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490 INSTALLATION MANUAL, Revision B2
Table 7: 490 technical specifications
Performance characteristics
Frequencies
Output power
Pulse lengths
Pulse repetition rate
Alarms
Update rate
Zoom modes
Auto modes
Navigation data
Display modes
Physical characteristics
Dimensions
Weight
APPENDIX A
Technical
specifications
50 and 200 kHz
1000 watts (490-D); 600 watts (490-S)
0.1 to 2 ms
30 to 600 pulses/min
Fish, bottom, and temperature
10 Hz maximum (depends on water depth)
Marker, bottom lock, bottom lock/center, bottom
Fishing or cruising
Shown on bottom of screen
Single/dual frequency, split-screen, four zoom
modes, A-Scope
10 x 6.25 x 2.5 inches (including backplate)
2 pounds
Page 29
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