Tally light polarity issue with Archer 2 monitor cable setup

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2012General Discussion forum

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

A custom cable connecting an Archer 2 sled to a Marshall monitor for tally and power can exhibit reversed polarity where the tally LED turns off when the sensor detects light instead of turning on.
Steadicam does not provide a factory tally light solution for the lower monitor area of an Archer 2 system equipped with certain Marshall monitor models.
Testing a problematic cable on a different Archer 2 sled can help isolate whether the issue originates from the cable assembly or the sled itself.
A cable that malfunctions in one location may perform differently when tested elsewhere, suggesting environmental or connection-dependent factors.

Issue specific to a particular Marshall 7 inch HD/SDI monitor model without integrated tally capability.
The problem involved a custom-made cable rather than factory equipment.
Resolution was not fully documented in the thread as work was ongoing.
The thread does not provide details about what the eventual solution was.