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LR-24
BACKPACK ELECTROFISHER
BURST OF PULSES WAVEFORMS
The burst of pulses waveform is a composite of two
waveforms. A lower frequency waveform (the cycle
frequency), used to turn on and off a higher frequency
waveform (the burst frequency). The following procedure
will guide you through setting up a gated burst waveform
on the LR-24.
1. Press the Pulse Type key so that the Output Pulse Type
screen appears.
2. Press the Down Arrow key until Burst of Pulses appears
on the display (
Fig. 5.15
), then press the Enter key.
3. Press the Freq. key and use the Arrow keys to set the
desired cycle frequency (
Fig. 5.16
). Then press the Enter
key.
4. Press the Duty Cycle key and use the Arrow keys to set the
desired number of pulses in the burst (
Fig. 5.17
). Press the
Enter key. Use the Arrow keys to set the burst frequency
(
Fig. 5.18
). Press the Enter key. Use the Arrow keys to set
the duty cycle of the pulse waveform, then press the Enter
key (
Fig. 5.19
). Press the Volts key and use the Arrow keys
to set the output voltage, then press the Enter key (
Fig.
5.20
). All three steps must be completed for any changes
to be effected.
5. Press the Power Limit key and use the Arrow keys to set
the power limit, then press the Enter key (
Fig. 5.21
).
6. Begin electrofishing.
NOTE:
Duty cycle and frequency can have a huge impact
on taxis. In general, lower frequencies are safer for larger
fish than higher frequencies. If you are not getting any
response from fish, change the LR-24 settings according
to adjustments a, b, and c on page 27.
SECTION 5: SETUP AND OPERATION (CONT.)
Output Pulse Type
Burst of Pulses
Fig. 5.15
Frequency
40Hz
Fig. 5.16
Pulses/Burst
5
Step 1 of 3
Fig. 5.17
Burst Frequency
400Hz
Step 2 of 3
Fig. 5.18
Voltage
150V
Fig. 5.20
Power Limit
400W
Fig. 5.21
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Menu
Volts
Freq.
Enter
Power
Limit
Store
Setup
Recall
Setup
Duty
Cycle
Pulse
Type
Fig. 5.19
Burst Duty
25%
1.3mS Pulse Width
Step 3 of 3