Tek YT1 opt 4 recorder for 1502 / 1503 tdr's

What is for sale: Tek YT1 opt 4 recorder for 1502 / 1503 tdr's

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Tek OPT 4 Recorder PN 006-3618-00 for 1502 / 1503 TDR's
Even though I am familiar with most of the equipment I am not a technician and can not check this item out beyond a basic power up and/or self test if that function is available. I try to describe as accurately as possible and list as much as I know about the item. I also pop the covers when able and inspect for missing or burned components, water damage, obvious signs of attempt at repair, and anything else that is obvious to someone with a limited technical background