Clock Rate (Digital Sync.); Eight Position Switcher; Control Wiring; Mute And Timer Reset Bus Connections - Radio Systems Millenium-D Installation And Operation Manual

Radio Systems Millenium-D Digital Console
4.2.4

Clock Rate (Digital Sync.)

The console internal sample rate and digital output sample rate (which are always the same) are internally generated
and crystal set at a factory default of 44.1 kHz. The rate can be changed by exchanging crystal Y2 and re-setting
jumper JU-10 on the digital output board. Contact the factory to order crystal Y2 with a different sample rate.
External (house sync) in AES/EBU format can be feed to the console via RJ-45 connector J-28. LED D-9 illuminates to
indicate external sync. When external sync is present, the console will default this external reference. If the external
sync is removed the console will automatically revert to the internal crystal reference. Consult illustration O-5 or O-6 for
connector locations for internal location and pin outs.
4.2.5

Eight Position Switcher

Eight accessory switchers are provided on the right hand side of the console upper control panel for optional user con-
trol of external equipment, console accessory boards and mix-minus sends. The switches and their associated LED
indicators are wired directly to the digital output board and read by the digital processor. Connections for accessory
boards and special external switching are then made directly to connectors J39 and J43 on the digital output board.
Consult diagrams O1and O2 in the digital output board section for more information.
Consult the "8 Position Switches" page in the "Software" section of this manual for optional switch functionality assign-
ment.
4.3

Control Wiring

4.3.1

Mute and Timer Reset Bus Connections

A five position quick-connect type barrier strip is connected to Mute/Timer header J7 on the Output Board to provide
external mute and timer reset functions. Note that clearance may not exist for this connector to be installed with side
wire entry. In this case the connector may be plugged using it's side-entry pins and with the wires entering from the top.
The bus outputs are open collector current sinking outputs, maximum +24vdc open circuit voltage, 80ma. If the buses
are to drive external relays, install EMF suppression diodes across the relay coils. Do not exceed 150ma draw from the
+15v supply.
An interface relay is optionally available from Radio Systems. Illustration D3 shows the wiring of this relay for external
tally lights.
The Timer Reset Bus activates only during the first 100ms after a mixing channel, with its Timer Reset Jumper(s) in-
stalled, is placed in the "on" mode. Repeated depressing of the "on" switch after the mixing channel has turned "on"
will result in additional pulses on the Timer Reset Bus.
4.4

Talk Back Connections

The talk back circuit has two sections, send and receive. The send section will output any signal applied to its input
when the front panel Talk Back Switch is depressed. Send and receive signals are normally wired to External Cue Bus
connector J37. Trim pots on the Analog Output Board (accessible through holes in digital output board) are provided
to set the external cue input level and talk back output level.
Talk back connections are made via 2 five position terminal strips, titled "To Talk Back Output" header J36 and "Talk
Back Input" header J37 on the Analog output Board.
Talk Back Output connector J36 also contains terminal 4 labeled "CTL", which is pulled low whenever the front panel
talk back switch is depressed. This is useful for switching external intercom or control circuits. It may also be used to
remote trigger the console front panel Talk Back switch.
Illustration D-4 shows how this configuration would be used to wire two Millenium Consoles for talk back communication
utilizing a utility bus and the cue circuit external inputs.
Under normal applications, the output of a Utility bus configured for pre-fad-
er pre on/off switch is wired to the talk back send input terminal on J37. This
is accomplished by wiring the selected Utility bus output channel to terminals
1 & 2 of the Talk Back connector.
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