Vemco HR2, User Manual

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1.1 HR2 Receiver - Overview
The 180kHz
HR2 Receiver
is a submersible and autonomous or cabled receiver capable of decoding
two different methods of transmitting IDs to satisfy different study design objectives. To remain
compatible with VR2W receivers, the HR2 can detect tags transmitting our traditional PPM (pulse
position modulation) and the new HR transmissions at the same time.
This means that you can use the HR2 with your existing VR2W-180 receivers in
collaboration with other researchers in a large scale monitoring network or you can use
HR2 receivers to set up a small scale positioning experiment. HR2s are currently being
used to monitor and position migrating salmon in rivers, eels migrating to sea and non-
native predator impacts on native fish.
Common uses for HR2 receivers
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Monitoring hundreds of fish moving quickly through acoustic gates
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Ultra-fine scale positioning for behavioural studies including fish passage,
spawning, and habitat selection
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High residence studies of hundreds of tagged animals
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Frequent and precise positioning of fish (i.e. sub-meter every second depending on
tag transmission rate)
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Monitoring migration survival
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Monitoring predator and prey behavior
Advantages
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The HR system provides highest possible resolution data (high spatial resolution for
positioning studies (~1m) and frequent animal positions (of the order of seconds)
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Autonomously deployed HR receivers can easily be moved to different areas
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Add as many tagged animals to the system as desired without affecting the frequency with which
positions are calculated
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Connect a cable to any receiver at any time to view detections in real time
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Compatible with VR2W-180 kHz receivers; detects two transmission systems simultaneously
(PPM & HR) to support high residence and long term monitoring studies
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Communicate diagnostic information (for example, receiver health, tilt, ambient noise level,
temperature, detection counts) to a surface VR100-200 through a transponding link
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Detects VEMCO’s family of high frequency tags (weighing 0.42g to 2.0g) making it ideal for
juvenile to large fish (20g+ weight)
Transponding
Rather than employing a diver to check your receivers, you can communicate with the receivers
remotely from the surface to learn about their status (
tilt , battery level , number of detections , and
number of detections of IDs of interest). Having transponding capability adds tremendous value in
numerous scenarios including VPS studies, range testing and knowing if fish have passed a receiver
gate.
The HR2 communicates to the surface through our VR100-200
active tracking receiver. It is compatible with all VR100-200
models sold since January 2013.
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HR2 Receiver User Guide