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4.6 B400 Functional Description
SStteerreeoo IInnppuutt//TTeellccoo MMoodduullee
TTOONNEE
The TONE switch applies a -60dBu signal to the modules pre-amplifier circuit.
This allows you to check the operation of the module. The switch illuminates to
indicate that TONE is active. Note that if the module is switched to TONE the
monitor mutes and remotes (start/stop) are disabled.
MMOONNOO SSOOUURRCCEE
When the L and the R switches are both released the stereo pairs of the sources
are routed normally in stereo. However if the L switch is depressed then the left
signal is fed in mono to both sides of the channel. Similarly the right signal is routed
to both sides if the R switch is pressed. If both switches are depressed then a
mono mix of left and right is fed to both sides of the channel.
RRHHSS ((ØØ))
The PHASE of the right-hand input signal may be inverted by use of the RHS ( Ø)
switch. The switch illuminates to indicate that it is switched on.
II//PP ((BB))
The module accepts two stereo sources via separate pairs of XLR-type connec-
tors. Pressing B (TLCO on the Telco module) selects the alternative input. On
the Telco module this would be suitable for a telephone input from an external
hybrid.
TTRRIIMM
TRIM provides -12dB to +12dB continuous control of whichever input is selected.
DDIIRREECCTT OOUUTTPPUUTT
The Telco module has a separate level control for the Direct Output.
With TELCO selected, and the channel routed to the stereo master, the Direct
Output sends a stereo clean feed signal consisting of the stereo mix, minus the
channels input signal. If not routed to the stereo master, the signal at the Direct
Output will be the stereo mix.
PPRREE
The Direct Output is normally post-fade, but may be selected as pre-fade by
pressing the PRE switch. When the channel is switched to TELCO, the function of
the PRE button is disabled.
TTBB
Pressing TB allows talkback from the overbridge microphone XLR input to be
routed to the Direct Output.
AAUUXXIILLIIAARRYY SSEENNDDSS
There are four AUXILIARY SENDS with individual level controls. Aux 1, 2 and 3
carry a mono sum of the channel signal and Aux 4 is fed in stereo. All Aux Sends
are normally post-fade, but may be selected as pre-fade by pressing the associated
PRE switches. The pre-fade source for Aux 1-3 is normally post-mute, but may be
selected as pre-mute by changing internal jumpers. Aux 4 pre-fade source is
always pre-mute.