Clear-Com Tempest2400 - Manual (Page 68)

62 Tempest®24 00 2 -Channel Wireless Intercom System
Accu- Sync
Three BaseStati ons Accu-Synced
Accu-Sync provides a common ti ming signal between connected BaseStati ons. This signal ensures that transmission cycles
for all Accu-Synced BaseStati ons occur simultaneously. This synchronized transmission eliminates the negati ve RF eff ect
called desensing. See the following secti on, “Special RF Considerati ons for Multi ple BaseStati ons,” for more informati on
on connecti ng multi ple BaseStati ons.
When two or more Tempest BaseStati ons are to be operated in the same locati on, connecti ng the BaseStati ons via the
BaseSync connector on the back of the BaseStati on, minimizes potenti al RF interference between BaseStati ons. The more
BaseStati ons there are in close proximity to each other, the more important it is to use Accu-Sync.
One BaseStati on must always act as the sync source when using Accu-Sync. The sync source is any BaseStati on that does
not have a BaseSync cable plugged into the BaseSync IN connector. Always ensure that one, and only one BaseStati on has
an open (no connecti on) BaseSync IN connector.
When a BaseStati on does not have a BaseSync cable plugged into the BaseSync IN connector, that BaseStati on uses an
internally generated ti ming pulse to control its own transmission cycle.
When a BaseStati on has a BaseSync cable plugged into the BaseSync IN connector, that BaseStati on uses the external sync
signal (ti ming pulse) to control its transmission cycle.
The BaseSync cable is a DE-9F To DE-9M wired straight through on pins 1-5. The maximum distance a BaseSync cable can
be is 1,500 feet (457.2 m).
BASESYNC IN
Accu-Sync - DE-9 Connector
Never connect Accu-Sync cables between 2.4GHZ and 900MHz Tempest models.