> one video signal.  Somewhere inside it has two separate monitors, though.

yes.

> Sounds like this is the wrong HMD for the available signal.  Why not get the
> right one or perform a little surgury to remove the internal splitter?

The HMD is used for other things, and cannot be modified.  As far as
"getting the right one", keep in mind this is just a little side project,
and there isn't funding for "getting the right one".

> The composite approach is reasonable for the single monitor case with
> separate shutters for each eye.  In that case, though, the frame rate is
> usually much higher than NTSC video, so you've got more room to play with.
> Doing this with an HMD sounds like you are creating a headache generator.

The displays are LCD-type, and I believe they hold the signal for two
frames (ie you don't get terrible flicker).

So, for a minute lets assume that I have sound reasons for choosing my HMD
and my dual camera circuit.

My questions are:

1.  I was having trouble getting the LM1881 to give a consistent sync
signal when configured as per national semiconductors datasheet.  Any
thoughts on this?

2.  When the signal is fed in to the 1881, the properties seem to change
quite a bit.  Since I was planning on using this signal as an output (ie
before it hits the resistor/capacitor filter stuff), I am wondering if I
need to do something different.  (ie run it through an amplifier /
something first, and get two signals, one to drive the 1881, and one to
use as my output)

Any thoughts on this?

-Steve

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