6500-CX Hearing Aid Test System - Frye Electronics

TABLE OF CONTENTS
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1. OVERVIEW ........................................................................................................... 1
1.1 Signal Generation Overview ...................................................................... 1
1.1.1 Digital Basis ..................................................................................... 1
1.1.2 Component Amplitude Weighting Considerations ........................ 2
1.1.3 Phase of the Components................................................................ 2
1.1.4 Special Distortion Measurements ................................................... 3
1.2 Signal Detection Overview ........................................................................ 3
1.2.1 Fast Fourier Technique .................................................................... 3
1.2.1.1 Windowing ........................................................................... 3
1.2.1.2 Aliasing ................................................................................. 4
1.2.1.3 Noise Reduction ................................................................... 4
2. SPECIFICATIONS ................................................................................................ 5
2.1 Electronics Module .................................................................................... 5
2.1.1 Frequencies ...................................................................................... 5
2.1.2 Amplitudes in SPL .......................................................................... 5
2.1.3 Source Output Amplitude Accuracy (all modes) ........................... 6
2.1.4 Crest Factor of Composite Signal .................................................... 6
2.1.5 Telecoil Drive ................................................................................... 6
2.1.6 Digital Readout of SPL .................................................................... 6
2.1.7 Battery Current Measurement ........................................................ 7
2.1.8 Harmonic Distortion Analyzer........................................................ 8
2.1.9 Attack/Release Time ........................................................................ 8
2.1.10 Power ............................................................................................. 8
2.1.11 Safety ............................................................................................. 8
2.1.12 Electrostatic Discharge and Electromagnetic Susceptibility ....... 9
2.1.13 Electromagnetic Emissions ........................................................... 9
2.1.14 Altitude .......................................................................................... 9
2.1.15 Humidity ....................................................................................... 9
2.1.16 Temperature ................................................................................... 9
2.2 Video Display Module ................................................................................ 9
2.3 Printer ....................................................................................................... 10
2.3.1 Alternative Printer......................................................................... 11
2.4 Sound Pressure Chamber ......................................................................... 11
2.5 Physical Description ................................................................................ 11
2.5.1 Electronics Module ....................................................................... 11
2.5.2 Video Display Module (Samtron) ................................................. 12
2.5.3 Sound Chamber ............................................................................. 12
2.5.4 Accessories size & weight (w/o probe) .......................................... 12
2.5.5 Accessories size & weight (with probe) ........................................ 12
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