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Zephyr HD sled wiring


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#1 Mark Schlicher

Mark Schlicher

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Posted 25 March 2012 - 03:33 PM

This was bantered about a bit earlier but it must be buried in a thread, and the search function won't unearth it for me. The question revolved around using the SD video line as a second HD-SDI line. Does it work, how marginal is it, etc.?

I had a little time to test with my Marshall monitor, which has an SDI "signal strength" indicator.

Pumping HD-SDI video down the HD-SDI line, jumpered from the sled to monitor with SDI-rated RG-179, the meter registered 90%.

Sending HD-SDI video down the SD line, through the Hirose power/video connector supplied by Tiffen to the monitor, the meter registered 80%.

Being curious, I partially disassebled the topstage and looked at the cables in the loom. Both connectors were wired with what appear to be the same type of RG-179 coax.

So, a good robust HD-SDI signal from both connections.
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#2 Alan Rencher

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Posted 25 March 2012 - 05:40 PM

This was bantered about a bit earlier but it must be buried in a thread, and the search function won't unearth it for me. The question revolved around using the SD video line as a second HD-SDI line. Does it work, how marginal is it, etc.?

I had a little time to test with my Marshall monitor, which has an SDI "signal strength" indicator.

Pumping HD-SDI video down the HD-SDI line, jumpered from the sled to monitor with SDI-rated RG-179, the meter registered 90%.

Sending HD-SDI video down the SD line, through the Hirose power/video connector supplied by Tiffen to the monitor, the meter registered 80%.

Being curious, I partially disassebled the topstage and looked at the cables in the loom. Both connectors were wired with what appear to be the same type of RG-179 coax.

So, a good robust HD-SDI signal from both connections.


Hey Mark,

I'm not speaking from any technical standpoint, but a purely empirical one. I use the "SD" port exclusively on my rig as it cuts down on clutter. I even loop it through my monitor and out to a wireless transmitter sometimes. I haven't had any issues yet.
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