Stewart Audio CVA50-1 Priority PA - Manual (Page 9)

16
3.2 Controls, Indicators, and Connectors
CVA50-1 PA
11 2 3 5 6 7 4
1 Speaker Out Connector
2
Power Connector
3 Clip Indicator LED
5 Power Indicator LED
6
Remote Volume Control
8 3.5mm Input #2
4 Signal Present Indicator LED
9 Ducking Sensitivity Knob
9 8
10 10
11 11
10 10 Local Input Level Knob
11 11 25V Paging Input
12 12 Mic / Line Input
12 12
13 13
14 14
7
RCA Input #1
13 13 Paging Input Level Knob
14 14 Mic Gain Hi / Low Switch
17
3.2.1 Indicators
The CVA50-1 Priority PA amplifiers have three rear panel LEDs to indi-
cate the status of the amplifier. The blue LED, labeled “ON”, will be lit
when the unit is not in sleep mode. The green LED, labeled “SIG”, will
light when an audio signal is present on the audio input. When the unit
is operating with both green and blue LEDs lit and the audio input sig-
nal goes away or is removed, the green “SIG” LED will go out and the
unit will continue to operate with the blue LED on for approximately 5
minutes before going into sleep mode. When signal is present and out-
put is going to the speakers the red LED, labeled “Clip”, will light when
the input signal is too hot. The “LEVEL” control must be adjusted until
the CLIP LED goes out for undistorted sound amplification.
3.2.2 Controls
The CVA50-1 Priority PA controls are located on the rear of the unit.
There is no power switch so the amplifier will power up into a sleep
state when power is first applied. The CVA50-1 Priority PA Signal
Sense Technology (SST™) will power up the amplifier from sleep
when a signal is detected. After 5 minutes without an input signal the
amplifier will go into sleep mode.
The rear panel contains two volume knobs. The amplifier is set to run
off of a line-level source and the level should be adjusted for optimum
performance. To adjust this knob, you will need a small flat-head
screwdriver. While a typical program source level is present, spin the
rotary knob as far clockwise as you can without hearing distortion or
without the “Clip” indicator illuminating. If the signal is distorting and
the knob is all the way counter-clockwise, adjust the gain down at the
source level.
The “Mic Gain” setting will adjust for the sensitivity of the microphone
by different manufactures beyond what the volume control offers. If
the microphone is generally too loud, select the “High” setting by slid-
ing the switch to the right. If the microphone is generally too quiet, se-
lect the “Low” setting by sliding the switch left.