The Thelma Biotel transmitters are not only versatile in regard to hardware. They can also be programmed to fit nearly any customer needs. For example, “sensor focus” was developed for when you have multiple sensors, such as an ADT (acceleration, depth, temperature), and the main focus is activity. The transmitters can be set to transmit a certain number of activity data points before it transmits a depth or temperature data point.
When fish is navigating shallow or violent waters such as river rapids or white-water, the transmits can get lost. Therefore, we have developed “delayed transmit”. This is where the tag is programmed to store the data so that it can be transmitted later. This is useful when measuring activity or depth when signals cannot be properly received.
Additionally, the transmitters are programmed for code collision minimization. To avoid constant code transmit collisions, the transmitters are set to send a transmit randomly within a given interval, for example between 30 and 60 seconds. This way, if two tags are set to transmit at the same time, it is highly unlikely that they will collide. Lastly, “AutoOff” was developed to make the tags stop transmitting signals after a given point in time. This can be useful if you were to drop a frequently transmitting range test tag in the water, where you would significantly increase the probability of code collisions, or if you want to avoid interference with later stages of, or separate projects.
Lastly, “sleep mode” is a setting where the transmitter can be programmed to start and stop at given times. For example if you tag the fish one day, and you want the tag to start working at a later point in time, this is a good option.
These functions can be programmed into all of our transmitters.