Page
70
of
254
Version
6.3
Rev
r012
Date
05-11-2022
Part No. 96000001
5.6.1
Frequency (kHz) 170 kHz – 450 kHz
The Sonic MBES operates on a user-selectable frequency, from 170 kHz to 450 kHz (standard with
Type 1006 projectors; the Type 1004 projector is limited to 200 kHz to 400 kHz), in 10 kHz steps.
The operating frequency can be changed on the fly; there is no need to stop recording data, go
offline, or load any firmware. The operating frequency is selected via the drop-down menu next to
Frequency (kHz) or can be typed in (within the 170 kHz to 450 kHz restrictions).
Figure 58: Operating Frequency Selection
5.6.1.1
700 kHz UHR (Sonic 2024/2022)
The optional UHR upgrade enables the sonar to operate at 700 kHz for Ultra High Resolution. If this
option is installed, there will be the added 700 kHz frequency, after 450, in the available frequency
list (as seen above). If the upgrade is not installed, there will be no listing of this frequency.
The UHR upgrade requires a Type 1006 projector, which covers the normal 170 – 450 kHz frequency
range, but can also provide the necessary power to operate at 700 kHz. The projector is specially
labeled with a blue indicator at the end of the projector.
When 700 kHz is selected, the swath sector will automatically be reduced to 70°. The UHR upgrade
is intended for short-range operation. In the UHR mode of operation, the across-track beamwidth is
0.3° (0.6° for the Sonic 2022) and the along-track beamwidth is 0.6°: true Ultra High Resolution
sonar.
5.6.1.2
UHR Operation Suggestions
When operating at the high 700 kHz frequency, it will be necessary to increase Power and
Absorption significantly (Absorption set to 200dB/km). Along with this will be a possible increase in
Pulse Length, Gain, and Spreading Loss. As frequency increases so do the effect of attenuation and
this is why when in UHR mode, the sonar operating settings need to be increased to increase the
total power going into the water and the higher gain needed to receive the attenuated signal. As
stated, the UHR mode is for short-range operation.
Содержание 2026
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Страница 158: ...Figure 174 Smooth log information copied from a real time survey log...
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Страница 237: ...Page 237 of 254 Version 6 3 Rev r012 Date 05 11 2022 Figure 215 Sonic 2026 Projector...
Страница 241: ...Page 241 of 254 Version 6 3 Rev r012 Date 05 11 2022 Figure 219 Sonic 2022 Receiver Projector horizontal offset...
Страница 242: ...Page 242 of 254 Version 6 3 Rev r012 Date 05 11 2022 Part No 96000001 Figure 220 Sonic 2024 Mounting Bracket Drawing...
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Страница 247: ...Page 247 of 254 Version 6 3 Rev r012 Date 05 11 2022 Figure 225 SIM Stack Outline...
Страница 249: ...Page 249 of 254 Version 6 3 Rev r012 Date 05 11 2022 Figure 227 Locking Ring type Deck Lead...
Страница 250: ...Page 250 of 254 Version 6 3 Rev r012 Date 05 11 2022 Part No 96000001 Figure 228 I2NS Type 42 IMU Dimensions...
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Страница 253: ...Page 253 of 254 Version 6 3 Rev r012 Date 05 11 2022 Figure 231 I2NS SIM Dimensions...
Страница 254: ...Page 254 of 254 Version 6 3 Rev r012 Date 05 11 2022 Part No 96000001 Figure 232 Dual Head Mount Offsets...