Larson Davis System 824, Reference Manual

Page: 203 / 536

11/8/00 Using ID Setting Files 7-23
This setting can include any integer value within the follow-
ing range:
0 to 9dB
LOG and SSA Time History Settings
Time History Settings are available
to both the Logging SLM (LOG) and
SLM&RTA (SSA) instruments. The time history recording stores an L
EQ
, and if desired, one
or more additional user-selected measurements, such as Lpk
or Lmax. Levels can be stored rapidly, up to 32 samples per
second with the LOG instrument and 8 samples per second
with the SSA instrument. Since this function continues stor-
ing data as long as the measurement is in progress, the com-
bination of a fast storage rate and a long measurement time
can consume a large amount of data memory.
Use the
u
and
d
keys to move
from one setting to the next. Then use
the
r
key to change the selected
setting. The
l
key is used to
return to previous menus.
The following tables show the Time History settings for the
LOG and SSA instruments. Each setting is described later in
greater detail.
Hysteresis
Begin
End
dB
Trigger
Time
Menu Items
(LOG
instrument)
Available Settings Options
Hist Enable No
Yes
Hist Period 1 to 255