Columbus V - 990 Mark II, Руководство пользователя, Страница: 17 / 40

2
Point upward the GPS
reception antenna to help
receive satellite signals.
17
Getting Started
Start to Use
Acquiring position
(1) Long press the “power button” for 3s to turn on the device.
(2) In a relatively open outdoor environment, point the device reception antenna to the sky. Wait for
several minutes until the position is fixed. (The “GPS LED” flashes after the position is fixed)
Notes on acquisition time of the device*
There are three kinds of GPS acquisition at startup: cold start, warm start, and hot start.
(1) Cold start: 35s
A cold start is the startup in any of the following situations: the device is used for the first time;
ephemeris is lost due to low battery level; or the device has been moved for more than 1,000km
when it is turned off.
(2) Warm start: 32s
A warm start is the startup in one or more hours after the last positioning.
(3) Hot start: 1s
A hot start is the startup within one hour after the last positioning.
*The test environment is a place with relatively open view to the sky.
If it is difficult for the device to fix the position
and the GPS LED is always on, you should point
upward the antenna part of the device and wait
for a while. If the position still cannot be fixed
after 5 minutes, perhaps you are situated at a
place where GPS signals cannot reach. In such a
case, move to a place as open as possible and try
to fix the position once again.
It is not recommended for the receiver to fix the
position for the first time at an indoor window or
any other relatively enclosed environment.
3