Infinity CLASSIA PSW310W Owner's Manual page 11

Each of the following tracks produces a low-frequency test
tone.The range of these tests is from 100Hz down to 20Hz.The
frequency of each test is announced before it begins.The first
test is the highest frequency (100Hz); therefore, you will be
marking the template from right to left. Each frequency point is
listed across the bottom of the R.A.B.O.S. Measurement Template
(this is called the X-axis). See Figure 6 on the previous page.
The vertical scale on the left side of the template indicates
relative level, in dBs (the Y-axis).The template's 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 player's
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 7. Locating a test point
It takes a few seconds for the RSLM reading to stabilize,
especially at very low frequencies. Don't rush. Give each test
adequate time for the meter to stabilize.
At the bottom of the bar graph is a green "On" 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 8. Indicating an under-range test
When finished, press Skip
the process described above for Tracks 5 through 26.
When you have completed the 23 measurements, you are ready to
analyze the data and make corrective adjustments.The completed
R.A.B.O.S. Measurement Template will look something like the
example in Figure 9.
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 10.Test example with dots connected
2
›› I to advance to the next test. Repeat
INFINITY CLASSIA PSW310W (120V) 8