126 FONIX FP40 Portable Hearing Aid Analyzer
Tolerance +/- 0.01V, no load.
Battery Type Selection Under software control from front panel, but proper size battery
pill must be selected.
DIGITAL READOUT OF SPL
Frequency Range 200 Hz through 8000 Hz.
Amplitude Range 0 dB SPL through 149.9 dB SPL, -70 dB through +100 dB gain.
Max Input Signal 150 dB SPL.
Resolution 0.1 dB.
Type True RMS if Source is set to “off ”.
Accuracy From 250 Hz to 2500 Hz, 2 dB +/- one digit. All other frequen-
cies, 3 dB +/- one digit.
SYSTEM NOISE
Equivalent Input Noise 50 dB SPL RMS.
Noise Reduction Averages the measured signal in synchronism with the signal
generator by the factor chosen. Averaging factors from 2 to 16
available in powers of 2. Random noise will be reduced by an
amount equal to the inverse square root of the factor chosen.
HARMONIC DISTORTION ANALYSIS
Type 2nd, 3rd, and 2nd + 3rd = total.
Resolution 0.1 percent.
Reading Percent with respect to total signal. Readings made at frequencies
from 400 through 2500 Hz.
POWER REQUIREMENTS
Voltage 90 VAC to 264 VAC.
Frequency 50 Hz to 60 Hz.
Power Dissipation 40 VA at 120 VAC, 60 Hz input, normal operation
SAFETY UL approval; UL 554 approval upon request
BATTERY OPERATION
(optional)
Remote Operation Requires optional battery power module. Operation possible for
3 hours continuously on battery power (with new battery at 25
degrees C.).
