9/12/00 B-41
son•Davis and the latest revisions of software utilize the pro-
tocol.
This setting is set to the noise floor of the instrument so that
it can properly indicate “Near Noise Floor” messages when
within 10dB of the noise floor. It is also used with NF Com-
pensate, Q208, which will place the System 824 in an
extended Linearity Range Mode. The true noise floor of the
entire system must be measured and entered in Q207. This
will vary with the selected input weighting or microphone
sensitivity. An equivalent microphone capacitance can be
used after calibration to determine the noise floor. It may
also be possible to remove the microphone bias to obtain this
value. When properly set up the linearity range can be
increased by 10dB.
NOTE: The mode is always turned off
with a CAL Change.
S206 Reserved setting
S207 ALL NOISE FLOOR LEVEL
S208 SSA, ISM,
LOG
NOISE FLOOR COMP MODE
S209 Reserved setting
S210 ALL AUX CONTROL REG
S211 LOG EXCD RECORD NUMBER
S212 SSA, ISM,
LOG, RTA
INTV RECORD NUMBER
S213 LOG HIST RECORD NUMBER
S213 RTA BYTIME HISTORY RECORD (NNNNN)
S214 LOG RUN-LOG RECORD NUMBER
S215 LOG DAILY RECORD NUMBER
S216 LOG CALIBRATION RECORD NUMBER
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