Crest Audio NEXSYS - VERSION 3.0, Software Manual

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NexSys v. 3.0 Crest Audio Inc.
Amplifier Solo Control
Soloing a single channel is a useful troubleshooting tool. By pressing the solo button, all
other channels in the plan will mute, leaving this channel as the only audible one. As its
name implies, only one channel may be soloed at a time. Pressing another’s solo will mute
the first channel soloed and solo the second.
Although useful for troubleshooting, an inadvertent solo while the system is in use can put
the operator in an embarrassing situation. To prevent this situation Solo buttons may be
defeated by enabling the Solo Safety (see Section 9.5.) Solo Safety can be enabled or dis-
abled from the menu by selecting
Options | Solo Safety.
A word of advice; keep your job
- engage solo safety during regular operation.
Amplifier Polarity
The polarity control, labeled “Ø ” will invert the polarity of the channel.
Audio Return
Audio Return allows system operators at the control position to “listen in” to program mate-
rial delivered to remote locations. A line level signal of the output of each amplifier chan-
nel is made available on Load Monitor-equipped systems. The audio return lines from sev-
eral amplifiers can be bussed together and routed to a central control position. (Since the
signal is line level, a monitor amplifier and speaker will also be required.)
To enable a channel’s audio return press its monitor button, labeled “monit.” This button
can be found in the group console view.
Only one channel within a system may be monitored with audio return at a time. To moni-
tor a different amplifier, simply select the monitor button on that amplifier. The original
amplifier monitored will automatically be deselected.
CK family amplifiers have a Phoenix style connector on the NC-SLM Load Monitor mod-
ule which brings a line level signal out of the amplifier. With Pro class amplifiers, Audio
Return is available at a barrier strip on the rear panel of the Load Monitor main frame.
VU Meters
Each amplifier channel’s VU display contains two meters: input and output level. Both
meter’s scales can be changed and both meters show peak hold. The output meter’s peak
hold indicator turns red when the amplifier clips.
Input Scale. Double-click in this
area to cycle it through 4 scales:
· 0 to .5V
· 0 to 1V (shown)
· 0 to 100V
· 0 to 200V
Input Peak Hold
Input Meter Output Meter
Output Peak Hold (green) &
Clip Indicator (red)
Output Scale. Double-click in this
area to cycle it through 3 scales:
· -50 to 10dB from rated full scale
voltage (shown)
· 0 to 100V
· 0 to 200V
Page 9.2 Software Manual