AudioControl SA-3052A, Руководство по эксплуатации

Страница: 42 / 64

SA-3052A Owner’s Manual
6-12
®
SA-3052
Setting Voltage Levels In Car Stereo
Using the SA-3052A RTA
Why Level Match?
Usually, high voltage levels in
audio systems, give better signal to
noise ratios. You want high signal to
noise levels so you do not hear the
thermal hiss which is present in all
audio systems
(sometimes even worse
in digital systems). As shown by
Diagram 1, you need the maximum
signal level to be below clipping but
as far as possible above the noise
floor.
Without a bunch of fancy instruments, how do you set all the levels in the sometimes
numerous components in a car stereo system? The answer is as close at hand as your
trusty real time spectrum analyzer.
How to Use the SA-3052A to Set Levels
1. Connect SA-3052A as shown (Diagram 2) with one channel of the output of the
unit you are setting plugged into Input 2. Note: you will need to unplug the microphone
or any other inputs.
2. Put the SA-3052A on digital SPL (hold the SPL button in for 2 seconds) with
input sensitivity level set according to voltage goal and table on the next page.
3. Play pink noise through unit you are setting. The best way to do this is to use
a pink noise CD or tape played from the
source unit. You can use the pink noise built
into the SA-3052A. For a pink noise CD,
our recommendation is IASCA Disc No. 2.
Chapter 6 - Getting the Last ¼ dB
Diagram 1
Diagram 2