CFS8DL5816MN2Security / Remote Control Transmitter

COVER LETTER RE: CORRECTING FCC ID # TO: Bette Taube [email protected] Sir, there is a problem with my CFS ID # , CFSCFS8DL5816MN2 , needs to be corrected to : CFS8DL5816MN2 Many Thanks in advance, Greg Barbato [email protected] (ADEMCO) (516) 921-6704 X-6920

EXHIBIT 3 CFS8DL5816MN2 5815 - Duty Cycle Calculation Message protocol, timing and duty cycle calculation. The data output is phase-encoded Manchester that has inherent 50% duty cycle and consists of 64 bits per word A supervision transmission is six identical words separated by (start to start) by nominal 125mSec (100 mSec min, 150 mSec max). Each message has a nominal data rate of 3.7 kb/s (3.2kb/s min to 4.2kb/s max). Therefore the duty cycle is calculation is as follows: The word format consists of 64 bits, The duration of each bit is 312.5 uSec max. The duty cycle over a 100 mSec measuring period is calculated as follows: Duty cycle = Actual RF transmission ON time / 100 mSec Actual transmission ON time = 64 bits X 50% X 312.5 uSec = 10 mSec Therefore duty cycle = 10 / 100 mSec = .10 = 10%, and peak to average field strength is 20 db. Total on-air time for a supervision transmission is: 64 X 312.5 uSec + (5 X 150 mSec) = 0.77 seconds In the case of an alarm transmission, the group of six transmissions is repeated twice, with the second group delayed from the first by a max time of 2 seconds. The worst case on-air time is 2 X (supervision time) + 2 = 3.54 seconds Summary: - Duty cycle = 10% On airtime = 3.54 seconds

EXHIBIT 6 CFS8DL5816MN2 Test Equipment list 1. Antenna: RGA-60 S/N: 3127 Cal. on: 02/16/00 Cal. due: 02/16/01 2. Antenna: Roberts Dipole Set S/N:110 Cal. on: 02/16/00 Cal. due: 02/16/01 3. Spectrum Analyzer Tektronix 2784 S/N:B010165 Cal. on: 08/05/99 Cal. due: 08/05/00