Datasheet

SD356EVK User Manual 10 of 11
Rev 1.0 © 2008, National Semiconductor Corp.
SD356EVK Board Settings
Essentially all of the settings of the SD356EVK are set to their nominal values to produce the typical eye
diagram shown in Figure 3.
Table 3. Control Settings and Indicator States to Produce Typical Eye Diagram
Function Switch Indicator Switch and
Indicator State
Comments
Input Select Sel0
Sel1
Sel0
Sel1
Both switches off
Both indicator
lights green
This is the setting for
selecting input SDI0.
Other selection settings
can be used with other
SDI inputs.
Rate Select Rate0
Rate1
Rate0
Rate1
Both switches off
Both indicator
lights green
This is the setting for
automatic rate detect.
The rate selection
switches can also be set
to match the data rate
input. For a 1.4835 Gb/s
signal as described here,
Rate0 can be off and
Rate 1 on.
Bypass/Autobypass Bypass/Aut
obypass
Bypass Switch off
Indicator light off
LMH0356 reclocker in
normal (autobypass)
mode.
Output Mute OP Mute None Switch off LMH0356 reclocker
output is active.
Serial Clock Output
Enable
SCO_EN SCO_EN Switch off
Indicator light off
This test will produce the
same results regardless
of the state of the
SCO_EN.
Chip Enable ENABLE ENABLE Switch of
Indicator light on
LMH0356 is powered up.
SD/HD Indication None SD_HD Indicator green,
indicating HD or
3 Gb/s signal or
no signal
detected
The indicator will be red if
a 270 Mb/s signal is
used.
Lock Detection None LOCK DET Indicator on
(green),
indicating that the
LMH0356
reclocker is
locked to the
incoming signal
The indicator will be off if
a non-supported data
rate is used.