Coupler Measurements 89
Advanced Menu
For more advanced control of your unit, press [NEXT] to go to the Advanced
Menu.
*AUTO-SCALE—The type of scaling used. ON scales the graph to the selected
curve. OFF scales the graph to the highest curve displayed.
*REFERENCE STATUS—The type of RMS measurement made with the refer-
ence microphone. The following selections are available: RMS displays the
overall RMS of the reference microphone, FULL displays the overall RMS and
the signal quality of the reference microphone, and NONE turns off the RMS
display of the reference microphone. See Section 2.5.4 for more information.
*AVG FREQ—The three frequencies used for averaging in pure-tone measure-
ments. Each set is represented on the screen by the highest frequency in the set.
See Section 2.5.1.6 for details.
*STATIC TONE—Status of the static pure-tone measurement. When a pure-tone
source is selected and a sweep isn’t running, measure the response and distor-
tion of a single frequency (SINGLE), the three frequency average chosen in AVG
FREQS (AVG), or no measurement (NONE).
FILTER—The type of speech weighting used on the signal sources. In most
cases, this should be set to AUTO. See Section 2.5.2.1 for more details.
*SMOOTHING—Type of smoothing used. Smoothing rounds off the curve,
removing minor peaks. Usually only used for sound field measurements, this
should be off for normal coupler operation. Choose between OFF and LOG.
IM FREQ DIFF—The frequency difference of the two tones presented together
for the intermodulation distortion measurement. See Section 3.5.2.
*PREDELAY TIME—The delay after the first tone is presented and before the
first measurement is taken in a pure-tone measurement. See Section 2.4 for
more information.
*SHORT SETTLE—The time delay between frequencies in a pure-tone sweep,
and the additional delay in a digital speech signal.
*LONG SETTLE—The time delay between frequencies in an input/output mea-
surement, a three-frequency average measurement, or a harmonic distortion
measurement.
PRINT LABEL—Status of the printing label.
PRINTER— Printer used for printouts. Choose INTERNAL to use the built-in
thermal printer. Choose EXTERNAL to use an attached laser or ink-jet printer.
