CoachComm Tempest NG Sideline, User Manual

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Tempest NG User Manual v1.2013 27
Components
Auto-Null
- Nulling is required to electronically balance an audio device, in this case a BaseStation, with a 2-wire intercom
system. This procedure MUST NOT be performed while the system is in use in a game environment. All users will hear
nulling-tones during the adjustment and sounds from users can interfere with the process.
» Ensure all wired and wireless devices are connected before nulling.
» Ensure that ALL TALK buttons on the system are deactivated (off) before nulling.
» Null each BaseStation, one at a time, whenever there is excess echo audible to the wireless users.
» With dry pairs connected, and power provided to both the sideline and pressbox units perform the dry pair test from
page 12, to assure good connections.
» Use the menu to advance to Auto-Null and press ENTER. You should see the channel indicator LEDs automatically
advance from channel 1 through channel 8.
» Press MENU to go back one level and test for echo. Echo cancellation software is inactive while in the nulling screen,
and must be re-activated to test system operation. To test, use the BaseStation front panel headset and count to five on
all eight channels listening for your own echo. The first few words may have echo that will be eliminated by software
as you speak.
» In the event that some echo persists, advance to the Manual Null screen, use the “SEL” button to advance to the desired
channel, adjust the “IN” knob one null increment higher or lower and test again. Use this method to fine tune by trial
and error.
» Press MENU repeatedly to exit to the operational screen.