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4.8 B400 Functional Description
When the input is in line level mode and the CUE switch is pressed, this will
(optionally) trigger the remote start/stop facility which has two sets of relay con-
tacts, available via the rear panel D-type connector. These relays can be set to
either latching or pulsed operation via internal jumpers, enabling most types of
machines to be remotely started and stopped.
Under no circumstances should mains voltages be placed on the
contacts of the remote Start/Stop relays.
When both CUE and ON are selected, the cue will (optionally) be cancelled auto-
matically and the signal will be live, provided that the fader is already raised. If the
fader is down, the cue will only be cancelled when raised from its end position.
Line B (TLCO) mode
In this mode the Start B relay (pulsed or latching) is used as a DIVERT or
HYBRID latch. This is initially activated from the Cue function to set up a call or
remote line with a clean feed return. Switching the channel ON will maintain this
relay closure, ensuring that the line is held while the fader is opened. Closing the
fader will drop the line from the hybrid.
MMEETTEERR
The 8-segment LED meter may be set to pre-fade (post Mute) or pre-EQ by an
internal jumper.
PPKK ((PPeeaakk))
The 3-input PK LED monitors pre-EQ, post-EQ and post-fade signal levels. If any
of these points rises to 6dB below clipping the LED will illuminate.
FFAADDEERR
The VCA Fader controls the final channel level after the Pan/Bal but before the
Routing with10dB of gain in hand. External VCA control of the fader is available via
the D-type connector on the rear panel if required.
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The modules output may be routed to any or all of the pairs of Group busses(1-2,
3-4, 5-6, 7-8), or the stereo master bus (ST), subject to the position of the PAN
control (see 14 above).