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LMH0071 does not work properly in DVB-ASI continuous mode?

Ramin z.kak
Prodigy 30 points
Other Parts Discussed in Thread: LMH0071

Hi all,

I have a bad experience using LMH0071 chip in receiving DVB-ASI signal in continuous mode, I want you to tell me is there any thing wrong in my work or this is really the device's limitation which is not acceptable for me?!!


I have a problem using LMH0071 in receiving DVB-ASI signal

The lmh0071 in DVB-ASI mode does not receive ASI signal in continuous mode. The chip is functioning correctly when ASI input stream is in burst mode because burst mode meets the device's requirement of up to 110 consecutive k28.5 characters to 8b/10b decoder successfully lock (as described in datasheet) and in contiuous mode I observed that at the inoput rates above approx 15mbps the chip does not lock because in continuous mode between every 15 k28.5 characters there is  a valid data character.

first of all, I want to know is there any thing wrong in my observation?

and at the second stage if the device has this kind of limitation is there any replacement pin compatible with it to resolve my problem?


I have found that Ti has pin compatible serdesDS32ELX0124  which can be used but unfortuneatly serial input freqency range is from 1.25 to 3.215Gbps.

Every comment is apperciated,

Regards,

Ramin