Specifications

BATS AND PORTABLE BATS OPERATION
3-68
 BATS Beacon List setup when tracking 4 Transponders simultaneously.
Scenario: 4 Divers each have a Transponder strapped to them and the system tracks simultaneously to obtain an update of all divers
in 2 seconds.
 All beacons have same interrogation frequency but different reply codes/frequencies.
 Beacon 1 triggered internally. If the other channels interrogation frequency is set the same then the system knows to look for
replies from the other channels during the same transmission. (All Beacons are triggered by the same 17kHz interrogation from
Beacon 1. Xmit (interrogation) Interval must be longer than the slant range of the furthest target. E.g., If the furthest diver is
less than 1000m then a two-way travel time for a transponder at 1000m is approximately 1.4 seconds ((1000 meters / 1500 me-
ter/second) * 2 ) = 1.33 seconds). NOTE: Most transponders lockout for at least 1.5 seconds. This would be the minimum inter-
rogation interval possible.
 Beacon 1 LED’s (Trigger In, Interrogate, Receive) show status for Channel 1
 Beacon 2 LED’s (Trigger In, Interrogate, Receive) show status for Channel 2
 Beacon 3 LED’s (Trigger In, Interrogate, Receive) show status for Channel 3
 Beacon 4 LED’s (Trigger In, Interrogate, Receive) show status for Channel 4
 Trigger-Out 1 signal is transmitted at the time of each interrogation LED flash. (Trigger-In 1 (External trigger) is possible when
tracking one Beacon on this channel but is not applicable when tracking Beacons consecutively on this channel.)
Num
Target
Name
Type
Serial#
Chan#
Status
Xmit
Interval
Xmt
Freq
Recv
Freq
Pulse
Width
Manual
Depth
Filter
Level
Trigger
1
Beacon1
Transponder, Acoustic
1
Active
2
17 CW
M-FSK1
5
10
4
Internal
2
Beacon2
Transponder, Acoustic
2
Active
17 CW
M-FSK2
5
15
4
Internal
3
Beacon3
Transponder, Acoustic
3
Active
17 CW
M-FSK3
5
20
4
Internal
4
Beacon4
Transponder, Acoustic
4
Active
17 CW
M-FSK4
5
25
4
Internal