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1 DEVELOPMENT CONCEPT
2 CONTENTS TH-D72A/E
Next, we turned our sights to applied functions of GPS.
Incorporating an internal GPS unit to support the collected positional information in APRS
applications is our minimum standard, and it is also very important to provide customers with applied
functions to enhance the convenience of the product.
Following are some examples of applied functions available with the internal GPS unit.
• GPS Logger Function:
It features the GPS logger function to log the tracking data. The maximum of 5,000 points seem
rather modest compared with a full-fledged GPS logger, but the GPS logger function on the
TH-D72A/E allows setting of the interval of records in the log according to the usage environment
and therefore is very useful. A user can choose from (1) the programmed interval duration, (2) the
programmed travel distance and (3) the timing of transmitting an APRS beacon.
The recorded movement trajectory data (log) can be exported to a PC with the MCP-4A,
dedicated memory control program for TH-D72A/E, installed and be saved in several file formats
including KML that is compatible with Google Earth.
• GPS Only mode:
A new mode is now added that disables all the features of the transceiver and allows only the GPS
logger to function. If you intend to only record the movement trajectory, using the mode results in
a substantial reduction in battery power consumption.
• Mark Waypoint and Target Point functions:
While you are on a trip, a maximum of 100 points that you want to store can be stored. The
recorded points can be used as a destination (a Target Point) for navigating while verifying the
distance and azimuth until the destination.
• Time adjustment function:
The current time data received from a GPS satellite can be used to manually or automatically set
the clock built in the transceiver.
• Display of GPS satellite information:
This is a familiar function of a typical GPS receiver. The location and signal strength of each
satellite can be viewed on the LCD screen.
1.2 Evolving Development