15.1 Technical specification —
Dragonfly-4
Physical specification — Dragonfly-4
Dimensions
• Display Width: 145 mm
(5.7 in)
• Display Height: 145 mm
(5.7 in)
• Display depth (NOT
including cables): 56 mm
(2.2 in)
• Display depth (including
cables): 146 mm (5.7 in)
Weight (unit including
bracket)
0.54 Kg (1.18 lbs)
Power specification — Dragonfly-4
Nominal supply voltage
12 V dc
Operating voltage range
10.8 V dc to 15.6 V dc
Power consumption at full
brightness
•
DV
– 3 W RMS
•
DVS
– 3.9 W RMS
•
Pro
– 4.3 W RMS
Power consumption in
PowerSave mode
•
DV
– 2.2 W RMS
•
DVS
– 3.2 W RMS
•
Pro
– 3.5 W RMS
Fuse and thermal breaker
ratings
• 2 A — Slow blow In-line
fuse (not supplied)
• 3 A — Thermal breaker
Display LCD specification — Dragonfly-4
Size
4.3 in
Type
TFT backlit LED
Color depth
24–bit
Resolution
480 x 272 WQVGA
Aspect
16:9
Viewing angle
• Left / Right: 70 degrees
• Top / Bottom: 50 / 70 degrees
Maximum
allowable
wrongly
illuminated pixels
5
Display environmental specification
Environmental specifications below apply to all
display variants
Operating
temperature
0 ºC to +55 ºC (32 ºF to 131 ºF)
Storage
temperature
-30 ºC to +70 ºC (-22 ºF to 158 ºF)
Relative humidity
Maximum 75%
Waterproof rating
• IPX6 and IPX7
Sonar / DownVision
™
specification
The following specification only applies to
DownVision
™
products.
Channels
2 x
CHIRP
(1 x traditional sonar and 1 x
DownVision
™
)
Beam
coverage
•
Sonar
—
conical
beam.
•
DownVision
™
— Wide (port / starboard)
and thin (fore / aft)
fan
beam.
Depth range
0.6 M (2 ft) to 183 m (600 ft). Depending on
water conditions, the Sonar channel maybe
able to achieve increased depth range over
the
DownVision
™
channel.
Note:
The
DV
and
Wi-Fish
™
variants are single
channel
DownVision
™
only products.
Internal GNSS (GPS / GLONASS) receiver
specification
The following specification applies to the
Pro
and
M
variants of
Dragonfly
®
products.
Channels
72
Cold start
<2 minutes
Receiver IC
Sensitivity
–167 dBm (Tracking) / –148 dBm
(Acquisition)
GNSS
compatibility
• GPS
• GLONASS
SBAS
compatibility
• WAAS
• EGNOS
• MSAS
Special features
Active Jamming and Interference
Reduction
Operating
frequency
• GPS L1 C/A
• GLONASS L10F
Signal Acquisition
Automatic
Almanac Update
Automatic
Geodetic Datum
WGS-84 (alternatives available
through GPS Setup options)
Refresh Rate
10 Hz (10 times per second Concurrent
GNSS)
Antenna
•
Internal
— Ceramic chip mounted
near top of unit
Position Accuracy
• Without SBAS: <= 15 metres 95%
of the time
• With SBAS: <= 5 metres 95% of the
time
128
Dragonfly–4 / Dragonfly–5 / Dragonfly–7 / Wi–Fish
