Thrane&Thrane TT-3020C, Руководство по настройке

Страница: 67 / 96

Surveillance zones
Transceiver Configuration
9-Nov-00 Page 4-33
it has prepared the next wakeup time and this can eas ily take
up to 1 minute if the transceiver is not engaged in other traffic.
•
Transceiver will wake up 1 minute after going to sleep and
transmit an "Enter Sleep Mode Report". (In software version
V3.20 this was 2 minutes).
•
If the transceiver is powered up during this 1 minute sleep
(Remote Switch set ON again) NO reports are transmitted.
•
There is a critical period of 10sec after wakeup. If the Main
Power fails during these 10 sec the transceiver will "sleep" for
24 hours. This critical period only applies to the interval wake-
ups during sleep and not the "Enter Sleep Mode Report" wake
up.
•
"Power Dow n "/"Power Up " reports are transmitted in pairs but
if this occurs after "Enter Sleep Mode Report" the tran s ceiver
will in addition to the power fail reports transmit a "Leave
Sleep Mode Report". When the transceiver goes to sleep
again (because Remote Sw itch is still OFF) a new "Enter
Sleep Mode Report" will be transmitted.
4.6 Surveillance zones
A surveillance zone is a geographical area, with a reporting i nterval
to be used when the vessel/vehicle is within the area. The zones
can be used to reduce or increase the number of transmitted pos i-
tion reports depending on, where the vessel/vehicle is. The surveil-
lance zone only affects the reporting interval of the VMS connection,
and can th erefor only be used in "fishery" and "landmobile" trans -
ceiver types. The surveillance zones are configured using a termi-
nal program, or remotely using Inmarsat poll (VMS DNID). Before
the zones can be programmed a valid co nfiguration password
must be entered.
7 types of zones with different shapes are defined