PAGE
REVISION:
DATE:
VAN'S AIRCRAFT, INC.
04/03/14
42D-30 RV-12
REVISION:
REVISION:
2
DATE:
DATE:
FIGURE 1: SKYVIEW VOLUME CONTROL
Stall
Com 2
Xpndr
AutoP
Com 1
Nav
EFIS (R)
EFIS (L)
Aux 2 (R)
Aux 2 (L)
Aux 1 (R)
Aux 1 (L)
Volume max
Volume off
Volume off
Volume off
Volume max
Volume off
Volume 3 turns CCW from off
Volume 3 turns CCW from off
Volume off
Volume off
Volume max
Volume max
NOTE: This page describes how to make final adjustments to obtain the best performance from the audio mixer.
Before starting remove any outside voltage sources such as a battery charger.
What is an audio mixer? The design intent of an audio mixer is to combine audio signals together from many
different sources into one balanced signal that then will be fed into an intercom. The potentiometers over which you
have control first reduce each audio signal, the signals are combined then amplified back to a useable output level
for the intercom.
The following is a list of the factory preset levels for the audio mixer. Levels are preset at the factory and should
work well "out of the box". Levels are included here for future reference.
Volume max = 25 turns counter clockwise (CCW)
Volume off = 25 turns clockwise (CW)
Turning more than 25 turns will ensure the max or off condition.
Step 3: Plug a headset into the pilot headset jacks. If the headset has volume control adjust the volume to the middle of the range.
Turn on all audio devices connected to the board. Use a local ATIS or AWOS for radio input.
Step 4: Adjust the radio volume knob to full volume. Adjust the Com 1 sound level potentiometer on the AV-50000A Control Module
until the radio is too loud and slightly distorted.
Step 5: Install the AV-50000A back onto the F-1202B Panel Base as shown in Section 42M.
Step 1: Plug in and turn on a music device such as an iPod to the auxiliary music jack. Set the output volume of the device to
75% of full. Practice turning the potentiometers that control the Aux 1 (L) and Aux 1 (R) levels. Become familiar with the feel
when tool is actually engaging the potentiometers and changing the output volume.
Notice that a very small range (possibly 6 depending on the music device you are using) of the pots 25 available turns are
useful. Going back to the description of an audio mixer this means that some audio signals may need large reductions (more
turns of the potentiometer) to match the strength of a weak audio signal.
Step 2: When you are comfortable adjusting the potentiometers make the following changes to the EFIS (L) and EFIS (R)
levels. The goal is to maximize the EFIS alert output level while minimizing the background noise. There are background
"noises" inherent to SkyView. By turning the EFIS (L) and (R) levels down as far as possible the "noise" is reduced as much
as possible. To make the EFIS audio alerts loud enough to hear, turn the volume output up within the SkyView itself. Note
the SkyView volume control only affects the volume of the alerts not the "noise". We have then minimized the noise while
maximizing the audio alert volume.
Enter the Audio Setup menu within the SkyView display and set the Volume Control / Test to 100%. See Figure 1. If the
audio from the display sounds distorted the audio mixer potentiometers in the control module are now set too high.
Slowly turn both the EFIS (L) and (R) levels down 1/2 turn at a time until the distortion disappears. Note that if the volume
disappears altogether you have turned the potentiometer completely off. Turn the potentiometer back CCW until the volume
comes back.
It may not be possible to obtain the perfect level setting. In this case turn down the volume within the display to remove the
last hint of distortion. This should result in a sound level of 80% - 100% within the screen. The closer to 100% the quieter the
"noise" will be.
Now that the setup has been maximized and distortion removed turn the screen volume level down even further if the
maximized level is too loud for your combination of hearing health and headset quality.
