SD346EVK National Semiconductor, SD346EVK Datasheet - Page 9

• Manufacturer Part Number: SD346EVK
• Description: BOARD EVAL LMH0346
• Manufacturer: National Semiconductor

Specifications of SD346EVK

• Main Purpose: Video, HD/SD SDI Reclocker
• Utilized Ic / Part: LMH0346
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

SD346EVK Board Settings
Essentially all of the settings of the SD346EVK are set to their nominal values to produce the
typical eye diagram shown in Figure 3.
Rate Select
Bypass/Autobypass
Output Mute
Serial Clock Output
Enable
SD/HD Indication
Lock Detection
SD346EVK User Manual
Rev 1.0
Table 3. Control Settings and Indicator States to Produce Typical Eye Diagram
Function
Rate0
Rate1
Bypass/Aut
obypass
OP Mute
SCO_EN
None
None
Switch
© 2008, National Semiconductor Corp.
Rate0
Rate1
Bypass
None
SCO_EN
SD_HD
LOCK DET
Indicator
9 of 10
Both switches off
Both indicator
lights green
Switch off
Indicator light off
Switch off
Switch off
Indicator light off
Indicator green,
indicating HD or
3 Gb/s signal or
no signal
detected
Indicator on
(green),
indicating that the
LMH0356
Reclocker is
locked to the
incoming signal
Indicator State
Switch and
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,
Rate 0 can be off and
Rate 1 on.
LMH0346SQ Reclocker
in normal (autobypass)
mode.
LMH0346SQ Reclocker
output is active.
This test will produce the
same results regardless
of the state of the
SCO_EN.
The indicator will be red if
a 270 Mb/s signal is
used.
The indicator will be off if
a non-supported data
rate is used.
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