SERTEL T-GPS-300 User Manual - page 16
Permissible Code Formats
Format
Modulation Type
Carrier Frequency
Coded Expressions
B
0,1,2
0,2,3,4,5
0,1,2,3,4,5,6,7
E
0,1
0,1,2
1,2,5,6
The bits are modulated on a carrier. A three-digit suffix specifies the type and frequency of the
carrier, and which optional information is included:
Modulation type
0. (DCLS) Direct Current Level Shift (width coded)
1. Sine wave carrier (amplitude modulated)
2. Manchester modulated
Carrier frequency
0. No carrier (DCLS)
1. 100 Hz (10 ms resolution)
2. 1 kHz (1 ms resolution)
3. 10 kHz (100 µs resolution)
4. 100 kHz (10 µs resolution)
5. 1 MHz (1 µs resolution)
The IRIG-E signal is an amplitude modulated 100 Hz audio carrier. The output level is
adjustable from 2 to 3 volts peak to peak, and the input will accept levels between 150mV and 3V
peak to peak. The code contains 26 bits of BCD time-of-year information in days, hours, minutes,
and seconds, with 10 ms resolution. The time code recycles yearly.The IRIG-E signal can be
recorded and then played back on magnetic tape, transmitted over the air, or fed to another
9300 using a twisted pair.