sonardyne uk (head office) t. +44 (0) 1252 872288 f. +44 (0) 1252 876100 e. sales@sonardyne.com www.sonardyne.com datasheet high power transponder/responder (discontinued) description this type 7823 high power transponder/responder has been developed for operation with the sonardyne ultra-short baseline system (usbl) type 7707 in deep water on a towfish or rov. it can also be interrogated by other systems such as sonardyne pan type 7145. the transponder/responder has been designed as part of sonardyne?s integrated family of underwater acoustic navigation equipment and operates in the frequency band of 20-30khz. its high power output and pressure rating make it ideal for operation at long range in deep water. its ability to operate as a responder makes it suitable for use on noisy rovs and its reversion to transponder mode when the trigger is disconnected or held low means that it will allow the position of the rov to be determined if connections to it are lost. the excellent transducer response time and stable turnaround delays allows good measurement accuracies to be achieved and the delayed response provides a ?down to zero? ranging capability. it operates as a responder if the trigger input is pulsed, transmitting 61.3ms after the positive edge of the trigger pulse. otherwise if the trigger input is unused or held low it operates as a transponder with a turn around delay time of 62.5ms. it is designed for the mf band and optimised to give maximum source level transmitting around 27khz. other channels can be selected using an internal switch.
sonardyne uk (head office) t. +44 (0) 1252 872288 f. +44 (0) 1252 876100 e. sales@sonardyne.com www.sonardyne.com specifications subject to change without notice - 10/2006 specifications high power transponder/responder (discontinued) feature depth rating 4,000 metres operating frequency hf (18-36khz) quiescent life 730 days operating frequency hf (18-36khz) source level 208db re 1 pa @1m directivity index 12db @ 0 o (beamwidth 15 o ) pulse index 8ms receiver sensivity 80db responder trigger delay 61.3ms transponder turn around delay 62.5ms power alkaline battery life 600,000 responder trigger ttl pulse (min 10ms) triggered on positive going edge. it is configured for simultaneous transponde r and responder modes weight in air 30kg weight in water 15.5kg
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