Download Broadcast Profanity Delay

Chapter 2 Operation
This chapter describes how the BD600 is operated from the front panel using factory default configuration values. Optional remote control and configuration are described in later chapters and appendices.
Installation
Rack Mount
The BD600 should be mounted in a standard 19-inch rack using washers to avoid damaging the front
panel overlay. The rack should be well ventilated and in a dry and dust-free environment so heat and
moisture won't cause damage or degradation of performance. If rack units above or below the BD600
are hot a suitable gap should be left to allow cooling.
Connect AC and Turn On Power Switch
The BD600 will automatically configure itself to operate over an AC supply voltage range between
100V and 240V, 48-62Hz.
Since the unit is electrically out of the audio path when in bypass mode (unless configured otherwise),
there is normally no reason to need access to the rear panel power switch. The power-up mode is selected by the configuration and is the same regardless of whether power is applied via the rear panel
switch or via connecting the AC to an already switched-on unit. The unit may be left powered on even
if the rack's power is to be disconnected.
Immediately after the unit is switched on, the front panel will be fully illuminated. After a second, the
display will change to show LOAD, followed by the software version number. At this time the unit will
read the front panel buttons. If any buttons are pressed, the unit will perform a special start-up function
(see Appendix D). If no buttons are pressed, the unit will complete its start-up, showing LOAD again. After a second, the display will show −−−and the BYPASS button should be illuminated. This combination of LEDs indicates that the unit is powered on and in bypass mode.
⇒
Note that the BD600 can be configured to go immediately into on-line mode - see Chapter 3 for details.
Level Meters
There are two 10-segment LED bar graphs to display input level information. These graphs act as meters and may be used to align the equipment so appropriate audio levels are presented to the BD600.
The meters indicate the levels at the digital signal processor and are calibrated in decibels. The top
LED is red. The next two are yellow, and the bottom seven are green.
The red LED is lit if the level is above +24dBu. The remaining LEDs indicate approximately -3dB, 6dB, -9dB, -12dB, -15dB, -18dB, -21dB, -24dB, -40dB below the +24dBu reference level. Before
V1.4 the above reference level was the BD600’s clip point, about 26dBu.
When the BD600 is being operated correctly, most of the LEDs will be lit (NOT the
red one) when a loud signal is being received. The next section describes the gain
adjustments that may be used to achieve this.
Note that the meters show the signal level AFTER the input gain control, so if a
VERY high level signal is applied when this control is set to attenuate, it is possible
to overload the inputs without this being visible on the meters.
BD600 Profanity Delay
Document Version 1.6
Chapter 2 Operation
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