Hi Team,
There are questions about input noise for LMH1981 as Genlock circuit. Could you help?
1. If there is noise at input, the lock will be released? Which level of noise will be cause of this? e.g. 50ns pulse
2. If 1. is correct and will be apply small noise less than that, Whether HSOUT and VSOUT will response the input or not?
3. Regarding Figure 12. on D/S, I can see two pulses of Vsnyc. In this case;
3-1. Should the system ignore these pulses?
3-2. This is NTSC case, Does other signal have same situation? (two VSnyc pulses)
3-3. Is that possible to apply Vsync after start-up time?
Regards,
Kotaro Yamashita
