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Worst case duty cycle is computed because coded pulse position type A1D modulation is used. Data
rate is seventeen 500 uSec pulses in any 100 mSec. time window.
During transmission, the transmitter sequentially emits a group of 17 encoded pulses in the form of a
pulse-keyed carrier. The data stream consists of preamble and encoded data string.
REAL TIME ANALYSIS:
Description
Total Transmission
In compliance with FCC Rules 15.35(c), the following duty cycle factor is used for all field strength
calculations. A 100 mSec. full word time window is selected with the worst case programmable on time
ratio.
8.5 E-3 On time
100 E-3 Total time
20 log (8.5E-2) = -21.4 dB
Transmitter Duty Cycle Calculations
and Time Domain Information
DX / DXS Data Format
Total Time
17 x 500 uSec. = 8.5 E-3 Sec on time
= 8.5 E-2 on time per 100 mSec. time window
20 dB Duty Cycle Ratio (Per FCC Rules)
LINEAR LLC
FCC ID: EF4 SST00116
"On" Time
SECTION 7
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