Larson Davis 824 User Manual

9-10 824 Reference Manual 9/29/09
Selecting the Range Setting When the range is highlighted as shown in the above
graphic, the range can be toggled between Normal and Low
by pressing the ror lkeys. If the approximate level is
known, select the range setting for which that level falls
nearest the middle of the measurement range. If it is not
known, select the Normal range which is usually adequate
for the majority of common measurements.
The range setting can also be selected using the setup menu.
In fact, this is the only way to select the High range.
Press the S key, the rkey, highlight SLM, press the c
key, highlight Range, and press the c
key to obtain the
following display
Highlight the desired range and press the c
key to make
the selection.
SSA Mode
The SSA Mode has a smaller measurement range than the
ISM and LOG Modes. As a result, rather than select a range
setting from among three choices, as done for the ISA and
LOG Modes, we will select a gain value which can range
from -20 to + 50 dB in steps of 10 dB. The usual practice is
to set the gain to 0 dB and later modify that as required to
obtain a good measurement without overload or under range
conditions.
Although the gain setting does not usually appear on the
SLM display, it can be found by repeatedly pressing either

Larson Davis 824 Specifications

General

Brand	Larson Davis
Model	824
Category	Measuring Instruments
Language	English