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LMH0356 and LMH0366 aboute

hisakichi kobayashi
Intellectual 950 points
Other Parts Discussed in Thread: LMH0366, LMH0356

Hi all,

The MADI characteristic of LMH0366 (one input)
1) eye-patterns monitor.
  Although I had capture of 3G-SDI photographed last time
  Can you capture in AES-10 (MADI) 125MBit/sec?

2) Gitta zone
  At LMH0356, it is SPI communication.
  Jitter Transfer with Different Charge Pump Current Settings was changed,
  and the zone of PLL was extended and employed.
  Does this function exist in LMH0366?
  Refer to LMH0356(With SMBus).pdf FIGURE 6.

3) Please indicate, if there is evaluation information on the MADI environment.
  Data of LMH0366
  The measuring instrument used

Regerds,
Hisa Kobayashi.

  • 0
    TI__Guru* 88905 points

    Kobayashi-San,

    1). Eye diagram is not operational when using MADI data rate. As you said MADI is 125Mbps and this is very low speed and customers normally use eye diagram for SD or higher data rates when the device is locked to the incoming data rate.

    2). Using LMH0366, you can change charge pump current to set different loop bandwidth. Below is the register settings to change to different charge pump current/loop bandwidth:

    Loop BW register has 32 different settings. Registers 0x13[3:2] MSB and 0x1C[7:5] LSB make up the 5 bits settings for the loop bandwidth.

    Below is the procedure to change the loop bandwidth to about 3.2MHz:

    1). Reg 0x0A[6] = 1b        ; Enable to change loop BW settings

    2). Reg 0x1C[7:5] = 011b   ; LSB  

    3). Reg 0x13[3:2] = 00b    ; MSB 

    3). MADI was evaluated using Agilent BERT running at 125Mbps and using PRBS10 data pattern.

    Regards,,nasser

  • 0 in reply to Nasser Mohammadi
    Intellectual 950 points

    Nasser-san

    Hellow Naserr.
    I ask to the User whether the answer is right.

    I am a benefit. Please tell a next opportunity.

    Regerds,
    Hisa Kobayashi.