Transceiver active
The Transceiver active heading in the Numerical field contains information related to the transceiver in use on the relevant channel. In this context, the phrase channel is used as a common term to identify the combination of transceiver, transducer and operating frequency.
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Description
The following information is provided under the Transceiver active heading.
•  Pulse Duration
The Pulse Duration setting specifies the current duration ("length") of the transmitted pulse. You can manually select a pulse duration that suits your operation. The deeper you wish to see, the longer pulse duration should be selected. However, when using CW transmissions a long pulse duration will reduce the resolution. It will also cause the ME70 system to transmit less frequent. Remember that in the ME70, the pulse duration and the bandwidth are mutually dependant.
•  Sample Interval
The information from each ME70 transducer is a continuous flow of analogue data. In signal processing, sampling is the reduction of this continuous signal to a discrete signal. We convert a sound wave (which is an analogue continuous-time signal) to a sequence of samples (which is a discrete-time signal). The sample rate is the average number of samples obtained in one second. The sample interval is 1/sample rate to allow readout in time (normally milliseconds).
•  Power
You can change the output power manually. Output power is limited either to the maximum rating of the transducer, or the maximum rating of the transmitter, whichever is the smallest. For all practical purposes, this means that you can reduce the power output, but you can not increase it to beyond the power rating of the transducer.
•  Receiver bandwidth
Bandwidth is the difference between the upper and lower frequencies in the continuous band of frequencies the transceiver uses.
The current setting of this parameter is also shown in the Extras menu.