JSATS AMT - Juvenile Salmon Acoustic Telemetry System Acoustic Micro Transmitter
- Overview
- Details
- Specifications
- Product Sheet
The Lotek JSATS AMT – Juvenile Salmon Acoustic Telemetry System Acoustic Micro Transmitter – was developed to satisfy the research and regulatory requirements for monitoring juvenile salmon in the Columbia River Basin. This acoustic transmitter’s small size and relatively long operational life permits tracking of sub-yearlings throughout their natural environment while minimizing impact upon them.
The Lotek JSATS AMT acoustic tag is compatible with all JSATS receiving systems and utilizes a Binary Phase-Shift Keying (BPSK) coding system that allows for tens of thousands of unique IDs on a single acoustic frequency. Each transmission consists of an ID and check sum delivered in less than one millisecond, thereby minimizing the probability of mis-identification or interference from code collision. The delay activation feature conserves battery life while fish recover from implantation.
Key features:
- Small form factor and light weight suitable for small fish / sub-yearling applications
- BPSK coding with sub-millisecond pulse and check sum for up to 65,536 unique IDs
- Sleep / Delay activation feature maximizes operational life during the tracking period
- Used for monitoring presence/absence and wireless positioning applications
| Lotek JSATS AMT Juvenile Salmon Acoustic Telemetry System Acoustic Micro-Transmitter |
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| TAG MODEL | Physical Specifications | Calculated Life (Days)* (with given transmission period) |
Calculated Life (Days)* (with given transmission period) |
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| Size (l x w x t) (mm) | Weight (g)** | 2 sec | 5 sec | 10 sec | 2 sec | 5 sec | 10 sec | |
| L-AMT-1.1 | 11.2 x 5.1 x 2.9 | 0.300 | 11 | 27 | 50 | 9 | 22 | 42 |
| L-AMT-2.1 | 11.8 x 5.1 x 3.8 | 0.430 | 16 | 40 | 76 | 13 | 33 | 63 |
| * Note: Warranty Life is defined as 70% of calculated life |
source level 150 dB (re. µPa @ 1 m) |
source level 154 dB (re. µPa @ 1 m) |
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** Stated weight in air may vary by ±5%
| Surface Roughness: | Smooth and devoid of sharp edges or protrusions |
| Coating: | Parylene-C (25 microns min. thickness) or alternate field proven encapsulation |
| Biocompatibility: | Biologically inert coating |
| Shape: | See photographs in "Overview" tab |
| Transmitter frequency: | 416.7 kHz ± 0.5% |
| Transmitter power: | Minimum source level of +150 dB (re: uPa @ 1 meter) |
| Transmitter beam pattern: | 3dB maximum variability |
| Message transmit interval: | Factory configurable - 1 second minimum / 1 second increments |
| Message encoding: | 31-bits, BPSK, with format as follows: 1. 7-bit Barker code (ox72) 2. 16-bit tag ID code (0x0000 – 0xFFFF) 3. 8-bit cyclic redundancy check (CRC), (oxFF) |
| Message length: | 744 microseconds |
| Number of possible tag ID codes: | 65,536 |
| On/off switch: | Non-contact acoustic trigger device, i.e. no exposed wires; tags are fully encapsulated when delivered. |
| Transmitter label: | Discernable 4-character code representing the 16-bit tag ID code (0xFFFF) |
Prior to delivery, 100% of all transmitters are tested for adherence to dimensional and dry weight specifications, acoustic source level, code sequence and transmit interval.
AMT Pre-Delivery Screening:
A permanent record1 is kept of the test results to include the above information as well as the date of the test, and the technician performing the test.
Shipment of AMT:
Transmitters are separated in the shipping box using shock absorbing high density anti-static foam.
1 Consists of date, lot #, transmitter ID, code technician, pulse rate, warranty life, size (l x w x h - mm), dry weight (mg), source level (dB re uPa @ 1 meter).
