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MODULATION Phase modulated 1.1 rad +/- .1 rad
POWER OUTPUT 5 watts +/- 2 DB (3.2 to 7.9 watts)
UN-MODULATED CARRIER time 160 Ms. +/- 1 %. That time commencing from the start of a
transmission to when modulation of the carrier is started.
MESSAGE BIT RATE 400 bps +/- 1%. The rate that data is transmitted at, the number of bits
sent per second.
SHORT MESSAGE contains 112 bits of data, and does not include location information. The
message length is 280 Ms. +/- 1% long, and with the un-mod time, the transmission time is 440
Ms. +/- 1% long
LONG MESSAGE contains 144 bits of data, and includes location information. The message
length is 360 Ms. +/- 1% long and with the un-mod time, the transmission time is 520 Ms. +/-
1% long
REPETITION PERIOD shall not be so stable that any two transmitters appear to be synchronized
closer than a fraction of a second in a five minute period. The mean period between
transmissions shall be randomized around 50 seconds and between 47.5 to 52.5 seconds
MAXIMUM CONTINUOUS TRANSMISSION shall not exceed 45 seconds
BEACON ACTIVATION On activation, the beacon shall not transmit a 406 Mhz. distress message
until at least one repetition period (+/- 50 SEC) has elapsed without a transmission.
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