Interference between Thompson HD wireless camera and Bartech wireless focus system on MK-V stabilized rig

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2008Cameras (Film/Video/HD) forum

18 years old. Gear and prices may have changed since.

DisputedParticipants disagreed and reached no conclusion. Read the findings as positions, not as an answer.

The Thompson HD wireless camera's RF signal caused interference with Bartech wireless focus receivers and in-ear monitoring systems when used on an MK-V rig.
The problem was traced to inadequate shielding in the MK-V V3 postcable carrying the HD-SDI signal, which acted as an antenna and amplified the RF interference to nearby wireless equipment.
Removing the postcable from the signal path and routing the HD-SDI directly to an external monitor eliminated the interference issue.
The MK-V sled's wiring used insufficient gauge (20-22 AWG) for HD camera power demands; upgrading to 16-18 AWG wire improved performance.
The V3 electronics use regular Lemo plugs rather than properly shielded connectors, compromising signal integrity.
Users reported difficulty obtaining support and replacement solutions from the manufacturer regarding these electronics issues.
An older Seitz wireless focus system operating at 89 MHz worked without interference on the same rig.
A Transvideo HD monitor functioned well when used with external cable routing rather than through the sled's internal post system.

These observations are specific to the MK-V stabilized rig platform.
The interference pattern may vary with different wireless frequencies and equipment combinations.
The wireless camera used was the Thompson HD model; results may differ with other HD wireless systems.
Solutions implemented involved custom rewiring and external cable routing, which adds complexity to the rig setup.
No definitive manufacturer fix was confirmed during the discussion period (2008-2009).