Instruction manual

PROFICIENCY IN SURVIVAL CRAFT AND RESCUE BOATS OTHER THAN
FAST RESCUE BOATS
14 22
On receipt of a radar pulse the video amplifier and detector circuit causes
the rest of the circuitry to become active and the unit switches to transmit
mode. In this condition the indicator circuit causes the LED to remain steady
and the buzzer to sound every two seconds.
The detection of a radar pulse causes the switch to connect the antenna
to the transmitter circuit. The output stage is fed by a Voltage Controlled
Oscillator (VCO), whose frequency is determined by a sweep generator.
When triggered by the detector the sweep generator turns on the VCO and
causes it to produce exactly 12 forward and reverse frequency sweeps before
shutting down again.
If no radar pulses are detected for a period of 15 seconds the unit reverts
to standby mode.
Start Status Buzzer Red led
OFF OFF OFF
STAND BY MODE
( Test or On )
OFF FLASHING EVERY
3 Seconds
ACTIVELY
TRANSPONDER
( Test or On )
ON EVERY
2 Seconds
ON
Fig. 14- 9 Extending of SART