Rev.7a (for units from ser.no. 51053/built 2010) 26.01.2010 This document substitutes previous versions page 19 of 34
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AIRCOM Manual
6.10.
Test Oscillator
▪
Configuration switch 4-12
▪
LED labelled TEST OSC flashes bright red, located at the „display for enhanced funtions“ area on the
front panel
The built-in test oscillator (approx. 1kHz, level +6dBu +/-1dB) serves for rough line checks or line
identification.
When switching the oscillator on, test signal is always present at sum output A+GUEST+B, on all other
outputs only in case they are on, i.e. ON AIR buttons active or TALK buttons depressed.
On AUX OUT A and AUX OUT B it normally follows the ON AIR button state, but in case AUX OUT PRE
(refer to 6.3) is selected, it will be always present on both outputs.
Test signal always substitutes commentator signals.
Note 1:
Test signal is directly fed into the output stages. It does not pass through any signal
procession. E.g. the summing output will always deliver the same level if A or B are ON AIR active or
not; there is no level change if LIMITER is on or off.
Note 2:
Test signal is not recorded by the level meter. The level meter will always display commentator
signals.
6.11.
Guest Lock
▪
Enabled by activation of GPI In „GUEST LOCK“, Pin 7 of REMOTE GPI/AUDIO Connector
GUEST LOCK forces the GUEST ON AIR button to the activated state. Any action at the GUEST ON AIR
button has no effect.
Nevertheless GUEST ON AIR can be deactivated by GPI IN “OFF AIR G”.
The illumination of the ON AIR button shows the actual state. Yellow=not active, Red=ON AIR.
Note 1:
A GUEST channel is often used for an ambience microphone or other signals which should be
permanently present at the output. GUEST LOCK forces the GUEST ON AIR button to ON. In case the
operator accidentally touches the button, it will have no effect.
Note 2:
Unlike all other GPI Inputs GUEST LOCK is independent from REMOTE LINK mode, please also
refer to Chapter 7.2
Compatibility note:
Pin 7 may only be connected to 0V at AIRCOM units built from 2010. On units
before this date, Pin 7 is connected to +5V internally!
