SNOSDC1A June 2024 – October 2024 LMH1229 , LMH1239
PRODUCTION DATA
In addition to SDI cable driver VOD control, the LMH12x9 can add pre-emphasis on the cable driver output to improve output signal integrity when the reclocker recovers a UHD (12G, 6G) or HD (3G, 1.5G) input data rate. By default, pre-emphasis is enabled for 12G and 6G data rates, and is disabled for all other data rates. When pre-emphasis is disabled, the effects of crosstalk on SDI_IN are minimized at SDI_OUT. When enabled, the amount of pre-emphasis applied to the cable driver output is determined by register control. If the reclocker is bypassed or if the user desires to disable automatic pre-emphasis, pre-emphasis can be enabled manually through register control. For more information, refer to the LMH12x9 Programming Guide.