20
Making Measurements
Press
RESET
after you check the maxi-
mum or minimum sound level. The meter
resumes a normal continuous average or
maximum measurement.
CHECKING STEREO
SYSTEM ACOUSTICS
To check the sound of a stereo system,
use a test recording that produces pure
tones, one at a time, at intervals that span
the entire audio spectrum.
Use C-weighting with either slow or fast
response.
Make a graph or table that shows the
sound level each tone generates. This
gives you a clear idea of the frequency re-
sponse of the total audio system – includ-
ing the room. To smooth out the
response, adjust the tone control, vary the
speaker placement, and use a frequency
equalizer.
CALIBRATING THE METER
The recessed calibration control (labeled
CAL
on the meter’s left side) is intended
for service technicians only.
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