Presentation on theme: "TIA-1083 Wireline Telephone HAC Performance Requirements With a Comparison to C-63.19 Wireless Telephone HAC Magnetic Performance Requirements."— Presentation transcript:
TIA-1083 Wireline Telephone HAC Performance Requirements With a Comparison to C Wireless Telephone HAC Magnetic Performance Requirements
2 ANSI/TIA Telecommunications – Telephone Terminal Equipment – Handset Magnetic Measurement Procedures and Performance Requirements Approved March 21, 2007 Developed by TIA TR-41.3, Analog and Digital Wireline Terminals
3 Overview Addresses magnetic interference issues identified by hearing aid users. RF interference does not appear to be a significant issue for cordless telephones.
4 Requirements Summary Signal Sensitivity: -22 dB (A/m) at 1000 Hz, Perpendicular -27 dB (A/m) at 1000 Hz, Transverse Same as Part 68, but greater latitude allowed in measurement location. Harmonic Distortion: 10%, Perpendicular and Transverse Frequency Response: Same as Part 68 and C63.19, Perpendicular.
5 Requirements Summary (cont) A-Weighted Noise: -40 dB (A/m), Perpendicular and Transverse Measured same as in C63.19 using half-band integrator. Signal-to-Noise Ratio: 45 dB, Perpendicular and Transverse Approximately equivalent to 30 dB requirement for C63.19.
6 Requirements Summary (cont) Signal-to-Noise Ratio (cont) Noise is measured same way for both standards. Signal in C63.19 represents nominal level speech input (see Footnote 45). Signal in TIA-1083 is same as in Part 68 and is approximately 15 dB above the average level (see paragraph 2.4 in EIA RS-504 as reproduced in 47 CFR ).
7 Perpendicular Measurement
8 Transverse Measurement
SHHH Cordless Study Figure C.3 from TIA-1083
HLAA Parametric Study Figure D.3 from TIA-1083
11 RF Interference ?? Informal FCC Complaints received by cordless telephone manufacturers were from T-coil users. RF power level typically 200 mW SHHH Cordless Study included 27 people who used T-coil coupling and 5 who used acoustic coupling to the microphone.
SHHH Cordless Study
13 Contact Information Stephen R Whitesell TIA Representative to C63 Chair, TIA TR-41 Senior Technical Consultant Standards, Regulatory and Intellectual Property Matters VTech Communications Tel: