IT9X is an experimental beacon operational in CW,JT65B and BPSK located in JM78LB grid and its 50.057000 Mhzcarrieris very accurate withlock to a GPS receiver or a internal backup termalcontrolled stable reference.It is operational 24hours a day and runs 10 w into a loop antenna witha gain of 4,2 dBd using horizontal polarization. The beacon has been copied inAfrica,South America, United States, and in most grid squares in the continental Europe.
Reception reports are welcome ! Email it9x@it9tyr.com
Frequency on HP5345A referenced from a Efratom Rubidium 10Mhz locked to a Gps
IT9X Transmitting message sequence
01)
0:00-0:30
(JT65b)
IT9X/B JM78LB Only if GPS fix is valid
02)
0.30-1.00
(CW)
VVV IT9X/B JM78LB HHMMz see C)
03)
1:00-1:30
(CW)
VVV IT9X/B JM78LB HHMMz
04)
1:30-2:00
(BPSK)
Carrier, see B)
05)
2:00-2:30
(JT65b)
IT9X / B JM78LBOnly if GPS fix is valid
06)
2:30-3:00
(CW)
VVV IT9X/B JM78LB HHMMzsee C)
07)
3:00-3:30
(CW)
VVV IT9X/B 923M ASL 10W MLOOP HHMMz
08)
3:30-4:00
(CW)
VVV IT9X/B JM78LB HHMMz
09)
4:00-4:30
(JT65b)
IT9X/B JM78LB Only if GPS fix is valid
10)
4:30-5:00
(CW)
VVV IT9X/B JM78LB HHMMzsee C)
11)
5:00-5:30
(CW)
VVV IT9X/B JM78LB HHMMz
12)
5:30-6:00
(VAR)
Carrier, see A)
> Goto to first block
Transmitting info
HHMMzis the GMT time from GPS
If non valid GPS data at the end of a CW message it append a ”NOGPS”
If no supply from Ac source at the end of a CW messare it append a “ACLOSS”
A) Send a RF carrier > 5sec max power > 5sec -6dB power > 5sec no power > 5sec -6dB power > max power to the end of segment.
B) Send a BPSK carrier for 30sec segment of alternate 1 sec fase +-180deg from 1PPPs GPS timing.
C)This line is ignored, except at boot-up and for loss of GPS signal.The first two sequence of group (1 min) are used forJT65Bif no gps it send a “923M ASL 10W MLOOP” cw message for two segment of 30 sec.
The output carrier 50.057000 MHz is locked to a gps reference of +-0,1 hz max var.
If no gps the carrier 50.057000 MHz use internal reference at +-5 hz max var.
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