49
Installation Manual
Saturn Bm
EXT I/O
TEL.1
TEL.2
TEL.3
TEL.4
AUX
5 4 3 2 1
9 8 7 6
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
RJ45
1
2
3
4
5
6
7
8
Radio
Silence
indicator
Radio
Silence
switch
AUX connector
APPENDIX 9
Activation of "Radio Silence"
A “Radio Silence” function may be activated in the Saturn B terminal if the
MCU is provided with SW version 4.0 and above.
The function may be opened from the Display Handset through Function 78,
which is accessible when in Service level (see Saturn Bm Technical Manual).
“Radio Silence” is specially applicable onboard warships on which, at certain
periods, it is required that NO radiation shall take place.
The "Radio Silence" function will not affect the satellite tracking function.
In addition to opening the “Radio Silence” function an external switch must be
installed wired to pin no.1 and 2 of the AUX connector on the MCU.
This switch shall have 2 positions (OPEN or CLOSED).
Pin 7 and 8 of the AUX connector may be used for external indication of
"Radio Silence".
See below.
Radio Silence Mode
When the MCU is opened for “Radio Silence”,
and the switch is CLOSED
(connection between pin no.1 and 2 of the
AUX. port) the equipment is inhibited to
send, even Distress. The equipment may,
however, receive simplex broadcast
messages.
Shortly after the switch is
CLOSED, an internal relay
will start to turn the "Radio
Silence" indicator ON and
OFF for a few seconds
followed by steady ON
(relay closed), until the the
"Radio Silence" switch
again is opened.
Normal Operation Mode
When the MCU is opened
for “Radio Silence” func-
tion with the switch OPEN,
(no contact between pin 1
and 2) Saturn Bm oper-
ates as normal.
Summary of Contents for Saturn BM Marine
Page 1: ...Saturn Bm Marine Class 2 Installation Manual...
Page 55: ......
