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  • LMH1981: NTSC(BB)tdHSOUT min-max

    Part Number: LMH1981 I have a question about LMH1981. The datasheet only shows the typical value for the HSOUT swing (tdHSOUT) at NTSC (BB) input. Please let me know the maximum and minimum values. The output is connected to the FPGA, and I observed that…

  • LMH1981: Don't get any signal on VSOUT when Tri-Level Sync generator is applied on input in 1080p or 720p

    Part Number: LMH1981 Hello, I'm experimenting a bit this IC, but when I'm applying a Ref Genlock source on input which generate a 1080p25 broadcast Tri-Level Sync (AJA Gen 10) on input, I only get frame line pulse on HSOUT, but nothing on VSOUT…

  • LMH1981: Circuit design verification

    TI Thinks Resolved
    Part Number: LMH1981 Dear team I am using LMH1981 IC in my application of sync separator design. Here I am taking HSOUT and VSOUT fed to the FPGA. But in page 18 of datasheet it says that "All output signals should have a resistive load of about 10 kΩ…
    • Answered

  • RE: LMH1981: Recommended buffer between Sync Separator and Video Clock Generator

    Resolved
    Hello Aaron, Thank you for the answer. The customer is satisfied with the feedback and this case is now closed. Thank you for your support. Best Regards, Ryotaro Fukui

  • LMH1981: Glitches and missing HSYNCS

    Part Number: LMH1981 Other Parts Discussed in Thread: LMH1982 , I use the LMH1981 sync separator to pass HSOUT, VSOUT and FOUT to my FPGA. These signals are then fed through to the LMH1982. From time to time the LMH1982 loses reference, because there are…

  • RE: LMH1983: 1983 Unlock causes the encoded picture to be split up and down and an exception occurs.

    Hi Delun, Did you use LMH1981? Do you have a valid video signal to LMH1981?
    • Answered

  • LMK05028: TICS Pro register setting in case of LMH1981 and LMK05028

    Resolved
    Part Number: LMK05028 Other Parts Discussed in Thread: LMH1981 , LMH1983 Hi all Would you mind if we ask LMK05028? Our customer considers using LMH1981 and LMK05028 for 12GSDI like as following URL; https://www.ti.com/lit/an/snaa314/snaa314.pdf For video…
    • Resolved
    • Answered

  • LMH1981: Hsync Output Pulse Width of LMH1981

    Resolved
    Part Number: LMH1981 Other Parts Discussed in Thread: LMH1983 Hello, I have a question about LMH1981. [Q] My customer has a two boards equipped with LMH1981 and LMH1983. They use analog video input: NTSC. Board A: Hsync Output Pulse width=2.41usec. …
    • Resolved

  • OPA3832: Genlock

    TI Thinks Resolved
    Part Number: OPA3832 Other Parts Discussed in Thread: LMH1981 , OPA692 , OPA693 Tool/software: As shown in the figure, please recommend amplifier chip to realize the function of genlock, one in and two out

  • LMH1981: Input Specifications.

    TI Thinks Resolved
    Part Number: LMH1981 Hi Team: You have to pardon my ignorance. The Vcc on my LMH1981 is 3.3 volts. I am feeding the input (measured at pin 4) a 1 volt pk-pk NTSC color bars signal. The back porch of the NTSC signal is at 1 volt. Is this within the specifications…

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