How to sync Zoom F8 to Tentacle or sync Tentacle to Zoom F8

Hi – please can you advise (A) how to sync the Zoom F8 to a TentacleSync Tentacle and (B) how to sync a TentacleSync Tentacle to the Zoom F8.  Tried every setting and failed.  For example, when starting Tentacle in Red-Mode and connecting it to the recorder’s Time Code Out BNC, the Tentacle’s light starts to flash red in a steady rhythm, but never changes to green to indicate that it has synced and switched to Green-Mode.  I have tried setting the F8 to Internal free run mode for that and have tried setting it to External mode in order to try to sync it to a Tentacle.  Luck with any of those attempts.

Please help.

Alex