsic jitter is always present, the jitter attenuation will appear to be lower for small input jitter signals
than for large ones. Consequently, accurate jitter transfer function measurements are usually made with large input
jitter signals (e.g., 75% of the specified maximum jitter tolerance).
Figure 10 - DPLL Jitter Transfer Function Diagram - Wide Range of Frequencies
PP
) is not equal to 1 U.I. at 2.048 MHz (488 ns
OutputT1
OutputT1
OutputE1
OutputE1
=
=
=
=
Zarlink Semiconductor Inc.
InputT1
20
OutputT1
OutputT1
×10
ZL50031


–
-------- -
20
×10
18
31
×


×


(
--------------------- -
(
=
–
------ -
1UIT1
1UIE1
(
-------------------
(
20
644ns
488ns
A
2.5UI T1


)
)
)
)
PP
(
=
). a transfer value using different input and
3.3UI T1
)
(
)
Data Sheet