Each of the following tracks produces a low-frequency test tone.When finished, press Skip ??I to advance to the next test. Repeat
The range of these tests is from 100Hz down to 20Hz.Thethe process described above for Tracks 5 through 26.
frequency of each test is announced before it begins.The first
test is the highest frequency (100Hz); therefore, you will beWhen you have completed the 23 measurements, you are ready to
marking the template from right to left. Each frequency point isanalyze the data and make corrective adjustments.The completed
listed across the bottom of the Measurement Template (this isMeasurement template will look something like the example in
called the X-axis). See Figure 6 on the previous page.The verticalFigure 9.
scale on the left side of the template indicates relative level, in
dBs (the Y-axis).The templateOs vertical scale matches that of the
RSLM bar graph.
Cue Track 4 and Pause II.
From now on, you will want to keep your CD playerOs
remote control handy.
Press Play?. As Track 4 plays, observe the level indicated on
the RSLM.
EXAMPLE:The test frequency is 100Hz and the level indicated is
�2dB. Find the intersection of 100Hz (X-axis) and �2dB (Y-axis).
Place a dot at that point. See Figure 7.
Figure 9.Completed R.A.B.O.S.template
Now connect the dots as shown in Figure 10.
This will make interpretation of the data much easier.
Figure 7.Locating a test point
It takes a few seconds for the RSLM reading to stabilize,
especially at very low frequencies. DonOt rush. Give each test
adequate time for the meter to stabilize.
At the bottom of the bar graph is a green OON�LED.This LED is
illuminated whenever the sound level is below the measuring
range of the RSLM. If this occurs during a test, place a dot at the
intersection of the test frequency and the bottom frame of the
template. See Figure 8.
Figure 10.Test example with dots connected
2
Figure 8.Indicating an under-range test
CSW-108 |
ACEC
