Larson Davis System 824, Reference Manual

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9/12/00 System 824 Virtual Instruments 5-3
Selecting an Instrument ID
To select one of the System 824 instrument setups or IDs, do
the following:
There will be a ‘>’ to the left of the
currently enabled instrument ID. The
current ID will generally also
remain at the top of the list. If the
user changes the ID that is in use,
the current ID will then have an ast-
erick to the left of the title. Step 1 Press the
S
SETUP key. A menu similar to the
following appears:
Step 2 Select the desired ID from the menu by using the
u
or
d
keys to highlight it, then press the
c
key to select it. That instrument’s main display
will appear:
Combined SLM&RTA
There are applications which call for the simultaneous mea-
surement of both the sound pressure level and the real-time
frequency spectrum. Very often you will wish to measure the
weighted (A, C or Flat) sound pressure level while simulta-
neously measuring the unweighted frequency spectrum.
For these applications, the System 824 provides the SSA
instrument.