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2-7 Miscellaneous
2-7-1 Specifications
Power supply
Power consumption
2
Backup power supply
Geodetic system
Receiving frequency
Receiving method
Receiving sensitivity
Updating rate
Geodetic survey accuracy
(with SA (Selective
Availability) OFF)
Time to first fix
After memory loss
Communication method SONY standard serial communication
Antenna
2-26
Chapter 2 Using GPS Data (When Using an HKDW-704)
3.3 V (supplied from the camcorder)
270 mW (Typ)
Supplied from a backup battery of the
camcorder (CR2450) 7 µA (Typ)
Battery life: About 3 years when the HKDW-
704 GPS unit has been installed.
16 channels all in view
Corresponding to a calculation using 2
satellites
1575.42 MHz (L1 band, C/A code)
16 parallel channels all in view
–130 dBm or less
About 1 second
10 meters RMS in 2D operation without SA.
(Typ)
Speed 0.9 m/s (Typ)
(Time needed to calculate a location after
power on)
Cold start
a)
(no ephemeris
d)
almanac data
b)
Warm start
(no ephemeris data but with
almanac data) 33 to 50 seconds
Hot start
c)
(with ephemeris data and almanac
data) 6 to 20 seconds
Within 5 minutes; 3 to 6 seconds
More than 5 minutes; 6 to 10 seconds
Power voltage 3.3 V
d)
data and no
) 35 to 60 seconds
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