Lmh1297Evm Eq Mode Default Setup For Smbus Operation With Sigcon Architect - Texas Instruments LMH1297 User Manual

Setup
= Shunt Jumper Connection
Video Pattern Generator over
75-Q ^]vPo -ended Coax Cable
OR
LMH1218 OUT0+ Output
Video Pattern Analyzer over 75-Q
Single-ended Coax Cable
PC can be used to communicate with LMH1297
via SMBus Mode.
USB-to-miniUSB Cable
Figure 5. LMH1297EVM EQ Mode Default Setup for SMBus Operation With SigCon Architect
10
LMH1297EVM Evaluation Board
GND
SDI_IO+
75-Q ^]vPo -ended
Coax Cable
SDI_OUT+
75-Q ^]vPo -ended
Coax Cable
Copyright © 2017–2019, Texas Instruments Incorporated
2.5-V Power
Supply
OUT0+
100-Q D š Z
Differential Coax Cables
OUT0-
IN0+
IN0-
Control Pin Configuration Notes:
J10 (EQ/CD_SEL) = Level L
x LMH1297 placed in EQ Mode. I/O configured as input.
x IN0 automatically powered down
J11 (OUT0_SEL) = Level L
x OUT0 powered up and enabled.
x In EQ Mode, OUT0 is always enabled.
J12 (HOST_EQ0) = Level F
x IN0 EQ settings ignored, since IN0 is powered down.
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 SDI_OUT+.
J15 (SDI_VOD) = Level F
x Output nominal VOD on 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.
SNAU205A – March 2017 – Revised August 2019
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DCAJ or Equivalent
Oscilloscope
(For Eye Monitor and
Jitter Decomposition)