doc.: IEEE g Submission March 15, 2011 Steve Jillings, SemtechSlide 1 Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [LB-67-MR-FSK-transmit-spectral-mask-comment-resolution] Date Submitted: [15 March 2011] Source: [Steve Jillings] Company [Semtech] Address [200 Flynn Rd, Camarillo, CA, 93012] Voice:[ ], FAX: [ ], Re: [] Abstract:[] Purpose:[To assist with comment resolution for LB #67 for MR-FSK Radio Specifications] Notice:This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release:The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P

doc.: IEEE g Submission March 15, 2011 Steve Jillings, SemtechSlide Transmit Spectral Mask CID #293 –Transmit spectral mask is too loose. Rather than argue over the correct spectral mask, defer to regulatory bodies. Proposed Change –Delete Section from the d3 draft standard and remove all references to it Recommended Resolution –Accept

doc.: IEEE g Submission March 15, 2011 Steve Jillings, SemtechSlide Transmit Spectral Mask Text The transmit spectral content is the ratio of the total transmitted out-of-channel power to the total transmitted in-channel power in a given integration bandwidth. The frequency interval shall be equal to 1.5 x R, where R is the symbol rate, expressed in units of hertz. Out-of-channel power shall be measured at two offset frequencies relative to the carrier frequency. The offset frequencies M1 and M2 are defined as follows: M1 = 1.5 x R x (1+h) where –h is the modulation index for 2-level modulation and three times the modulation index for 4-level modulation M2 = 3 x R x (1+h) The transmit spectral content at M1 and M2 shall be less than –25 dB and –35 dB, respectively. The modulated signal shall use a PN data pattern of 511 bits or longer. The spectrum analyzer settings for this measurement shall be as follows: the resolution bandwidth is 1 kHz, the video bandwidth is 1 kHz or greater, and the detector is RMS

doc.: IEEE g Submission March 15, 2011 Steve Jillings, SemtechSlide Transmit Spectral Mask Regulatory Information Regulatory requirements in both the EU (ETSI EN v2.3.1) and Japan (ARIB T-96 v1.1) are more stringent than proposed standard and are unlikely to be relaxed N.A. ISM Band? –FCC Part (a)(1) –FCC Test Methodology (DA "Filing and Measurement Guidelines for Frequency Hopping Spread Spectrum Systems“) –Similar rules for Industry / Industrie Canada RSS-210

doc.: IEEE g Submission March 15, 2011 Steve Jillings, SemtechSlide Transmit Spectral Mask Case BR = 50 kb/s, h = 1, channel spacing = 200 kHz –R = 25 kHz –M1 = 1.5*R*(1+h) = 1.5*25*(1+1) = ±75 kHz –M2 = 3*R*(1+h) = 3*25*(1+1) = ±150 kHz Case BR = 200 kb/s, h = 0.5, channel spacing = 400 kHz –R = 100 kHz –M1 = 1.5*R*(1+h) = 1.5*100*(1+0.5) = ±225 kHz –M2 = 3*R*(1+h) = 3*100*(1+0.5) = ±450 kHz

doc.: IEEE g Submission March 15, 2011 Steve Jillings, SemtechSlide Transmit Spectral Mask Case BR = 50 kb/s, h = 1, channel spacing = 200 kHz –R = 25 kHz –M1 = 1.5*R*(1+h) = 1.5*25*(1+1) = ±75 kHz –M2 = 3*R*(1+h) = 3*25*(1+1) = ±150 kHz < 5 dB Margin to FCC Limits FCC Spectral Mask 15.4g Spectral Mask > 10 dB Margin to 15.4g Mask

doc.: IEEE g Submission March 15, 2011 Steve Jillings, SemtechSlide Transmit Spectral Mask Case BR = 200 kb/s, h = 0.5, channel spacing = 400 kHz –R = 100 kHz –M1 = 1.5*R*(1+h) = 1.5*100*(1+0.5) = ±225 kHz –M2 = 3*R*(1+h) = 3*100*(1+0.5) = ±450 kHz FCC Spectral Mask 15.4g Spectral Mask < 15 dB Margin to FCC Limits 20 dB Margin to 15.4g Mask