Audio Precision Portable One Plus Access User Manual

will display the amplitude of the selected channel divided by the
amplitude of the reference channel.
The upper center section of the display shows the amplitude of the
reference channel. The upper center soft key selects the display units.
The usual set of relative and absolute units are available.
The upper right section of the display can show the frequency of the
reference channel or the phase of the selected channel relative to the
reference channel. Frequency is displayed in Hz and phase in degrees,
in the range of –180 to +180 degrees.
Pressing INPUT A or INPUT B will select the chosen channel for
measurement, with the other input channel as the reference. Pressing
GEN will use the gen-mon signal for the same channel as the
reference.
The lower left soft key is used to optimize the use of the meters. There
are two meters used for a ratio measurement, and one of the two loses
accuracy below about 8 mV. Therefore, it is necessary to restrict one
of the two measured amplitudes to values above 8 mV.
You can choose which amplitude is restricted to higher values using
the lower left soft key. If the display reads ‘MODE 1’, then the channel
used for the denominator value (the ‘downstairs’ value in the fraction)
should not be less than 8 mV. If the display reads ‘MODE 2’, then the
channel used for the numerator value (the ‘upstairs’ value in the
fraction) should not be less than 8 mV. MODE 1 is the same as older
Portables which did not have this feature.
If both measurements are well above 8 mV, then the MODE setting
does not matter. If both are below 8 mV, the reading will not be valid.
If the restricted meter reads below 8 mV, the display will read ‘Low’.
A table summarizing this information is shown on the following page.
& For more
information on
amplitude units, see
page 4-71.
4 Operation
Operation Controlling the Analyzer : Ratio
4-46 Portable One Plus Access User's Manual
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

Audio Precision Portable One Plus Access Specifications

General

Brand	Audio Precision
Model	Portable One Plus Access
Category	Test Equipment
Language	English