Acquiring Gps Signals; Specifications - Kenwood KNA-G421 Installation Manual

Acquiring GPS Signals

The first time you turn on the KNA-G421, you must wait while the system acquires satellite signals for the first time. This process
could take up to several minutes. Make sure your vehicle is outdoors in an open area away from tall buildings and trees for fastest
acquisition. After the system acquires satellites for the first time, it will acquire satellites quickly each time thereafter.
Changing the Fuses
If you need to replace a fuse on the red or yellow wires, make sure the wires are not touching to prevent a short circuit. Then replace
the old fuse with a new 2 Amp fuse.
Caution
When replacing a fuse, use only a new fuse with the prescribed rating. Using a fuse with the wrong rating may cause your unit to
malfunction. Disconnect the wiring harness before replacing a fuse to prevent short circuits.

Specifications

General
Operating Temperature: -15°C to 70°C
Storage Temperature: -40°C to 85°C
Operating Voltage: 9.5 V to 25 V
Current Consumption: 0.13 A typical at 13 V (Max 1.0 A at 13 V)
ACC off Current: 60 uA typical at 13 V
Dimensions: 30 mm H x 120 mm W x 117 mm L
Weight: 184 g
Map Storage: Internal non-removable memory and optional removable SD card (City Navigator™ map data)
Connectors: System/power, GPS antenna, SD card slot, Mini-B for optional FM traffic receiver
Navigation
Receiver: SiRF STAR III high-sensitivity GPS receiver
Frequency: 1,575.42 MHz
Acquisition Times*:
Warm:
< 1 second
Cold: < 38 seconds
AutoLocate : < 45 seconds
®
*On average for a stationary receiver with an open sky view
Update Rate: 1/second, continuous
GPS Accuracy:
Position: < 10 meters, typical
Velocity: 0.05 meter/sec RMS
DGPS (WAAS) Accuracy:
Position: < 5 meters, typical
Velocity: 0.05 meter/sec RMS
Antenna: External GPS antenna requires metal surface 60 mm x 60 mm or larger, such as a car roof or the included metal
plate. A larger metal mounting surface improves GPS reception.
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