Wheatstone D-8000, Техническое руководство

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D-8000 / Jan 2003
M E T E R B R I D G E
Replacement Parts
Timer card, VU meters card and replacement cue speakers are available. See
Appendix for specific ordering information.
Digital Timer
The console timer control buttons are located on the DMTR-8/DMTRS-8
module.
The timer is provided with an AUTO-RESTART function so programmed
input modules can automatically reset the timer display to zero and start a new
count (if the timer is currently running), allowing the announcer to easily track
his own pace.
The START/STOP button halts the timer, holds the last count, and then
restarts and accumulates the count when depressed again
—
perfect for compiling
tapes of desired duration.
RESET has a dual-mode capability:
- if you depress it while the timer is counting, the display will instantly reset
to zero and start a fresh count;
- if the timer is already stopped, depressing this button will reset the timer
to zero, where it will hold until start is pressed.
The HOLD button allows you to hold the display for a longer viewing
duration, while still allowing the counter to continue in the background.
Releasing the button will then display the current count.
Console Clock
The Wheatstone digital clock is a six-digit time-of-day clock with LED
display. The clock is designed with CMOS circuits and an on-board crystal-
controlled time base oscillator. The clock PCB contains the clock circuits, clock
set controls and capacitor backup on one side and displays on the other side.
Clock set controls may be accessed by opening the meterbridge cover.
Controls
The clock is controlled by two switches mounted on the bottom part of the
clock PCB assembly.
In order to keep accurate time, the oscillator must run at 32.768 KHz. The
oscillator is set to this frequency at the factory.
Setting the Time
The setting controls consist of two switches: MODE and SET. To set the
clock, open the meterbridge cover:
1) The control switches (mounted on the bottom part of clock PCB assembly) are
labelled "MODE" and "SET". "MODE" is used to scroll from seconds to
minutes to hours; "SET" is used to set the time. The procedure is to set the clock
slightly ahead of the current time, hold the second count at "00" until the
current time catches up, and then release the count.
D-8000 / Nov 2005