Larson Davis 824 User Manual

13-10 824 Reference Manual 9/29/09
Linearity RTA Display
The Linearity RTA display can also
be accessed from the View Menu as
shown in "View Menu" on page 13-5.
The Linearity RTA display, shown below, is accessed from
the Any Level a and b Displays by pressing the down arrow
key d.
The Linearity RTA display shows the level of the highest
fractional octave RTA data relative to a set reference level.
Also shown are the filter frequency of the selected level and
the RTA Bandwidth setting. The frequency weighting set by
the RTA Weighting setting is used; Flat by default. For
testing attenuator linearity at 1 kHz, it is recommended to
use A weighting to reduce low frequency ambient noise that
my be coupled into the microphone.
Set the reference level to the current level by pressing the
check key c. This will open the Linearity RTA check menu,
shown below.
Highlight “Set Reference” and press the check key c
again.
The reference can also be set to an absolute level using the
"Reference Lvl" setting on the check menu.

Larson Davis 824 Specifications

General

Brand	Larson Davis
Model	824
Category	Measuring Instruments
Language	English