OUT0+
OUT0-
IN0+
IN0-
GND
2.5-V Power
Supply
DCAJ or Equivalent
Oscilloscope
(For Eye Monitor and
Jitter Decomposition)
100-
Q
D
š Z
Differential Coax Cables
= Shunt Jumper Connection
Primary Output to Video Pattern
Analyzer over 75-
Q
^
]vPo
-ended
Coax Cable
75-
Q
^
]vPo
-ended
Coax Cable
USB-to-miniUSB Cable
Secondary Output to Video
Pattern Analyzer over 75-
Q
Single-ended Coax Cable
75-
Q
^
]vPo
-ended
Coax Cable
Video Pattern
Generator Output
OR
LMH1219 OUT0±
100-
Q
D
š Z
Differential Coax Cables
PC can be used to communicate with LMH1297
via SMBus Mode.
Control Pin Configuration Notes:
J10 (EQ/CD_SEL) = Level H
x
LMH1297 placed in CD Mode. I/O configured as output.
x
SDI_IO EQ automatically powered down
J11 (OUT0_SEL) = Level L
x
OUT0 powered up and enabled.
J12 (HOST_EQ0) = Level F
x
IN0 EQ set to normal adaptive operation
x
Set OUT0 VOD = 570 mVpp, DE = -0.4 dB.
J13 (MODE_SEL) = Level L
x
Operate in SMBus Mode
J14 (OUT_CTRL) = Level F
x
Reclocked data path (EQ and Reclocker Enabled) on
both OUT0± and .
J15 (SDI_VOD) = Level F
x
Output nominal VOD on SDI_IO and SDI_OUT (800
mVpp)
J16, J17 (ADDR0, ADDR1) = Level L
x
ADDR[1:0] = 00'b, meaning 7-bit slave address 0x2D, or
8-bit address (with Write Command) 0x5A.
J18 (SDI_OUT_SEL) = Level L
x
SDI_OUT powered up and enabled.
Setup
9
SNAU205A – March 2017 – Revised August 2019
Copyright © 2017–2019, Texas Instruments Incorporated
LMH1297EVM Evaluation Board
Figure 4. LMH1297EVM CD Mode Default Setup for SMBus Operation With SigCon Architect
