Specifications

BATS AND PORTABLE BATS OPERATION

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To track multiple targets (simultaneously) the BATS sequences through the various reply frequen-

cies while interrogating on one frequency, or it can sequence through the interrogation frequen-

cies and receive the same reply frequency, or a combination of the two. This capability provides the

operator with the versatility to track various combinations of targets. When the BATS sees that the

same interrogation frequency has been selected for a series of targets it automatically processes

the reply frequencies from the beacon within the same interrogation cycle.

Example #1:

Transponder #1 - Interrogation Freq.: 16 kHz, Reply Freq.: M-FSK ORE-01

Transponder #2 - Interrogation Freq.: 16 kHz, Reply Freq.: M-FSK ORE-02

Transponder #3 - Interrogation Freq.: 16 kHz, Reply Freq.: M-FSK ORE-03

Transponder #4 - Interrogation Freq.: 16 kHz, Reply Freq.: M-FSK ORE-04

NOTE: If the repetition interval is set to 4 seconds, Trackman updates each transponder posi-

tion every 4 seconds.

Example #2:

Transponder #1 - Interrogation Freq.: 17 kHz, Reply Freq.: M-FSK ORE-01

Transponder #2 - Interrogation Freq.: 18 kHz, Reply Freq.: M-FSK ORE-01

Transponder #3 - Interrogation Freq.: 19 kHz, Reply Freq.: M-FSK ORE-02

Transponder #4 - Interrogation Freq.: 20 kHz, Reply Freq.: M-FSK ORE-02

3.4.1 TRANSPONDER MODE

Acoustic Transponder Mode

To establish tracking in the Transponder mode, the Transponder’s interrogation frequency must

be in the frequency band of the Hydrophone’s interrogation transducer

and transponder(s) must

be operational and in the water.

From the Beacon dialog box select the SETUP tab and then select Active target. Select the target

symbol that you want the target to be represented by. Enter a name for the target. From the Bea-

con ACOUSTIC PARAMETER Tab set target type to Transponder, under “Reply Parameters” select

the Reply frequency/Code and the Turn Around Time, under “Interrogation Parameters” enter the

interrogation Interval, the Interrogation Frequency/ Pulse Width or code. (This information is found

the Multibeacon Label, 4370X) Select Trigger source, internal or external. From the DEPTH tab se-

lect depth mode or enter in depth manually.

The interrogation transducer inside the Model 4610B hydrophone has an optimal frequency range

of 17 to 20 kHz.