I have a camera head containing 3 separate cameras. So there are 3 video streams that go through and analog mux in the camera head and go back to the TV5150AM1 over a single input. I am not , muxing between the two inputs of the 5150. The 3 video streams are all gen locked together from a common clock source. But there is as much as 5mS difference between the gen lock signals.
Under the current scheme, the analog mux can switch between video signals ANYWHERE within the frame. I am finding is that the 5150 can take as long as 200mS to lock on which is causing some problems. I would like to get this under 100mS. Can the group shed some light on what I MAY be able to do to lower the lock time.
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In particular, we need some help with the TV5150AM1 which we are using in our new design. In that camera head, up to three PAL video signals are multiplexed onto a single video cable which is connected to channel 1 of the TV5150AM1 video decoder. All three video signals are genlocked together. What we found is when we switch between video signals inside our camera head, the TV5150AM1 can take as long a 200msecs to lock before we can grab the digitized frame. This is too long for our application. In our previous generation product, we had used an video decoder which allowed us to do this. Unfortunately, the new TV5150AM1 doesn't seem to allow this fast locking.
Our firmware developer has already searched newsgroups and found some kind of register setting "patches" to be applied to supposedly speed up the horizontal lock time, but that didn't help. We need some assistance from TI to reduce this lock time. The three signals have the same offset, overall amplitude and are clock from the same source and phase locked. The only difference would be the image itself which is different for each camera.
Any help would be appreciated.
