Test Report pages 10 through 14

FCC ID: CB2SAHL3

Test Report

Download: PDF
FCCID_83267

Test report #09800271F FCC 15.231 for VC4968 FCC ID: CB2SAHL3 Tested December 22, 1999 Test Data [2.1033(b6)] Modulation Characteristics Typical encoding at 310MHz: Consisting of pulses of differing duty cycles. 310MHz, 500Hz Modulation, 30% duty cycle AHD EMC Lab, 92723 M152, Dowagiac, MI 49047, (616) 424-7014 83267 Exhibit K: Page 10 of 31

Test report #09800271F FCC 15.231 for VC4968 FCC ID: CB2SAHL3 Tested December 22, 1999 310MHz, 500Hz Modulation, 50% duty cycle 310MHz, 500Hz Modulation, 80% duty cycle AHD EMC Lab, 92723 M152, Dowagiac, MI 49047, (616) 424-7014 83267 Exhibit K: Page 11 of 31

Test report #09800271F FCC 15.231 for VC4968 FCC ID: CB2SAHL3 Tested December 22, 1999 Relative Emission Level vs. Supply Voltage [15.31(e)] The relative emission level as the supply voltage varied is presented in the charts below. TX OUTPUT vs. Voltage LEVEL DUT= VC4968, 310MHz, 80%duty cycle Volt In TX OutPut Pk dBuV/m 6 no-op 7 62.5 8 62.1 9 62.0 10 61.8 11 61.7 12 61.8 13 61.8 14 62.1 15 62.1 16 62.2 17 62.1 18 62.0 OUTPUT FIELD STRENGTH vs INPUT VOLTAGE [Tuned to 310MHz; Modulated at 500Hz, 80% Duty Cycle] 65 64 63 62 61 dBuV/m 60 59 58 57 56 55 6 7 8 9 10 11 12 13 14 15 16 17 18 Volts AHD EMC Lab, 92723 M152, Dowagiac, MI 49047, (616) 424-7014 83267 Exhibit K: Page 12 of 31

Test report #09800271F FCC 15.231 for VC4968 FCC ID: CB2SAHL3 Tested December 22, 1999 Occupied Bandwidth [15.231(c)] The maximum allowed 20dB bandwidth is determined pursuant to 15.23(c). For fundamental signals between 70MHz and 900MHz the bandwidth allowed is 0.25% of the fundamental. Formula 2: Allowed bandwidth = [ Fundamental ] x [ .0025 ] Fundamental Duty Cycle Measured LIMIT (MHz) 20dB Bandwidth Fundamental * .0025 288 30% 455 KHz 720 KHz “ 50% 470 KHz 720 KHz “ 80% 495 KHz 720 KHz 310 30% 475 KHz 775 KHz “ 50% 455 KHz 775 KHz “ 80% 455 KHz 775 KHz 390 30% 495 KHz 975 KHz “ 50% 495 KHz 975 KHz “ 80% 495 KHz 975 KHz 418 30% 505 KHz 1045 KHz “ 50% 495 KHz 1045 KHz “ 80% 480 KHz 1045 KHz This chart shows a typical measured bandwidth signal. AHD EMC Lab, 92723 M152, Dowagiac, MI 49047, (616) 424-7014 83267 Exhibit K: Page 13 of 31

Test report #09800271F FCC 15.231 for VC4968 FCC ID: CB2SAHL3 Tested December 22, 1999 Restricted Bands: [15.205] The following frequency bands are restricted. Only spurious emissions are permitted at levels limited by 15.209: MHz MHz MHz GHz 0.090-0.110 16.42-16.423 399.9-410 4.5-5.25 0.490-0.510 16.69475-16.69525 608-614 5.35-5.46 2.1735-2.1905 16.80425-16.80475 960-1240 7.25-7.75 4.125-4.128 25.5-25.67 1300-1427 8.025-8.5 4.17725-4.17775 37.5-38.25 1435-1626.5 9.0-9.2 4.20725-4.20775 73-74.6 1645.5-1646.5 9.3-9.5 6.215-6.218 74.8-75.2 1660-1710 10.6-12.7 6.26775-6.26825 108-121.94 1718.8-1722.2 13.25-13.4 6.31175-6.31225 123-138 2200-2300 14.47-14.5 8.291-8.294 149.9-150.05 2310-2390 15.35-16.2 8.362-8.366 156.52475-156.52525 2483.5-2500 17.7-21.4 8.37625-8.38675 156.7-156.9 2655-2900 22.01-23.12 8.41425-8.41475 162.0125-167.17 3260-3267 23.6-24.0 12.29-12.293 167.72-173.2 3332-3339 31.2-31.8 12.51975-12.52025 240-285 3345.8-3358 36.43-36.5 12.57675-12.57725 322-335.4 3600-4400 Above 38.6 13.36-13.41 LIMIT @ 3meter: [15.209(a)] 30-88MHz 100uV/m 40dBuV/m 88-216MHz 150uV/m 43.5dBuV/m 216-960MHz 200uV/m 46dBuV/m above 960MHz 500uV/m 54dBuV/m Verification of no capability to tune within the Restricted Bands. The unit is designed capable of tuning from 285MHz to 420MHz. These frequencies include the restricted areas of 322-325.4MHz, 399.9-410MHz, and is near the restricted area of 240- 285MHz. The restricted bands are locked out by the Homelink® III firmware. An exercise which attempted to train the units into the restricted bands demonstrated how well the firmware functioned. The unit could not be trained any closer to the restricted band area than 1MHz outside the restricted bands edges. The spurious emissions observed in the restricted bands did not exceed the allowed limits for the restricted bands. AHD EMC Lab, 92723 M152, Dowagiac, MI 49047, (616) 424-7014 83267 Exhibit K: Page 14 of 31


Document Created: 2001-04-25 08:25:37
Document Modified: 2001-04-25 08:25:37
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC